note 126259 deleted from function.array-search by crell
| From: | crell@php.net | Date: | Thu, 31 Mar 2022 20:49:12 +0000 |
| Subject: | note 126259 deleted from function.array-search by crell | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-217968@lists.php.net to get a copy of this message | ||
Note Submitter: moe at moose dot at
----
I needed a function, that returns a value by specifying a keymap to the searched value in a
multidimensional array and came up with this.
$s is the keymap to the needle and $a the haystack array.
<?PHP
// search keymap $s in array $a
function get_key_in_array($s, $a)
{
if(is_array($s) && is_array($a[key($s)])) {
return get_key_in_array(reset($s), $a[key($s)]);
} else {
if(is_array($s)) $s = reset($s);
return isset($a[$s])?$a[$s]:false;
}
}
// usage examples
// ------------------------------
$arr = ['foo'=>['bar'=>['baz'=>77]]];
$s = ['foo'=>['bar'=>'baz']];
var_dump(get_key_in_array($s,$arr));
$s = ['foo'=>['bar'=>['baz']]];
var_dump(get_key_in_array($s,$arr));
$s = ['foo'=>['bar'=>['nix']]];
var_dump(get_key_in_array($s,$arr));
$s = ['foo'=>'bar'];
var_dump(get_key_in_array($s,$arr));
$s = ['foo'];
var_dump(get_key_in_array($s,$arr));
$s = 'foo';
var_dump(get_key_in_array($s,$arr));
?>