Created
March 24, 2014 14:07
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Check if specific array key exists in multidimensional array - PHP
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<?php | |
$array = array( | |
'21' => array(), | |
'24' => array( | |
'22' => array(), | |
'25' => array( | |
'26' => array() | |
) | |
) | |
); | |
var_dump(multiKeyExists($array, 22)); | |
var_dump(multiKeyExists($array, 23)); | |
function multiKeyExists( Array $array, $key ) { | |
if (array_key_exists($key, $array)) { | |
return true; | |
} | |
foreach ($array as $k=>$v) { | |
if (!is_array($v)) { | |
continue; | |
} | |
if (array_key_exists($key, $v)) { | |
return true; | |
} | |
} | |
return false; | |
} | |
Output: | |
bool(true) | |
bool(false) | |
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Simpler version of your code (faster):
One thing, you are not accounting for a 3rd or 4th ..... dimensions right ?
In other words you will never find 222:
$array = array(
'21' => array(),
'24' => array(
'22' => array(),
'25' => array(
'26' => array(
'222' => array(),
)
)
)
);
function array_key_exists_r($needle, $haystack)
{
$result = array_key_exists($needle, $haystack);
if ($result) return $result;
}
// does not go deep enough
var_dump(multiKeyExists($array, '222'));
var_dump(multiKeyExists($array, '23'));
/// this works
var_dump(array_key_exists_r('222',$array));