Array_flip () of the sequence of PHP array functions swap the array key name with the value _php tips

Array_flip () Definition and usage

The Array_flip () function swaps the key name of the array with its corresponding value, where the key name becomes a value and the value becomes the key.

The Array_flip () function returns an inverted array, and if the same value occurs more than once, the last key name is the value and all other key names are lost.

If the data type of the value in the original array is not a string or an integer, the function will make an error.

Grammar
Array_flip (Array) parameter description
Array required. A specified array of inputs.

Example

Copy Code code as follows:

<?php
$a =array (0=> "Dog",1=> "Cat",2=> "horse");p Rint_r (Array_flip ($a));
?>

Output:

Array ([Dog] => 0 [Cat] => 1 [horse] => 2)