note 59787 added to function.imagecreatefromgif

I have written this code to detect if a gif file is animated or not. I thought I would share it :-) <?php function is_ani($filename) { $filecontents=file_get_contents($filename); $str_loc=0; $count=0; while ($count < 2) # There is no point in continuing after we find a 2nd frame { $where1=strpos($filecontents,"\x00\x21\xF9\x04",$str_loc); if ($where1 === FALSE) { break; } else { $str_loc=$where1+1; $where2=strpos($filecontents,"\x00\x2C",$str_loc); if ($where2 === FALSE) { break; } else { if ($where1+8 == $where2) { $count++; } $str_loc=$where2+1; } } } if ($count > 1) { return(true); } else { return(false); } } exec("ls *gif" ,$allfiles); foreach ($allfiles as $thisfile) { if (is_ani($thisfile)) { echo "$thisfile is animated<BR>\n"; } else { echo "$thisfile is NOT animated<BR>\n"; } } ?> It could quite easily be modified to count the number of frames if you required. ---- Manual Page -- http://www.php.net/manual/en/function.imagecreatefromgif.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+59787 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+59787&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+59787&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+59787&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+59787&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+59787&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+59787&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+59787&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+59787&report=yes Search -- http://master.php.net/manage/user-notes.php