php页面api接口设置访问频率简单方法

admin

session_start();
if (isset($_SESSION['LAST_CALL'])) {
    $last = strtotime($_SESSION['LAST_CALL']);
    $curr = strtotime(date("Y-m-d h:i:s"));
    $sec =  abs($last - $curr);
    if ($sec <= 1) {
        $data = '访问频率超限';  // rate limit
        header('Content-Type: application/json');
        die (json_encode($data,JSON_UNESCAPED_UNICODE));//另外如果需要返回中文提示，json_encode需要加个选项,否则web页面显示转译的unicode字符
    }
}
$_SESSION['LAST_CALL'] = date("Y-m-d h:i:s");

// normal usage
$data = "接口返回正常数据";
header('Content-Type: application/json');
die(json_encode($data));