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EasyPHP is an application that you install on your Windows computer which you can use as a development system for PHP / Apache and mySQL databases.
It can be downloaded form http://www.easyphp.org/ and I find it a very good way to develop applications using PHP on my Windows computer.
EasyPHP contains a single exectuable which when run, [...]

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What currency should you sell your products in ? 
PayPal is able to handle quite a wide range of currencies and you have to descide which currency you should sell your products in. 
I guess the question really is “are you selling to the world or are you expecting payments from customers who are based in your [...]

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phpMyAdmin is a program used to manipulate databases remotely through a web interface. A good hosting package will have this included.

Login to phpMyAdmin.
Create a new blank database first.
Click databases, and select the database that you will be importing your data into.
Across the top of the screen will be a row of tabs. [...]

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This desciption is applicable to all the applications PHP-eSeller, PHP-SecureArea and PHP-KeyCodes.
You should backup your database at regular intervals. You will then be able to restore the database if something goes wrong.
phpMyAdmin is the name of the program that you can use to manipulate databases.  It is usually provided as part of you control panel [...]

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Version PHP 5.3 has a number of functions that are depreciated and earlier versions of PHPeSeller, PHPSecureArea and PHPKeyCodes will display warning messages identifying those depreciated functions when installed on PHP 5.3.  It will still work as the functions are still there although they will be removed in PHP 6
To overcome this for earlier versions of the applications, in the [...]

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Error when using PHP Google Demo Code.
Apparantly this error can occur with certain web servers which have a PHP bug.
It can be fixed as explained at :
http://code.google.com/p/google-checkout-php-sample-code/issues/detail?id=37

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PHP-KeyCodes is a is used to sell software key codes or pin numbers using PayPal or Google Checkout.  The key codes are entered into the item details and when a customer makes a purchase, the first key code is removed and sent by email to the customer. This leaves the next key code ready for [...]

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This describes how to set up the SMTP email for use with PHP-eSeller, PHP-SecureArea, PHP-KeyCodes.
You may find that you web server is not sending out emails as well as you would like.  Shared web servers sometimes have issues with how quickly the email is sent out and the headers in the emails.
To use an external [...]

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PHP-KeyCodes is now able to use Google checkout as well as PayPal. 
In some ways Google checkout provides a better user experience than PayPal as the key code can be displayed to the customer on their Google checkout page. 
PHP-Keycodes can be used with a response handler (the code that monitors the transaction returned from Google checkout) [...]

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