<?php
error_reporting(0);
$file_path = "data/images.json";
$memcache = new Memcache; 
$memcache->connect('127.0.0.1', 11211) or die ("Could not connect");
$json = $memcache->get('randUrlJson');
// echo "获取缓存";
if(trim($json) == "" || $json == false){
	if(file_exists($file_path)){
		$fp = fopen($file_path,"r");
		$str = fread($fp,filesize($file_path));
		$memcache->set('randUrlJson', $str);
		$json = $str;
		// echo "设置缓存";
	}
}
$res = json_decode($json,true);
$randNum = rand(0,sizeof($res)-1);
$url = $res[$randNum]['url'];
$name = $res[$randNum]['name'];
if($_GET['return'] == 'json'){
	$arr = ['code' => 0,'url' => $url,'name' => $name];
	echo json_encode($arr);
} else {
	// echo $url;
	header('Location:'.$url);
}