(PHP 4, PHP 5)
array_flip — Exchanges all keys with their associated values in an array
$trans
) array_flip() returns an array in flip order, i.e. keys from trans
become values and values from trans
become keys.
Note that the values of trans
need to be valid keys, i.e. they need to be either integer or string. A warning will be emitted if a value has the wrong type, and the key/value pair in question will not be included in the result.
If a value has several occurrences, the latest key will be used as its values, and all others will be lost.
trans
An array of key/value pairs to be flipped.
Returns the flipped array on success and NULL
on failure.
Example #1 array_flip() example
<?php
$trans = array_flip($trans);
$original = strtr($str, $trans);
?>
Example #2 array_flip() example : collision
<?php
$trans = array("a" => 1, "b" => 1, "c" => 2);
$trans = array_flip($trans);
print_r($trans);
?>
now $trans is:
Array ( [1] => b [2] => c )