array_filter:自定义函数过滤数组中的值

php代码

$arr = [
	['id' => 1],
	['id' => 2],
	['id' => 3],
	['id' => 4],
];

$arr = array_filter($arr,function($var){
	if($var['id'] %2 ==0){
		return true;
	}
	return false;
});


echo '<pre>';
print_r($arr);

result:
Array
(
    [1] => Array
        (
            [id] => 2
        )

    [3] => Array
        (
            [id] => 4
        )

)