php unset() 函数

<?php

/**
 * User: Jack
 * Date: 2017/11/20
 * Time: 20:37
 */

$items_arr[] = array('name' => 'f1', 'age' => 23, 'approve_status' => 'instock');
$items_arr[] = array('name' => 'f2', 'age' => 21, 'approve_status' => 'instock');
$items_arr[] = array('name' => 'f3', 'age' => 23, 'approve_status' => 'instock');
$items_arr[] = array('name' => 'f4', 'age' => 23, 'approve_status' => 'onsale');


foreach ($items_arr as $k => $v) {
    if ($v['approve_status'] == 'instock') {
        unset($items_arr[$k]);
        continue;
    }
}

print_r($items_arr);