file_get_contents とcurlを使用してコレクションを書き込む

function preg_substr($start, $end, $str) // 正则截取函数      
{      
    $temp = preg_split($start, $str);      
    $content = preg_split($end, $temp[1]);      
    return $content[0];      
}

function str_substr($start, $end, $str) // 字符串截取函数      
{      
    $temp = explode($start, $str, 2);      
    $content = explode($end, $temp[1], 2);      
    return $content[0];      
}

function writelog($str)
{
@unlink("log.txt");
$open=fopen("log.txt","a" );
fwrite($open,$str);
fclose($open);
}

function getImage($url, $filename='', $dirName, $fileType, $type=0)
{
    if($url == ''){return false;}
    //获取文件原文件名
    $defaultFileName = basename($url);
    //获取文件类型
    $suffix = substr(strrchr($url,'.'), 1);
    if(!in_array($suffix, $fileType)){
        return false;
    }
    //设置保存后的文件名
    $filename = $filename == '' ? time().rand(0,9).'.'.$suffix : $defaultFileName;
          
    //获取远程文件资源
    if($type){
        $ch = curl_init();
        $timeout = 5;
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
        $file = curl_exec($ch);
        curl_close($ch);
    }else{
        ob_start();
        readfile($url);
        $file = ob_get_contents();
        ob_end_clean();
    }
    //设置文件保存路径
    $dirName = $dirName.'/'.date('Y', time()).'/'.date('m', time()).'/'.date('d',time()).'/';
    if(!file_exists($dirName)){
        mkdir($dirName, 0777, true);
    }
    //保存文件
    $res = fopen($dirName.$filename,'a');
    fwrite($res,$file);
    fclose($res);
    return $dirName.$filename;
}