9th December 2015
In
Web Development
Applying and exploring predefined PHP arrays
Predefined arrays in PHP what are they?
- Pre-prepared scripts for common functions within PHP such as getting and posting data
- You do not see the code behind them – you just need to know they are there
- You use them in exactly the same way as any custom array or variable you have created
php.net has a good example of some common predefined arrays
Source: http://php.net/manual/en/reserved.variables.php
The most common ones you are likely to come across are:
$_POST = Used for posting form data $_GET = Used for retrieving data from a URL $_REQUEST = Can accept data either via GET or POST $_SERVER = Stores info about server location $_SESSION = Sessions are often used for persisting data during a user session $_COOKIE = Used for storing data in key value pairs and stored in the client (browser)
Some quick tips on $_GET, $_POST and $_REQUEST
- Use $_GET for short strings of data which do not carry sensitive info such as passwords
- Use $_POST for large amounts of data such as forms and for sensitive information
- Use $_REQUEST when you do not know or have any preference for how data is to be received by the application
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