Exchanges all keys with their associated values in an array
Syntax
array_flip ( array $array ) : array
Parameters
arrayAn array of key/value pairs to be flipped.
Return
Returns the flipped array on success and NULL on failure.
Examples
1 · Indexed
<?
$array = array("a", "b", "c");
$return = array_flip($array);
print_r($return);
?>Array
(
[a] => 0
[b] => 1
[c] => 2
)
2 · Associative
<?
$array = array("a" => 0, "b" => 1, "c" => 2);
$return = array_flip($array);
print_r($return);
?>Array
(
[0] => a
[1] => b
[2] => c
)
3 · Collision
<?
$array = array("a" => 0, "b" => 0, "c" => 2);
$return = array_flip($array);
print_r($return);
?>Array
(
[0] => b
[2] => c
)
