I have an array where I want to search the uid
and get the key of the array.
Assume we have the following 2-dimensional array:
$userdb = array(
array(
'uid' => '100',
'name' => 'Sandra Shush',
'pic_square' => 'urlof100'
),
array(
'uid' => '5465',
'name' => 'Stefanie Mcmohn',
'pic_square' => 'urlof100'
),
array(
'uid' => '40489',
'name' => 'Michael',
'pic_square' => 'urlof40489'
)
);
The function call search_by_uid(100)
(uid of first user) should return 0
.
The function call search_by_uid(40489)
should return 2
.
I tried making loops, but I want a faster executing code.
function searchForId($id, $array) {
foreach ($array as $key => $val) {
if ($val['uid'] === $id) {
return $key;
}
}
return null;
}
This will work. You should call it like this:
$id = searchForId('100', $userdb);
It is important to know that if you are using ===
operator compared types have to be exactly same, in this example you have to search string
or just use ==
instead ===
.
Based on angoru answer. In later versions of PHP (>= 5.5.0
) you can use one-liner.
$key = array_search('100', array_column($userdb, 'uid'));
Here is documentation: http://php.net/manual/en/function.array-column.php.