Quickly find a node with a key named "steve"
<?php
$people = array(
array(
'david' => 'homebuilder',
'state' => 'WA'
),
array(
'steve' => 'programmer',
'state' => 'MN'
),
array(
'jim' => 'photographer',
'state' => 'TX'
),
);
$response = array_filter($people, function($person)
{
return isset($person['steve']);
});
print_r($response);
/*
Array
(
[1] => Array
(
[steve] => programmer
[state] => MN
)
)
0.00017094612121582
*/