PHP把下载地址转换为迅雷、快车、QQ旋风下载链接

function zhuanhuan($url){
	if(empty($url)) return $result;
	$urlodd=explode('//',$url,2);
	$head=strtolower($urlodd[0]);
	$behind=$urlodd[1];
	if($head=="thunder:"){
		$url=substr(base64_decode($behind),2,-2);
	}else if($head=="flashget:"){
		$url1=explode('&',$behind,2);
		$url=substr(base64_decode($url1[0]),10,-10);
	}else if($head=="qqdl:"){
		$url=base64_decode($behind);
	}else if($head=="http:"||$head=="ftp:"||$head=="mms:"||$head=="rtsp:"||$head=="https:"){
		$url=array(
			'thunder'=>"thunder://".base64_encode("AA".$url."ZZ"),
			'flashget'=>"Flashget://".base64_encode("[FLASHGET]".$url."[FLASHGET]")."&aiyh",
			'qqdl'=>"qqdl://".base64_encode($url)
		);
	}else{
		return '';
	}
	return $url;
}