note 112604 deleted from function.array-search by levim
| From: | levim@php.net | Date: | Mon, 24 Feb 2014 22:45:49 +0000 |
| Subject: | note 112604 deleted from function.array-search by levim | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-198660@lists.php.net to get a copy of this message | ||
Note Submitter: Best Served Cold dot Com
----
Unfortunately a lot of the very well written solutions to the multidimensional array search problem
did not work for me, so I wrote this:
<?php
function recursive_array_key_search ($needle, array $haystack)
{
foreach(is_array($needle) ? recursive_array_key_search(array_shift($needle), $haystack) :
$haystack as $key=>$value)
{
if((is_array($needle) && reset($needle) === $key) || $needle === $key)
{
return $value;
}
if (is_array($value) && $value = recursive_array_key_search($needle, $value))
{
return $value;
}
}
}
?>
The advantage of this script is that you can specify one or more keys to search on in an array which
passes down the array structure.
Take this array:
Array
(
[id] => 709
[type] => post
[slug] => derek
[url] => http://bestservedcold.com
[tags] => Array
(
[one] => Array
(
[id] => 167
[slug] => bob
[title] => Whateverville
[description] =>
[post_count] => 1
)
[two] => Array
(
[id] => 168
[slug] => mary
[title] => Single
[description] =>
[post_count] => 1
)
)
)
Then using the function you can return either a single variable:
<?php
recursive_array_key_search('url', $haystack); // returns 'http://bestservedcold.com'
recursive_array_key_search('slug', $haystack); // returns the first instance of slug:
'bob'
?>
Or, you can specify two or more keys to match in sequence, like so:
<?php
recursive_array_key_search(array('two', 'slug'), $haystack) // returns
'mary'
?>
I hope that's useful to someone!