array(
‘uid‘ => 100,
‘name‘ => ‘Sandra Shush‘,
‘url‘ => ‘urlof100‘
),
1 => array(
‘uid‘ => 5465,
‘name‘ => ‘Stefanie Mcmohn‘,
‘pic_square‘ => ‘urlof100‘
),
2 => Array(
‘uid‘ => 40489,
‘name‘ => ‘Michael‘,
‘pic_square‘ => ‘urlof40489‘
)
);
$found_key = array_search(40489, array_column($userdb, ‘uid‘));
/**
如果$userdb很大，建议使用一个变量，避免搜索每个元素时都调用array_column()
$uid = array_column($userdb, ‘uid‘);
$found_key = array_search(40489, $uid);
*/
var_dump($found_key);php利用array_search与array_column实现二维数组查找
原文：https://www.cnblogs.com/ianlab/p/13150613.html
