PHP | Pixel Envision Ltd.

PHP Credit Card Validation class using Mod 10 (Luhn) + more!

February 17, 2012 PHP, Programming

Here is another PHP code snippet from my library. This PHP class allows you to validate credit card information before processing it further. Doing all possible off-line checks before sending it to he credit card gateway will help you save time & money…

If the card is valid it will return cleaned & formatted card number along with the card type (Visa, Mastercard, Amex, Dinners, Discover, JCB & Maestro).

Besides regular checks, validates the card number against Mod 10 (Luhn) as well as know test card numbers…

Features

Checks if the card number, expiration date & validation numbers are valid.
Checks if the card is expired
Finds & returns the card type.
Checks against the known test card numbers.
Validates the card number using Mod 10 algorithm.

Usage Sample

<?php
require ('mod10.php');
$CARDTYPE = $ErrArr = NULL;

$cc = new CCVal($_POST["card_number"], $_POST["card_expire_month"], $_POST["card_expire_year"], $_POST["card_cvv2"]);

$cstatus = $cc->IsValid();

if ($cstatus[0] == "valid")
{
    $CARDTYPE = $cstatus[1];
    $_POST["card_number"] = $cstatus[2];
    $_POST["card_cvv2"] = $cstatus[3];
}
else
{
    $ErrArr = $cstatus;
}
?>

<?php

require ('mod10.php');

$CARDTYPE = $ErrArr = NULL;

$cc = new CCVal($_POST["card_number"], $_POST["card_expire_month"], $_POST["card_expire_year"], $_POST["card_cvv2"]);

$cstatus = $cc->IsValid();

if ($cstatus[0] == "valid")

{

$CARDTYPE = $cstatus[1];

$_POST["card_number"] = $cstatus[2];

$_POST["card_cvv2"] = $cstatus[3];

}

else

{

$ErrArr = $cstatus;

}

Download

Download PHP code snippet *UPDATED FOR AMEX CVV FIX
Code is PHP5 compatible but it should also work on PHP4 (Untested)

License

This code is free to use, distribute, modify and study. When referencing please link back to this website / post in any way e.g. direct link, credits etc. If you find this useful, please leave a comment and share using the buttons below!

<?php class CCVal
{
    var $__ccType = '';
    var $__ccNum = '';
    var $__ccExpM = 0;
    var $__ccExpY = 0;
    var $__ccCVV = '';
    function CCVal($num, $expm, $expy, $cvv)
    {
        if (!empty($num))
        {
            $cardNumber = ereg_replace("[^0-9]", "", $num);
            if (!empty($cardNumber))
            {
                $this - &gt;
                __ccNum = $cardNumber;
            }
        }

        if (!empty($cvv))
        {
            $cardCVV = ereg_replace("[^0-9]", "", $cvv);
            if (!empty($cardCVV))
            {
                $this - &gt;
                __ccCVV = $cardCVV;
            }
        }

        if (!is_numeric($expm) || $expm & lt;
        1 || $expm & gt;
        12)
        {
            $this - &gt;
            __ccExpM = NULL;
        }
        else
        {
            $this - &gt;
            __ccExpM = $expm;
        }

        $currentYear = date('Y');
        settype($currentYear, 'integer');
        $expy = $expy + 2000;
        if (!is_numeric($expy) || $expy & lt;
        $currentYear || $expy & gt;
        $currentYear + 15)
        {
            $this - &gt;
            __ccExpY = NULL;
        }
        else
        {
            $this - &gt;
            __ccExpY = $expy;
        }

        if (ereg("^5[1-5][0-9]{14}$", $this - &gt;
        __ccNum))
        {
            $this - &gt;
            __ccType = MASTERCARD;
        }
        elseif (ereg("^4[0-9]{12}([0-9]{3})?$", $this - &gt;
        __ccNum))
        {
            $this - &gt;
            __ccType = VISA;
        }
        elseif (ereg("^3[47][0-9]{13}$", $this - &gt;
        __ccNum))
        {
            $this - &gt;
            __ccType = AMEX;
        }
        elseif (ereg("^3(0[0-5]|[68][0-9])[0-9]{11}$", $this - &gt;
        __ccNum))
        {
            $this - &gt;
            __ccType = DINNERS;
        }
        elseif (ereg("^6011[0-9]{12}$", $this - &gt;
        __ccNum))
        {
            $this - &gt;
            __ccType = DISCOVER;
        }
        elseif (ereg("^(3[0-9]{4}|2131|1800)[0-9]{11}$", $this - &gt;
        __ccNum))
        {
            $this - &gt;
            __ccType = JCB;
        }
        elseif (ereg("^(5[06-8]|6)[0-9]{10,17}$", $this - &gt;
        __ccNum))
        {
            $this - &gt;
            __ccType = MAESTRO;
        }
        else
        {
            $this - &gt;
            __ccType = UNKNOWN;
        }
    }

    function IsValid()
    {

        $validFormat = false;
        $validExp = false;
        $passCheck = false;
        $validCVV = false;
        $testCard = false;

        switch ($this - &gt;
        __ccType)
        {
            case MASTERCARD:
                $validFormat = true;
            break;
            case VISA:
                $validFormat = true;
            break;
            case AMEX:
                $validFormat = true;
            break;
            case DISCOVER:
                $validFormat = true;
            break;
            case DINNERS:
                $validFormat = true;
            break;
            case JCB:
                $validFormat = true;
            break;
            case MAESTRO:
                $validFormat = true;
            break;
            default:

                $validFormat = false;
        }

        $cardExpM = $this - &gt;
        __ccExpM;
        $cardExpY = $this - &gt;
        __ccExpY;

        if ($cardExpM & amp; & amp;
        $cardExpY & amp; & amp;
        date('Ym') & lt; = $cardExpY . $cardExpM)
        {
            $validExp = true;
        }
        $cardCVV = $this - &gt;
        __ccCVV;

        if ($cardCVV & amp; & amp;
        (strlen($cardCVV) == 3 & amp; & amp;
        $this - &gt;
        __ccType != AMEX))
        {
            $validCVV = true;
        }
        elseif ($cardCVV & amp; & amp;
        (strlen($cardCVV) == 4 & amp; & amp;
        $this - &gt;
        __ccType == AMEX))
        {
            $validCVV = true;
        }

        $cardNumber = strrev($this - &gt;
        __ccNum);
        $numSum = 0;

        for ($i = 0;$i & lt;strlen($cardNumber);$i++)
        {
            $currentNum = substr($cardNumber, $i, 1);
            if ($i % 2 == 1)
            {
                $currentNum *= 2;
            }
            if ($currentNum & gt;
            9)
            {
                $firstNum = $currentNum % 10;
                $secondNum = ($currentNum - $firstNum) / 10;
                $currentNum = $firstNum + $secondNum;
            }

            $numSum += $currentNum;
        }

        $passCheck = ($numSum % 10 == 0);

        $testCard = in_array($this - &gt;
        __ccNum, array(
            '340000000000009',
            '341111111111111',
            '343434343434343',
            '346827630435344',
            '370000000000002',
            '370000200000000',
            '370407269909809',
            '370556019309221',
            '371449635398431',
            '374200000000004',
            '376462280921451',
            '377752749896404',
            '378282246310005',
            '378734493671000',
            '30000000000004',
            '30569309025904',
            '5019717010103742',
            '30204169322643',
            '30218047196557',
            '30221511563252',
            '36000000000008',
            '36148900647913',
            '36700102000000',
            '38000000000006',
            '38520000023237',
            '6011000000000004',
            '6011000000000012',
            '6011000400000000',
            '6011000990139424',
            '6011111111111117',
            '6011153216371980',
            '6011601160116611',
            '6011687482564166',
            '6011814836905651',
            '201400000000009',
            '201481123699422',
            '214925980592653',
            '214983972181233',
            '180001638277392',
            '180040153546898',
            '180058601526635',
            '3528000700000000',
            '3528723740022896',
            '3530111333300000',
            '3566002020360505',
            '3569990000000009',
            '630495060000000000',
            '6304900017740292441',
            '6333333333333333336',
            '5100080000000000',
            '5105105105105100',
            '5111111111111118',
            '5123619745395853',
            '5138495125550554',
            '5274576394259961',
            '5301745529138831',
            '5311531286000465',
            '5364587011785834',
            '5404000000000001',
            '5424000000000015',
            '5431111111111111',
            '5454545454545454',
            '5459886265631843',
            '5460506048039935',
            '5500000000000004',
            '5500939178004613',
            '5555555555554444',
            '5565552064481449',
            '5597507644910558',
            '6334580500000000',
            '6334900000000005',
            '633473060000000000',
            '6767622222222222222',
            '6767676767676767671',
            '5641820000000005',
            '6331101999990016',
            '6759649826438453',
            '4007000000027',
            '4012888818888',
            '4024007127653',
            '4222222222222',
            '4556069275201',
            '4556381812806',
            '4911830000000',
            '4916183935082',
            '4916603452528',
            '4929000000006',
            '4005550000000019',
            '4012888888881881',
            '4111111111111111',
            '4444333322221111',
            '4539105011539664',
            '4544182174537267',
            '4716914706534228',
            '4916541713757159',
            '4916615639346972',
            '4917610000000000',
            '4406080400000000',
            '4462000000000003',
            '4462030000000000',
            '4917300000000008',
            '4917300800000000',
            '4484070000000000',
            '4485680502719433'
        ));

        if ($validFormat & amp; & amp;
        $validExp & amp; & amp;
        $validCVV & amp; & amp;
        $passCheck & amp; & amp;
        !$testCard)
        {
            return array(
                "valid",
                $this - &gt;
                __ccType,
                $this - &gt;
                __ccNum,
                $this - &gt;
                __ccCVV
            );
        }
        else
        {
            $ERR = NULL;
            if (!$validFormat || !$passCheck) $ERR[] = "Invalid card number";
            if (!$validCVV) $ERR[] = "Invalid CVV2/CVC2 Number";
            if (!$validExp) $ERR[] = "Credit card has been expired";
            if ($testCard) $ERR[] = "Reserved card number";
            return $ERR;
        }
    }
}
?>

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<?php class CCVal

{

var $__ccType = '';

var $__ccNum = '';

var $__ccExpM = 0;

var $__ccExpY = 0;

var $__ccCVV = '';

function CCVal($num, $expm, $expy, $cvv)

{

if (!empty($num))

{

$cardNumber = ereg_replace("[^0-9]", "", $num);

if (!empty($cardNumber))

{

$this - >

__ccNum = $cardNumber;

}

if (!empty($cvv))

{

$cardCVV = ereg_replace("[^0-9]", "", $cvv);

if (!empty($cardCVV))

{

$this - >

__ccCVV = $cardCVV;

}

if (!is_numeric($expm) || $expm & lt;

1 || $expm & gt;

12)

{

$this - >

__ccExpM = NULL;

}

else

{

$this - >

__ccExpM = $expm;

}

$currentYear = date('Y');

settype($currentYear, 'integer');

$expy = $expy + 2000;

if (!is_numeric($expy) || $expy & lt;

$currentYear || $expy & gt;

$currentYear + 15)

{

$this - >

__ccExpY = NULL;

}

else

{

$this - >

__ccExpY = $expy;

}

if (ereg("^5[1-5][0-9]{14}$", $this - >

__ccNum))

{

$this - >

__ccType = MASTERCARD;

}

elseif (ereg("^4[0-9]{12}([0-9]{3})?$", $this - >

__ccNum))

{

$this - >

__ccType = VISA;

}

elseif (ereg("^3[47][0-9]{13}$", $this - >

__ccNum))

{

$this - >

__ccType = AMEX;

}

elseif (ereg("^3(0[0-5]|[68][0-9])[0-9]{11}$", $this - >

__ccNum))

{

$this - >

__ccType = DINNERS;

}

elseif (ereg("^6011[0-9]{12}$", $this - >

__ccNum))

{

$this - >

__ccType = DISCOVER;

}

elseif (ereg("^(3[0-9]{4}|2131|1800)[0-9]{11}$", $this - >

__ccNum))

{

$this - >

__ccType = JCB;

}

elseif (ereg("^(5[06-8]|6)[0-9]{10,17}$", $this - >

__ccNum))

{

$this - >

__ccType = MAESTRO;

}

else

{

$this - >

__ccType = UNKNOWN;

}

function IsValid()

{

$validFormat = false;

$validExp = false;

$passCheck = false;

$validCVV = false;

$testCard = false;

switch ($this - >

__ccType)

{

case MASTERCARD:

$validFormat = true;

break;

case VISA:

$validFormat = true;

break;

case AMEX:

$validFormat = true;

break;

case DISCOVER:

$validFormat = true;

break;

case DINNERS:

$validFormat = true;

break;

case JCB:

$validFormat = true;

break;

case MAESTRO:

$validFormat = true;

break;

default:

$validFormat = false;

}

$cardExpM = $this - >

__ccExpM;

$cardExpY = $this - >

__ccExpY;

if ($cardExpM & amp; & amp;

$cardExpY & amp; & amp;

date('Ym') & lt; = $cardExpY . $cardExpM)

{

$validExp = true;

}

$cardCVV = $this - >

__ccCVV;

if ($cardCVV & amp; & amp;

(strlen($cardCVV) == 3 & amp; & amp;

$this - >

__ccType != AMEX))

{

$validCVV = true;

}

elseif ($cardCVV & amp; & amp;

(strlen($cardCVV) == 4 & amp; & amp;

$this - >

__ccType == AMEX))

{

$validCVV = true;

}

$cardNumber = strrev($this - >

__ccNum);

$numSum = 0;

for ($i = 0;$i & lt;strlen($cardNumber);$i++)

{

$currentNum = substr($cardNumber, $i, 1);

if ($i % 2 == 1)

{

$currentNum *= 2;

}

if ($currentNum & gt;

{

$firstNum = $currentNum % 10;

$secondNum = ($currentNum - $firstNum) / 10;

$currentNum = $firstNum + $secondNum;

}

$numSum += $currentNum;

}

$passCheck = ($numSum % 10 == 0);

$testCard = in_array($this - >

__ccNum, array(

'340000000000009',

'341111111111111',

'343434343434343',

'346827630435344',

'370000000000002',

'370000200000000',

'370407269909809',

'370556019309221',

'371449635398431',

'374200000000004',

'376462280921451',

'377752749896404',

'378282246310005',

'378734493671000',

'30000000000004',

'30569309025904',

'5019717010103742',

'30204169322643',

'30218047196557',

'30221511563252',

'36000000000008',

'36148900647913',

'36700102000000',

'38000000000006',

'38520000023237',

'6011000000000004',

'6011000000000012',

'6011000400000000',

'6011000990139424',

'6011111111111117',

'6011153216371980',

'6011601160116611',

'6011687482564166',

'6011814836905651',

'201400000000009',

'201481123699422',

'214925980592653',

'214983972181233',

'180001638277392',

'180040153546898',

'180058601526635',

'3528000700000000',

'3528723740022896',

'3530111333300000',

'3566002020360505',

'3569990000000009',

'630495060000000000',

'6304900017740292441',

'6333333333333333336',

'5100080000000000',

'5105105105105100',

'5111111111111118',

'5123619745395853',

'5138495125550554',

'5274576394259961',

'5301745529138831',

'5311531286000465',

'5364587011785834',

'5404000000000001',

'5424000000000015',

'5431111111111111',

'5454545454545454',

'5459886265631843',

'5460506048039935',

'5500000000000004',

'5500939178004613',

'5555555555554444',

'5565552064481449',

'5597507644910558',

'6334580500000000',

'6334900000000005',

'633473060000000000',

'6767622222222222222',

'6767676767676767671',

'5641820000000005',

'6331101999990016',

'6759649826438453',

'4007000000027',

'4012888818888',

'4024007127653',

'4222222222222',

'4556069275201',

'4556381812806',

'4911830000000',

'4916183935082',

'4916603452528',

'4929000000006',

'4005550000000019',

'4012888888881881',

'4111111111111111',

'4444333322221111',

'4539105011539664',

'4544182174537267',

'4716914706534228',

'4916541713757159',

'4916615639346972',

'4917610000000000',

'4406080400000000',

'4462000000000003',

'4462030000000000',

'4917300000000008',

'4917300800000000',

'4484070000000000',

'4485680502719433'

));

if ($validFormat & amp; & amp;

$validExp & amp; & amp;

$validCVV & amp; & amp;

$passCheck & amp; & amp;

!$testCard)

{

return array(

"valid",

$this - >

__ccType,

$this - >

__ccNum,

$this - >

__ccCVV

);

}

else

{

$ERR = NULL;

if (!$validFormat || !$passCheck) $ERR[] = "Invalid card number";

if (!$validCVV) $ERR[] = "Invalid CVV2/CVC2 Number";

if (!$validExp) $ERR[] = "Credit card has been expired";

if ($testCard) $ERR[] = "Reserved card number";

return $ERR;

}

How I integrated osTicket to WordPress

September 7, 2011 PHP, Tips & Tricks

I’ve been looking for ways to provide a proper customer support for our website & products. Of course, just giving out your support email could also do it, but I wanted to have centralized on-line solution which makes things easier on both sides of a support request.

After looking for options (of course there are better paid alternatives), I have decided to use osTicket, which is a widely-used open source support ticket system. osTicket also supports email piping, so customers can submit new support request simply by sending an email to us. Email piping support was one of the key factors for my decision.

osTicket Bugs & Fixes

While working on the integration, I’ve noticed few bugs in the osTicket (v1.6.0 Stable) that needs to be fixed for a proper operation.

Captcha Image Problem

After the installation & setup of osTicket I have noticed captcha images are not shown properly. Most of the major browsers were failing to show captcha image by displaying the red X instead. In order to fix that problem you have to edit following file located in “include” subfolder.

class.captcha.php

Edit that file and look for the line #48 and change it as follows:

//Original
Header("(captcha-content-type:) image/png");

//Fixed
Header("Content-Type: image/png");

//Original

Header("(captcha-content-type:) image/png");

//Fixed

Header("Content-Type: image/png");

Captcha Validation Problem

When trying out the system, I have noticed submitting a new ticket is not possible for logged in users. Captcha image is not shown for logged in users (which is a proper thing to do) and when the new ticket is submitted, validation fails. In order to fix that problem you have to edit following file located in the root folder. Thanks to rayflexcom @ osTicket forum for the original fix.

open.php

Edit that file and look for the line #23 and change it as follows:

//Original
if (!$thisuser && $cfg->enableCaptcha())
{
    if (!$_POST['captcha']) $errors['captcha'] = 'Enter text shown on the image';
    elseif (strcmp($_SESSION['captcha'], md5($_POST['captcha']))) $errors['captcha'] = 'Invalid - try again!';
}

//Fixed
if ($thisclient && $thisclient->getId() && $thisclient->isValid())
{
}
else
{
    if (!$thisuser && $cfg->enableCaptcha())
    {
        if (!$_POST['captcha']) $errors['captcha'] = 'Enter text shown on the image';
        elseif (strcmp($_SESSION['captcha'], md5($_POST['captcha']))) $errors['captcha'] = 'Invalid - try again!';
    }
}

//Original

if (!$thisuser && $cfg->enableCaptcha())

{

if (!$_POST['captcha']) $errors['captcha'] = 'Enter text shown on the image';

elseif (strcmp($_SESSION['captcha'], md5($_POST['captcha']))) $errors['captcha'] = 'Invalid - try again!';

}

//Fixed

if ($thisclient && $thisclient->getId() && $thisclient->isValid())

{

}

else

{

if (!$thisuser && $cfg->enableCaptcha())

{

if (!$_POST['captcha']) $errors['captcha'] = 'Enter text shown on the image';

elseif (strcmp($_SESSION['captcha'], md5($_POST['captcha']))) $errors['captcha'] = 'Invalid - try again!';

}

Embed osTicket to your WordPress Template

Initial integration is fairly easy, but to fully embed it into your template you should edit the html/css code in php files.

Base Setup

Locate the following file located in the root folder. This is a bit different than the other methods you can find on internet.

First of all, it checks for the current folder. If the request is coming from the osTicket’s default admin folder (scp) it won’t load the WordPress template. Without that line, osTicket admin pages will be broken hybrid of it’s own design and your template.

Second, if you are using WordPress permalinks like I do, sub-pages (contact/index.php, contact/open.php, etc.) will return header section of your WordPress 404 page. osTicket will work but that will not be very SEO friendly. Just change “/contact/” to match your setup (osticket, support, etc.)

main.inc.php

Edit that file and look for the line #99 (with the other includes and requires which you can find under the line that reads “#include required files”) and add the following code:

//Original
if (!strpos($_SERVER["SCRIPT_FILENAME"], "/scp/"))
{
    $_SERVER["REQUEST_URI"] = "/contact/";
    include (ROOT_DIR . '../wp-blog-header.php');
}

//Original

if (!strpos($_SERVER["SCRIPT_FILENAME"], "/scp/"))

{

$_SERVER["REQUEST_URI"] = "/contact/";

include (ROOT_DIR . '../wp-blog-header.php');

}

Template Integration

Edit following files located in the “include/client/” subfolder.

header.inc.php
footer.inc.php

Edit both files and change them as follows:

//header.inc.php
//Add this to the top of the file
get_header();
//Keep the original html menu code starting with <div id="container">
//footer.inc.php
//Add this after the closing div tag for container </div>
get_footer();

//header.inc.php

//Add this to the top of the file

get_header();

//Keep the original html menu code starting with <div id="container">

//footer.inc.php

//Add this after the closing div tag for container </div>

get_footer();

For rest of the changes you should check the files on root folder & “include/client/” folder and edit html/css code to match your template.

You can see the live version of my integration by visiting our “support” page.

If you find this useful, please leave a comment and share using the buttons below!

PHP Currency Converter

August 18, 2011 PHP, Programming

Here is another PHP code snippet from my library. This PHP function allows you to calculate exchange amounts between 49 countries and 33 currencies.

Function is based on the live conversion reference rates provided by European Central Bank.

Usage

First 3 parameters are required. First one is the origin currency and the second one is target currency.
First 2 parameters should be the same type. If you are doing a county code based conversion both must be country codes. If you are doing currency code based conversion, both should be currency codes.
3rd parameter is the amount you want to be converted. Should be decimal digits without any currency signs or codes attached to it.
4th parameter is optional and set as true by default. When enabled function will prepend or append the currency sign (or code) to the output amount. You may want to turn that off if you will use the returned amount in a calculation.
5th and the last parameter is calculation precision. Controls the number of digits after the decimal point. Default is 5.

Usage Samples

currency_convert(“EUR”,”USD”,100)
currency_convert(“FR”,”GB”,98);
currency_convert(“AUD”,”CNY”,145,false,8);
currency_convert(“GR”,”DK”,3500,true,2);

Download

Download PHP code snippet
Code is PHP5 compatible but it should also work on PHP4 (Untested)

License

<?php
// Realtime currency converter by Pixel Envision (E.Gonenc)
// Version 1.0 - 18 August 2011
// Based on the live conversion reference rates provided by European Central Bank
// http://www.ecb.europa.eu/
function currency_convert($from, $to, $amount, $sign = true, $sensitivity = 5)
{
    $RATES = $BASE = $in = $out = $append = NULL;

    //Array of available countries & currencies
    $CURRENCY = array(
        "US" => "USD",
        "BE" => "EUR",
        "ES" => "EUR",
        "LU" => "EUR",
        "PT" => "EUR",
        "DE" => "EUR",
        "FR" => "EUR",
        "MT" => "EUR",
        "SI" => "EUR",
        "IE" => "EUR",
        "IT" => "EUR",
        "NL" => "EUR",
        "SK" => "EUR",
        "GR" => "EUR",
        "CY" => "EUR",
        "AT" => "EUR",
        "FI" => "EUR",
        "JP" => "JPY",
        "BG" => "BGN",
        "CZ" => "CZK",
        "DK" => "DKK",
        "EE" => "EEK",
        "GB" => "GBP",
        "HU" => "HUF",
        "LT" => "LTL",
        "LV" => "LVL",
        "PL" => "PLN",
        "RO" => "RON",
        "SE" => "SEK",
        "CH" => "CHF",
        "NO" => "NOK",
        "HR" => "HRK",
        "RU" => "RUB",
        "TR" => "TRY",
        "AU" => "AUD",
        "BR" => "BRL",
        "CA" => "CAD",
        "CN" => "CNY",
        "HK" => "HKD",
        "ID" => "IDR",
        "IN" => "INR",
        "KR" => "KRW",
        "MX" => "MXN",
        "MY" => "MYR",
        "NZ" => "NZD",
        "PH" => "PHP",
        "SG" => "SGD",
        "TH" => "THB",
        "ZA" => "ZAR"
    );

    if (strlen($from) == 2 && strlen($to) == 2)
    { //Operate using country code
        if (isset($CURRENCY[$from]))
        {
            $in = $CURRENCY[$from];
        }
        if (isset($CURRENCY[$to]))
        {
            $out = $CURRENCY[$to];
        }
    }
    elseif (strlen($from) == 3 && strlen($to) == 3)
    { //Operate using currency code
        if (in_array($from, $CURRENCY))
        {
            $in = $from;
        }
        if (in_array($to, $CURRENCY))
        {
            $out = $to;
        }
    }
    else
    {
        echo "Error: You should either use 2 digit country codes or 3 digit currency codes!";
    }

    if ($in && $out)
    { //Both currencies available, continue
        //Load live conversion rates and set as an array
        $XMLContent = file("http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml");
        if (is_array($XMLContent))
        {
            foreach ($XMLContent as $line)
            {
                if (ereg("currency='([[:alpha:]]+)'", $line, $currencyCode))
                {
                    if (ereg("rate='([[:graph:]]+)'", $line, $rate))
                    {
                        $RATES[$currencyCode[1]] = $rate[1];
                    }
                }
            }
        }
        if (is_array($RATES))
        {

            $RATES["EUR"] = 1; //Add EUR reference to array
            if ($in != "EUR")
            { //Normalize rate to given input
                $BASE = $RATES[$in];
                foreach ($RATES as $code => $rate)
                {
                    $RATES[$code] = round($rate / $BASE, $sensitivity);
                }
            }

            //Prepend or append the currency information
            if ($sign)
            {
                if ($out == "USD")
                {
                    echo "$";
                }
                elseif ($out == "EUR")
                {
                    echo "&euro;";
                }
                elseif ($out == "GBP")
                {
                    echo "&pound;";
                }
                elseif ($out == "JPY")
                {
                    echo "&yen;";
                }
                else
                {
                    $append = $out;
                }
            }

            echo round($amount * $RATES[$out], $sensitivity); //Output the converted amount
            if ($append)
            {
                echo " " . $append;
            }

        }
        else
        {
            echo "Error: Unable to load conversion rates!";
        }

    }
    else
    {
        echo "Error: Either one or both of given currencies are not available for conversion!";
    }
}

echo currency_convert("EUR", "USD", 1);
?>

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<?php

// Realtime currency converter by Pixel Envision (E.Gonenc)

// Version 1.0 - 18 August 2011

// Based on the live conversion reference rates provided by European Central Bank

// http://www.ecb.europa.eu/

function currency_convert($from, $to, $amount, $sign = true, $sensitivity = 5)

{

$RATES = $BASE = $in = $out = $append = NULL;

//Array of available countries & currencies

$CURRENCY = array(

"US" => "USD",

"BE" => "EUR",

"ES" => "EUR",

"LU" => "EUR",

"PT" => "EUR",

"DE" => "EUR",

"FR" => "EUR",

"MT" => "EUR",

"SI" => "EUR",

"IE" => "EUR",

"IT" => "EUR",

"NL" => "EUR",

"SK" => "EUR",

"GR" => "EUR",

"CY" => "EUR",

"AT" => "EUR",

"FI" => "EUR",

"JP" => "JPY",

"BG" => "BGN",

"CZ" => "CZK",

"DK" => "DKK",

"EE" => "EEK",

"GB" => "GBP",

"HU" => "HUF",

"LT" => "LTL",

"LV" => "LVL",

"PL" => "PLN",

"RO" => "RON",

"SE" => "SEK",

"CH" => "CHF",

"NO" => "NOK",

"HR" => "HRK",

"RU" => "RUB",

"TR" => "TRY",

"AU" => "AUD",

"BR" => "BRL",

"CA" => "CAD",

"CN" => "CNY",

"HK" => "HKD",

"ID" => "IDR",

"IN" => "INR",

"KR" => "KRW",

"MX" => "MXN",

"MY" => "MYR",

"NZ" => "NZD",

"PH" => "PHP",

"SG" => "SGD",

"TH" => "THB",

"ZA" => "ZAR"

);

if (strlen($from) == 2 && strlen($to) == 2)

{ //Operate using country code

if (isset($CURRENCY[$from]))

{

$in = $CURRENCY[$from];

}

if (isset($CURRENCY[$to]))

{

$out = $CURRENCY[$to];

}

elseif (strlen($from) == 3 && strlen($to) == 3)

{ //Operate using currency code

if (in_array($from, $CURRENCY))

{

$in = $from;

}

if (in_array($to, $CURRENCY))

{

$out = $to;

}

else

{

echo "Error: You should either use 2 digit country codes or 3 digit currency codes!";

}

if ($in && $out)

{ //Both currencies available, continue

//Load live conversion rates and set as an array

$XMLContent = file("http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml");

if (is_array($XMLContent))

{

foreach ($XMLContent as $line)

{

if (ereg("currency='([[:alpha:]]+)'", $line, $currencyCode))

{

if (ereg("rate='([[:graph:]]+)'", $line, $rate))

{

$RATES[$currencyCode[1]] = $rate[1];

}

if (is_array($RATES))

{

$RATES["EUR"] = 1; //Add EUR reference to array

if ($in != "EUR")

{ //Normalize rate to given input

$BASE = $RATES[$in];

foreach ($RATES as $code => $rate)

{

$RATES[$code] = round($rate / $BASE, $sensitivity);

}

//Prepend or append the currency information

if ($sign)

{

if ($out == "USD")

{

echo "$";

}

elseif ($out == "EUR")

{

echo "€";

}

elseif ($out == "GBP")

{

echo "£";

}

elseif ($out == "JPY")

{

echo "¥";

}

else

{

$append = $out;

}

echo round($amount * $RATES[$out], $sensitivity); //Output the converted amount

if ($append)

{

echo " " . $append;

}

else

{

echo "Error: Unable to load conversion rates!";

}

else

{

echo "Error: Either one or both of given currencies are not available for conversion!";

}

echo currency_convert("EUR", "USD", 1);

Finding visitors real IP using PHP

August 16, 2011 PHP, Programming

Third PHP snippet I’m sharing from my library is code that tries to get most accurate real IP of the visitor. There are few headers with the IP information but those can be populated with many different ip’s based on customers route to your server. This script evolved in time and I believe it returns a very accurate source IP based on the information given in the request headers. But if you find a bug or a way to enhance it more, let me know!

License

<?php
function realip()
{

    $ip = trim($_SERVER['REMOTE_ADDR']);

    if ($_SERVER["HTTP_CLIENT_IP"])
    {

        if (preg_match("~\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}~", trim($_SERVER["HTTP_CLIENT_IP"])) && !preg_match("~^((0|10|127|169\.254|172\.(1[6-9]|2[0-9]|3[0-1])|192\.0\.2|192\.168|255\.255\.255)\.)~", trim($_SERVER["HTTP_CLIENT_IP"])))
        {
            $ip = trim($_SERVER["HTTP_CLIENT_IP"]);
        }

    }
    elseif ($_SERVER["HTTP_X_FORWARDED_FOR"])
    {

        foreach (explode(",", $_SERVER["HTTP_X_FORWARDED_FOR"]) as $key)
        {

            if (preg_match("~\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}~", trim($key)) && !preg_match("~^((0|10|127|169\.254|172\.(1[6-9]|2[0-9]|3[0-1])|192\.0\.2|192\.168|255\.255\.255)\.)~", trim($key)))
            {
                $ip = trim($key);
                break;
            }

        }

    }
    return ($ip);
}

$IP = realip();
?>

<?php

function realip()

{

$ip = trim($_SERVER['REMOTE_ADDR']);

if ($_SERVER["HTTP_CLIENT_IP"])

{

if (preg_match("~\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}~", trim($_SERVER["HTTP_CLIENT_IP"])) && !preg_match("~^((0|10|127|169\.254|172\.(1[6-9]|2[0-9]|3[0-1])|192\.0\.2|192\.168|255\.255\.255)\.)~", trim($_SERVER["HTTP_CLIENT_IP"])))

{

$ip = trim($_SERVER["HTTP_CLIENT_IP"]);

}

elseif ($_SERVER["HTTP_X_FORWARDED_FOR"])

{

foreach (explode(",", $_SERVER["HTTP_X_FORWARDED_FOR"]) as $key)

{

if (preg_match("~\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}~", trim($key)) && !preg_match("~^((0|10|127|169\.254|172\.(1[6-9]|2[0-9]|3[0-1])|192\.0\.2|192\.168|255\.255\.255)\.)~", trim($key)))

{

$ip = trim($key);

break;

}

return ($ip);

}

$IP = realip();

PHP e-mail validation code snippet

August 15, 2011 PHP, Programming

Validation of email

This is the second PHP snippet I’m sharing from my library. It is not very complicated but get’s the job done. It both checks for the email syntax (REGEX) and existence of the email domain by checking MX & A records…

License

<?php
$email = "test@domain.com";

if (!preg_match("/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)*\.\w{2,8}$/i", $email))
{

    //E-mail syntax is invalid
    
}
elseif (!checkdnsrr(array_pop(explode("@", $email)) , "MX") & amp; & amp;
!checkdnsrr(array_pop(explode("@", $email)) , "A"))
{

    //Email server is not valid
    
}
else
{

    //E-mail is valid
    
}
?>

<?php

$email = "test@domain.com";

if (!preg_match("/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)*\.\w{2,8}$/i", $email))

{

//E-mail syntax is invalid

}

elseif (!checkdnsrr(array_pop(explode("@", $email)) , "MX") & amp; & amp;

!checkdnsrr(array_pop(explode("@", $email)) , "A"))

{

//Email server is not valid

}

else

{

//E-mail is valid

}

ZIP (POSTAL) Code Validation Regex & PHP code for 12 Countries

August 14, 2011 PHP, Programming

For the last couple of years, I’ve been mostly doing PHP coding. As a result, I have small library of code snippets of my own. Those are simple but useful PHP codes that might save some time on your work!

First one I’m sharing here today is the combination of regular expression and the PHP code to do ZIP code (or Postal Code) validation for following 12 countries: United States of America, United Kingdom, Germany, Canada, France, Italy, Australia, Netherlands, Spain, Denmark, Sweden & Belgium.

Code is provided in PHP but the REGEX codes are universal and those can be used with other programming languages.

License

<?php
$country_code = "US";
$zip_postal = "11111";

$ZIPREG = array(
    "US" => "^\d{5}([\-]?\d{4})?$",
    "UK" => "^(GIR|[A-Z]\d[A-Z\d]??|[A-Z]{2}\d[A-Z\d]??)[ ]??(\d[A-Z]{2})$",
    "DE" => "\b((?:0[1-46-9]\d{3})|(?:[1-357-9]\d{4})|(?:[4][0-24-9]\d{3})|(?:[6][013-9]\d{3}))\b",
    "CA" => "^([ABCEGHJKLMNPRSTVXY]\d[ABCEGHJKLMNPRSTVWXYZ])\ {0,1}(\d[ABCEGHJKLMNPRSTVWXYZ]\d)$",
    "FR" => "^(F-)?((2[A|B])|[0-9]{2})[0-9]{3}$",
    "IT" => "^(V-|I-)?[0-9]{5}$",
    "AU" => "^(0[289][0-9]{2})|([1345689][0-9]{3})|(2[0-8][0-9]{2})|(290[0-9])|(291[0-4])|(7[0-4][0-9]{2})|(7[8-9][0-9]{2})$",
    "NL" => "^[1-9][0-9]{3}\s?([a-zA-Z]{2})?$",
    "ES" => "^([1-9]{2}|[0-9][1-9]|[1-9][0-9])[0-9]{3}$",
    "DK" => "^([D-d][K-k])?( |-)?[1-9]{1}[0-9]{3}$",
    "SE" => "^(s-|S-){0,1}[0-9]{3}\s?[0-9]{2}$",
    "BE" => "^[1-9]{1}[0-9]{3}$"
);

if ($ZIPREG[$country_code])
{

    if (!preg_match("/" . $ZIPREG[$country_code] . "/i", $zip_postal))
    {
        //Validation failed, provided zip/postal code is not valid.
        
    }
    else
    {
        //Validation passed, provided zip/postal code is valid.
        
    }

}
else
{

    //Validation not available
    
}
?>

<?php

$country_code = "US";

$zip_postal = "11111";

$ZIPREG = array(

"US" => "^\d{5}([\-]?\d{4})?$",

"UK" => "^(GIR|[A-Z]\d[A-Z\d]??|[A-Z]{2}\d[A-Z\d]??)[ ]??(\d[A-Z]{2})$",

"DE" => "\b((?:0[1-46-9]\d{3})|(?:[1-357-9]\d{4})|(?:[4][0-24-9]\d{3})|(?:[6][013-9]\d{3}))\b",

"CA" => "^([ABCEGHJKLMNPRSTVXY]\d[ABCEGHJKLMNPRSTVWXYZ])\ {0,1}(\d[ABCEGHJKLMNPRSTVWXYZ]\d)$",

"FR" => "^(F-)?((2[A|B])|[0-9]{2})[0-9]{3}$",

"IT" => "^(V-|I-)?[0-9]{5}$",

"AU" => "^(0[289][0-9]{2})|([1345689][0-9]{3})|(2[0-8][0-9]{2})|(290[0-9])|(291[0-4])|(7[0-4][0-9]{2})|(7[8-9][0-9]{2})$",

"NL" => "^[1-9][0-9]{3}\s?([a-zA-Z]{2})?$",

"ES" => "^([1-9]{2}|[0-9][1-9]|[1-9][0-9])[0-9]{3}$",

"DK" => "^([D-d][K-k])?( |-)?[1-9]{1}[0-9]{3}$",

"SE" => "^(s-|S-){0,1}[0-9]{3}\s?[0-9]{2}$",

"BE" => "^[1-9]{1}[0-9]{3}$"

);

if ($ZIPREG[$country_code])

{

if (!preg_match("/" . $ZIPREG[$country_code] . "/i", $zip_postal))

{

//Validation failed, provided zip/postal code is not valid.

}

else

{

//Validation passed, provided zip/postal code is valid.

}

else

{

//Validation not available

}

PHP Cache Warmer (Preloader) for W3 Total Cache

August 3, 2011 PHP, Programming

If you haven’t noticed yet, this website is powered by WordPress and speed is optimized using W3 Total Cache… Previously I was using WP Super Cache but recently decided to try W3 Total Cache as it’s feature set (minify, cdn, etc.) is looking better. For my setup it actually worked better so I kept it as my caching plugin.

But it took me a while to figure out it’s “Cache Preload” option is not working well or at least not working as I expected. “Automatically prime the page cache” was checked but pages were not in cache…

After searching a bit I found the culprit. W3 Total Cache relies on internal cron of WordPress and it’s only triggered by site activity. If your site has no visitors for a while loading the pages will be slower because: 1. W3TC will check if the current page is cache and if it’s expired. 2. Needs to clean up that expired page and re-generate a current copy. 3. Finally serve that file.

My first attempt to fix that was trying to put a real cron job for wp-cron.php but that didn’t worked well. Cron was working but W3TC still failed to prime the cache. There are couple of threads about that at the wordpress support forums.

Optimus Cache Prime (OCP) is a smart cache preloader for websites with XML sitemaps. It crawls all URLs in a given sitemap so the web server builds cached versions of the pages before visitors or search engine spiders arrive.

My next attempt was trying to use Optimus Cache Prime, a Phyton script written by Patrick Mylund Nielsen.

That was exactly what I needed… But…

My host had Python 2.4 installed and ocp.py required 2.5+

I have asked my hosting (Inmotion) but they said they cannot change that on shared hosting and I should move to virtual private server (VPS) just for that… Yeah, sure!

Finally, I have decided to stop being lazy and created my own solution using PHP which I will be sharing here with you.

Idea

This PHP script has the same basic idea as Optimus Cache Prime and uses sitemap.xml as it’s source.

It will read the sitemap.xml file, parse the local URL’s listed in it. Then checks if the cache file for that url exists in W3TC. If the cache exists it will skip that url. But if not, it will visit the link using minimal resources causing the W3TC re-create cache for that page.

System Requirements

PHP5 (Required due to SimpleXML, you may change that to use with earlier versions of PHP)
W3 Total Cache
WP Super Cache (Not tested! But it should work)

Usage

Copy the code into a php file (warm.php) and place it in the site root where sitemap.xml exists.
Review/edit the configuration options inside the script.
Set a cron job to run that script every 5 minutes (or even every minute as the code is very easy on the system resources.)
Sample: */5 * * * * php -q /home/youraccount/public_html/warm.php
Thats it!

Features

Reads sitemap.xml as a file, saving a web server call.
Checks for the local cache file before trying to re-cache, saving resources.
Optionally uses priority tags in sitemap.xml
Configurable page limit per session, useful for larger sites.
Frees memory and stops executing as soon as possible to save further resources.
Failsafe to stop executing in case of an url or network problem.
New: Option to fix trailing slash cache creation problem.

Code & Download

Current version: Version 2.1 – 21 August 2011
Download warm.php

License

This code is free to use, distribute, modify and study. If you modify it please keep my copyright intact. When referencing please link back to this website / post in any way e.g. direct link, credits etc. If you find this useful, please leave a comment and share using the buttons below!

<?php
// W3 TOTAL CACHE WARMER (PRELOADER) by Pixel Envision (E.Gonenc)
// Version 2.1 - 21 August 2011
//Configuration options
$priority = true; //Use priorities defined in sitemap.xml (true/false)
$ppi = 10; //Pages to be cached per interval
$delay = 0.5; // Delay in seconds between page checks, default is half a second
$quiet = true; // Do not output process log (true/false)
$trailing_slash = false; // Add trailing slash to URL's, that might fix cache creation problems (true/false)
$sitemap = "sitemap.xml"; //Path to sitemap file relative to the warm.php
// Defaults for W3TC
$index = "_index.html"; //Cache file to check
$rootp = "wp-content/w3tc/pgcache"; //Root of cache
//Do not change anything below this line unless you know what you are doing
ignore_user_abort(true);
set_time_limit(600);

$xml = simplexml_load_file($sitemap);
$UL = $UP = array();
foreach ($xml->url as $url_list)
{
    $UL[] = $url_list->loc;
    $UP[] = $url_list->priority;
}
unset($xml);
if ($priority == true)
{
    arsort($UP, $sort_flags = SORT_NUMERIC);
}
$i = 0;
foreach ($UP as $key => $val)
{

    $path = $rootp;
    $url = $UL[$key];
    $sub = explode("/", $url);
    if ($sub[3])
    {
        $path .= "/" . urldecode($sub[3]);
    }
    if ($sub[4])
    {
        $path .= "/" . urldecode($sub[4]);
    }
    if ($sub[5])
    {
        $path .= "/" . urldecode($sub[5]);
    }
    $path .= "/" . $index;

    if (file_exists($path))
    {
        if ($quiet != true)
        {
            echo "Priority: " . $val . " => Skipped: " . $path . "\n";
        }
    }
    else
    {
        if ($trailing_slash == true)
        {
            $url = rtrim($url, "/") . "/";
        }
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 15);
        curl_setopt($ch, CURLOPT_HEADER, true);
        curl_setopt($ch, CURLOPT_NOBODY, true);
        $ret = curl_exec($ch);
        curl_close($ch);
        if ($ret)
        {
            $i++;
        }
        else
        {
            echo "Unable to connect $url, exiting...";
            break;
        }
        usleep($delay * 1000000);
        if ($quiet != true)
        {
            echo "Priority: " . $val . " => Warmed: " . $path . " by visiting " . $url . "\n";
        }
    }
    if ($i < $ppi)
    {
        flush();
    }
    else
    {
        break;
    }

}
exit;
?>

<?php

// W3 TOTAL CACHE WARMER (PRELOADER) by Pixel Envision (E.Gonenc)

// Version 2.1 - 21 August 2011

//Configuration options

$priority = true; //Use priorities defined in sitemap.xml (true/false)

$ppi = 10; //Pages to be cached per interval

$delay = 0.5; // Delay in seconds between page checks, default is half a second

$quiet = true; // Do not output process log (true/false)

$trailing_slash = false; // Add trailing slash to URL's, that might fix cache creation problems (true/false)

$sitemap = "sitemap.xml"; //Path to sitemap file relative to the warm.php

// Defaults for W3TC

$index = "_index.html"; //Cache file to check

$rootp = "wp-content/w3tc/pgcache"; //Root of cache

//Do not change anything below this line unless you know what you are doing

ignore_user_abort(true);

set_time_limit(600);

$xml = simplexml_load_file($sitemap);

$UL = $UP = array();

foreach ($xml->url as $url_list)

{

$UL[] = $url_list->loc;

$UP[] = $url_list->priority;

}

unset($xml);

if ($priority == true)

{

arsort($UP, $sort_flags = SORT_NUMERIC);

}

$i = 0;

foreach ($UP as $key => $val)

{

$path = $rootp;

$url = $UL[$key];

$sub = explode("/", $url);

if ($sub[3])

{

$path .= "/" . urldecode($sub[3]);

}

if ($sub[4])

{

$path .= "/" . urldecode($sub[4]);

}

if ($sub[5])

{

$path .= "/" . urldecode($sub[5]);

}

$path .= "/" . $index;

if (file_exists($path))

{

if ($quiet != true)

{

echo "Priority: " . $val . " => Skipped: " . $path . "\n";

}

else

{

if ($trailing_slash == true)

{

$url = rtrim($url, "/") . "/";

}

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 15);

curl_setopt($ch, CURLOPT_HEADER, true);

curl_setopt($ch, CURLOPT_NOBODY, true);

$ret = curl_exec($ch);

curl_close($ch);

if ($ret)

{

$i++;

}

else

{

echo "Unable to connect $url, exiting...";

break;

}

usleep($delay * 1000000);

if ($quiet != true)

{

echo "Priority: " . $val . " => Warmed: " . $path . " by visiting " . $url . "\n";

}

if ($i < $ppi)

{

flush();

}

else

{

break;

}

exit;

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