Detailed explanation of the example code of how to save remote images to a local folder in PHP-PHP Tutorial-php.cn

Remote pictures refer to data on the remote server that we can read and download through many functions of PHP. Here are two examples that can automatically download remote pictures and download and save them locally.

Function: PHP perfectly implements downloading remote pictures and saving them locally. When the saved file name is empty,remote fileoriginal name

Parameters: file url, save file directory, save file name, download method used

Can automatically identify the image type and save it accordingly

function getImage($url,$save_dir='',$filename='',$type=0){ if(trim($url)==''){ return array('file_name'=>'','save_path'=>'','error'=>1); } if(trim($save_dir)==''){ $save_dir='./'; } if(trim($filename)==''){//保存文件名 $ext=strrchr($url,'.'); if($ext!='.gif'&&$ext!='.jpg'){ return array('file_name'=>'','save_path'=>'','error'=>3); } $filename=time().$ext; } if(0!==strrpos($save_dir,'/')){ $save_dir.='/'; } //创建保存目录 if(!file_exists($save_dir)&&!mkdir($save_dir,0777,true)){ return array('file_name'=>'','save_path'=>'','error'=>5); } //获取远程文件所采用的方法 if($type){ $ch=curl_init(); $timeout=5; curl_setopt($ch,CURLOPT_URL,$url); curl_setopt($ch,CURLOPT_RETURNTRANSFER,1); curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout); $img=curl_exec($ch); curl_close($ch); }else{ ob_start(); readfile($url); $img=ob_get_contents(); ob_end_clean(); } //$size=strlen($img); //文件大小 $fp2=@fopen($save_dir.$filename,'a'); fwrite($fp2,$img); fclose($fp2); unset($img,$url); return array('file_name'=>$filename,'save_path'=>$save_dir.$filename,'error'=>0); }

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If it is not a picture, it will be automatically skipped

'; //如果返回值为真，这显示已经采集到服务器上的图片 else:echo "false"; endif; //否则，输出采集失败 ?>

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