note 31926 modified in function.array-diff-assoc by aidan
| From: | aidan@php.net | Date: | Wed, 09 Jun 2004 10:18:25 +0000 |
| Subject: | note 31926 modified in function.array-diff-assoc by aidan | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-70573@lists.php.net to get a copy of this message | ||
To unset elements in an array if you know the keys but not the values, you can do:
<?php
$a = array("foo", "bar", "baz", "quux");
$b = array(1, 3); // Elements to get rid of
foreach($b as $e)
unset($a[$e]);
?>
Of course this makes most sense if $b has many elements or is dynamically generated.
--was--
IHMO the documentation is not entirely clear so just to clarify:
This function looks at BOTH the key and the value, so you can't use it to
unset a list elements in an array if you know the keys but not the values.
Instead, you can e.g. do:
<?php
$a = array("foo", "bar", "baz", "quux");
$b = array(1, 3); // Elements to get rid of
foreach($b as $e)
unset($a[$e]);
?>
Of course this makes most sense if $b has many elements or is dynamically generated.
http://www.php.net/manual/en/function.array-diff-assoc.php