The get_defined_vars() function is an inbuilt function in PHP which is used to returns an array of all defined variables. This function returns a multidimensional array which contains all the list of variables, environment etc.
Syntax:
array get_defined_vars( void )
Parameters: This function does not accepts any parameter.
Return Value: This function returns a multidimensional array of all the variables.
Below program illustrates the get_defined_vars() function in PHP:
Program:
<?php   // Declare an array and initialize it $a = array(0, 1, 2, 3, 4);   // Use get_defined_vars() function $a = get_defined_vars();   // Display the output print_r($a); ?> |
Output:
Array
(
[_GET] => Array
(
)
[_POST] => Array
(
)
[_COOKIE] => Array
(
)
[_FILES] => Array
(
)
[argv] => Array
(
[0] => /home/9485b6f3bafb5e0e7b2d4580a85e639d.php
)
[argc] => 1
[_SERVER] => Array
(
[PHP_SELF] => /home/9485b6f3bafb5e0e7b2d4580a85e639d.php
[SCRIPT_NAME] => /home/9485b6f3bafb5e0e7b2d4580a85e639d.php
[SCRIPT_FILENAME] => /home/9485b6f3bafb5e0e7b2d4580a85e639d.php
[PATH_TRANSLATED] => /home/9485b6f3bafb5e0e7b2d4580a85e639d.php
[DOCUMENT_ROOT] =>
[REQUEST_TIME_FLOAT] => 1543316494.2727
[REQUEST_TIME] => 1543316494
[argv] => Array
(
[0] => /home/9485b6f3bafb5e0e7b2d4580a85e639d.php
)
[argc] => 1
)
[a] => Array
(
[0] => 0
[1] => 1
[2] => 2
[3] => 3
[4] => 4
)
)
Reference: http://php.net/manual/en/function.get-defined-vars.php
