View source for PHP/en

<languages />'''PHP''' stands for '''Ph'''antastic '''P'''rogramming. You can use it to make things happen on pages.

It's different from JavaScript because JavaScript runs in your browser and PHP runs somewhere else I don't know where.They won't tell me where it runs.

== Having a PHP ==
You can make a php script by calling it <code>something.php</code>. It's a good idea to actually call it <code>something/index.php</code> so the URL remains the same if you decide to stop using PHP (a wise choice).

== Writing a PHP ==
You can write a PHP script like this:
 <?php
 echo "this is my cool script";
There's a pretty okay guide on the [https://www.php.net/manual/en/langref.php PHP website].

The <code><?php</code> bit tells PHP you're about to write some PHP. You can stop writing PHP and start writing HTML with <code>?></code>. 

Sometimes you'll want to insert some values from PHPland into your HTML, which you can do like this:
 <?php
 $my_value = "hello!";
 ?>
 
 <nowiki><p></nowiki>
   <?= $my_value ?>
 <nowiki></p></nowiki>

Note that if you're rendering user input in this way, you should wrap it in the <code>[https://www.php.net/manual/en/function.htmlspecialchars.php htmlspecialchars]</code> function, lest you become vulnerable to an [[wikipedia:Cross-site_scripting|XSS (Cross-site scripting)]] attack in which a nasty fellow inputs [[:Category:Evil Pages|evil]] HTML to make your site go [[:Category:Bad pages|bad]] and rotten like a hard-boiled egg.
[[Category:Pages with some amount of information in them]]