php - convert pdf into jpg using exec -

i want convert pdf-image .jpg-image.

i made convert.php can call filename of pdf file , convert jpg. call function this: http://www.example.ch/tools/img/cache/convert.php?f=mypdf.pdf

this looks this:

if ($f = @$_request['f']) {     $f = htmlspecialchars(urldecode($f));     $url  = 'http://www.example.ch/img/cache/'.$f;       $file = strtolower($f);      $ch = curl_init($url);     curl_setopt($ch, curlopt_returntransfer, 1);     curl_setopt($ch, curlopt_useragent, 'mozilla/5.0 (windows; u; windows nt 6.1; en-us; rv:1.9.1.2) gecko/20090729 firefox/3.5.2 gtb5');      $data = curl_exec($ch);      $retcode = curl_getinfo($ch, curlinfo_http_code);      curl_close($ch);     if ($retcode == 200) {         file_put_contents($file, $data);         $converted_filename = str_replace('.pdf', '.jpg', $file );         $cmd = 'convert '.$file.' '.$converted_filename;         exec('convert '.$file.' '.$converted_filename);         $fp = fopen($converted_filename, 'rb');          header('content-type: image/jpeg');         header("content-length: " . filesize($converted_filename));         fpassthru($fp);         exit;     } else {         header("http/1.0 404 not found");     }  } 

after done .jpg file size of 700kb in folder , can't open because corrupted. , html output like: image can't oppened because contains errors..

the best tool above imagemagic.

install image magic in system , refer link

convert pdf jpeg php , imagemagick

it easy these kind of things using imagemagic. refer link

http://php.net/manual/en/imagick.setimageformat.php

hope solve problem