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PHP array_flip () function

PHP Array Reference Complete PHP Array Reference

Examples

Reverse array keys and the corresponding associated key:

<?php
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$result=array_flip($a1);
print_r($result);
?>

Running instance »

Definition and Usage

array_flip () function is used to reverse / exchange key array keys and an association.


grammar

array_flip( array );

参数 描述
array 必需。规定需进行键/值对反转的数组。

technical details

return value: If successful reverse, inverted array is returned. If the reversal fails, it returns NULL.
PHP version: 4+


PHP Array Reference Complete PHP Array Reference