//前端期望数据为json
header("Content-Type:application/json;charset=utf-8");
//post 请求 请求内容类型为 application/x-www-form-urlencoded 如果是 application/json 则需要另行处理 $_POST 数组不会被填充

//为了保持模拟的数据
session_start();

if ($_SESSION['emulate_data']) {
//已生成
} else {
$list = [];
//第一次会模拟个数据
for($i = 1; $i < 50; $i ++) {
$list[] = [
"id" => $i,"name" => substr(str_shuffle(implode('',range('a','z'))),5),"age" => mt_rand(10,30)
];
}
$_SESSION['emulate_data'] = $list;
}

$list_temp = [];
//检索
if (isset($_POST['search']) && !empty($_POST['search'])) {
foreach ($_SESSION['emulate_data'] as $key => $row) {
if (strpos($row['name'],$_POST['search']) !== false
|| strpos($row['age'],$_POST['search']) !== false) {
$list_temp[] = $_SESSION['emulate_data'][$key];
}
}
} else {
$list_temp = $_SESSION['emulate_data'];
}
//排序
if (isset($_POST['sort'])) {
$temp = [];
foreach ($list_temp as $row) {
$temp[] = $row[$_POST['sort']];
}
//PHP的多维排序
array_multisort($temp,$_POST['sort'] == 'name' ? SORT_STRING : SORT_NUMERIC,$_POST['order'] == 'asc' ? SORT_ASC : SORT_DESC,$list_temp
);
}

//分页时需要获取记录总数，键值为 total
$result["total"] = count($list_temp);
//根据传递过来的分页偏移量和分页量截取模拟分页 rows 可以根据前端的 dataField 来设置
$result["rows"] = array_slice($list_temp,$_POST['offset'],$_POST['limit']);

echo json_encode($result);