1：file_get_contents,file_put_contents方式

<?phpfunctiondownload_remote_file($file_url,$save_to){$content=file_get_contents($file_url);file_put_contents($save_to,$content);}?>

用法：

<?phpdownload_remote_file('http://www.54ux.com/wp-content/themes/d-simple/img/thumbnail.jpg',realpath("./downloads").'/file.jpg');?>

2：curl方式

functiondownload_remote_file_with_curl($file_url,$save_to){$ch=curl_init();curl_setopt($ch,CURLOPT_POST,0);curl_setopt($ch,CURLOPT_URL,$file_url);curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);$file_content=curl_exec($ch);curl_close($ch);$downloaded_file=fopen($save_to,'w');fwrite($downloaded_file,$file_content);fclose($downloaded_file);}

用法：

<?phpdownload_remote_file_with_curl('http://www.54ux.com/wp-content/themes/d-simple/img/thumbnail.jpg',realpath("./downloads").'/file.jpg');?>

3：fopen方法

functiondownload_remote_file_with_fopen($file_url,$save_to){$in=fopen($file_url,"rb");$out=fopen($save_to,"wb");while($chunk=fread($in,8192)){fwrite($out,$chunk,8192);}fclose($in);fclose($out);}

用法：

<?phpdownload_remote_file_with_fopen('http://www.54ux.com/wp-content/themes/d-simple/img/thumbnail.jpg',realpath("./downloads").'/file.jpg');?>