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| <p class="note">'''Please refer to [[Page_notes#Server settings|these notes]] before editing this page.'''</p>
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| == What is PHP? ==
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| PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.
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| == Where can I learn more about PHP? ==
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| === Online resources: ===
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| * The [http://www.php.net official PHP Homepage] with documentation, tutorials, FAQ, etc.
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| * The [http://www.w3schools.com/PHP/DEfaULT.asP W3Schools PHP Tutorial] is a great way to learn about PHP by example.
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| === Books: ===
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| * [http://books.google.de/books?id=iUfIqyAbIU4C&output=html PHP Cookbook] by David Sklar and Adam Trachtenberg.
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| * [http://www.manning.com/reiersol/ PHP in Action] by Dagfinn Reiersøl with Marcus Baker and Chris Shiflett. ([http://books.slashdot.org/article.pl?sid=08/01/23/1446243 Book review on Slashdot].)
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| == How is PHP used by Moodle? ==
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| * [[Installing Moodle/Creating custom php.ini files]]
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| * [[PHP settings by Moodle version]]
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| * [[PHP error logs]]
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| * [http://moodle.org/mod/forum/search.php?notwords=Re:&id=5&subject=php.ini php.ini related discussions] in the Moodle forums
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| == Which version of PHP is required by Moodle? ==
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| * See [[Installing_Moodle#Requirements]].
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| * You can tell which version you are using by looking at [[PHP info]].
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| ==How do I install PHP?==
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| Usually you don't have to install PHP at all, as normally it is installed alongside [[Apache]] and [[MySQL]] in a combination known as AMP (see [[Installing AMP]] for details). If you run Moodle on hosted web space PHP is also usually installed already.
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| It is possible to build PHP from source - you might have to if you need a very new version for developing Moodle - however, it is quite challenging. PHP itself has many dependencies that you will need to obtain and build, some of which are also tricky to build from source (e.g. GD).
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| ==How do I check the PHP configuration on my server?==
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| Run the [http://www.php.net/manual/en/function.phpinfo.php phpinfo()] command. It will display a whole lot of information about the current PHP configuration on your server.
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| You can also run this command from within Moodle. This option is available under
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| '''''Administration > Server > PHP info'''''.
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| The PHP info page provides information on the version of PHP your server is running, including PHP compilation options and extensions, server information, the PHP environment and OS version information.
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| If you have a problem with your Moodle site and ask for help in a Moodle.org forum, you may be asked to provide some information from this page.
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| See also [[phpinfo]] and [http://www.php.net/manual/en/function.phpinfo.php PHP manual: phpinfo].
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| == See also: ==
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| * [[Installing MSSQL for PHP]]
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| * [[Installing Oracle for PHP]]
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| * [[Installing Postgres for PHP]]
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| [[Category:FAQ]]
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| [[Category:Administrator]]
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| [[Category:Developer]]
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| [[de:PHP FAQ]]
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