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PHP key () function

PHP Array Reference Complete PHP Array Reference

Examples

Returns the element keys inside pointer from the current position:

<?php
$people=array("Peter","Joe","Glenn","Cleveland");
echo "The key from the current position is: " . key($people);
?>

Running instance »

Definition and Usage

key () function returns the name of the key elements of the interior from the current cursor position.

If the error, the function returns FALSE.


grammar

key( array )

参数 描述
array 必需。规定要使用的数组。

technical details

return value: Returns the key current internal pointer points to the array element.
PHP version: 4+


PHP Array Reference Complete PHP Array Reference