get_defined_vars

Definition and usage

get_define_vars() function returns an array containing all defined variables.

Example

Return all defined variables as arrays:

 <?php
$a = array ( "red" , "green" , "blue" ) ;

$arr = get_defined_vars ( ) ;

print_r ( $arr [ "a" ] ) ;
?>

Try it yourself

Example explanation:

In this example, $a is an array containing three color strings. After calling get_defined_vars() , it returns an array $arr that contains all variables defined in the current scope. Then output the content of $a variable, i.e. the color array, through print_r($arr["a"]) . Please note that the array key returned get_defined_vars() is the variable name, and the corresponding value is the value of the variable.

grammar

 get_defined_vars ( ) ;

Parameter value

none.