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The array_flip Function

The array_flip function exchanges all keys with their associated values in an array.

Syntax

array_flip(array $array): array

Let's exchange the keys and values of the array:

<?php
	$arr = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5];
	var_dump(array_flip($arr));
?>

Code execution result:

[1 => 'a', 2 => 'b', 3 => 'c', 4 => 'd', 5 => 'e']