PHP下载远程图片的3个方法

1。使用file_get_contentsfunctiondlfile($file_url,$save_to){$content=file_get_contents($file_url);file_put_contents($save_to,$content);}2.使用CURL函数dlfile($file_url,$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($downloaded_file);}3.使用fopen函数dlfile($file_url,$save_to){$in=fopen($file_url,"rb");//rb读为二进制二次制读取$out=fopen($save_to,"wb");//写为二进制二次制写入while($chunk=fread($in,8192)){fwrite($out,$块，8192）；}fclose($in);fclose($out);}