<?php
header('Content-Type: application/json');
header('Content-Type: text/html;charset=utf-8');
header('Access-Control-Allow-Origin:*');

#$callback = $_GET["callback"];
#$data = array('a','b','c');
#echo $callback.'('.json_encode($data).')';


$ID = $_GET["key"];
if (strcasecmp("", $ID) != 0) {
    $ID = $_GET["key"];

    $file_path = "key.txt";
    if (file_exists($file_path)) {
        $file_arr = file($file_path);
        $flag = FALSE;
        for ($i = 0; $i < count($file_arr); $i++) {//逐行读取文件内容
            #if(1 == strcmp($file_arr[$i], $ID)){
            if (strcasecmp($file_arr[$i], $ID . "\n") == 0) {
                $flag = TRUE;
            }
        }
    }

    if ($flag == FALSE) {
        file_put_contents("key.txt", $ID . "\n", FILE_APPEND);
    }

}


?>