note 70786 deleted from function.array-unique by crell
| From: | crell@php.net | Date: | Tue, 12 Apr 2022 00:54:11 +0000 |
| Subject: | note 70786 deleted from function.array-unique by crell | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-218169@lists.php.net to get a copy of this message | ||
Note Submitter: Ome_Henk
----
For people looking at the flip flip method for getting unique values in a simple array. This is the
absolute fastest method:
<?php
$unique = array_keys(array_flip($array));
?>
It's marginally faster as:
<?php
$unique = array_merge(array_flip(array_flip($array)));
?>
And it's marginally slower as:
<?php
$unique array_flip(array_flip($array)); // leaves gaps
?>
It's still about twice as fast or fast as array_unique.
This tested on several different machines with 100000 random arrays. All machines used a version of
PHP5.