PHP：删除指定数组元素

$arr = array(
    array("id"=>"1","name"=>"abc"),
    array("id"=>"2","name"=>"def"),
    array("id"=>"3","name"=>"ghi"),
);
foreach ($arr as $key=>$value){
    if($value['id'] == "2"){
        unset($arr[$key]);
    }
}
var_dump($arr);