如何在PHP中有效地搜索子数组？

Question

$arr = array($arr1,$arr2,..);

如何搜索$arr以查找key1 => 'something'，key2 => 'something else'

的{{1}}

Answer 1

您可以使用Iterators迭代嵌套数组，例如

$iterator = new RecursiveIteratorIterator(
                new RecursiveArrayIterator($nestedArray), 
                RecursiveIteratorIterator::SELF_FIRST);

foreach($iterator as $key => val) {
    if($key === 'something') {
        echo $val;
    }
}

或者，请查看array_walk_recursive