note 86605 added to function.imagecreatefromjpeg

This code will allow you to resize any image (jpg, gif or png). It will even work with alpha transparency on pngs. It will limit both dimensions so that neither is higher than requested $thumb_width and preserve aspect ratio as well. I searched for a very long time before finding this, I have made a few personal changes such as those listed above. Credit goes to "vandai" on www.akemapa.com. <?php function resize($img, $thumb_width, $newfilename) { $max_width=$thumb_width; //Check if GD extension is loaded if (!extension_loaded('gd') && !extension_loaded('gd2')) { trigger_error("GD is not loaded", E_USER_WARNING); return false; } //Get Image size info list($width_orig, $height_orig, $image_type) = getimagesize($img); switch ($image_type) { case 1: $im = imagecreatefromgif($img); break; case 2: $im = imagecreatefromjpeg($img); break; case 3: $im = imagecreatefrompng($img); break; default: trigger_error('Unsupported filetype!', E_USER_WARNING); break; } /*** calculate the aspect ratio ***/ $aspect_ratio = (float) $height_orig / $width_orig; /*** calulate the thumbnail width based on the height ***/ $thumb_height = round($thumb_width * $aspect_ratio); while($thumb_height>$max_width) { $thumb_width-=10; $thumb_height = round($thumb_width * $aspect_ratio); } $newImg = imagecreatetruecolor($thumb_width, $thumb_height); /* Check if this image is PNG or GIF, then set if Transparent*/ if(($image_type == 1) OR ($image_type==3)) { imagealphablending($newImg, false); imagesavealpha($newImg,true); $transparent = imagecolorallocatealpha($newImg, 255, 255, 255, 127); imagefilledrectangle($newImg, 0, 0, $thumb_width, $thumb_height, $transparent); } imagecopyresampled($newImg, $im, 0, 0, 0, 0, $thumb_width, $thumb_height, $width_orig, $height_orig); //Generate the file, and rename it to $newfilename switch ($image_type) { case 1: imagegif($newImg,$newfilename); break; case 2: imagejpeg($newImg,$newfilename); break; case 3: imagepng($newImg,$newfilename); break; default: trigger_error('Failed resize image!', E_USER_WARNING); break; } return $newfilename; } echo resize("test4.png", 120, "thumb_test4.png") ?> ---- Server IP: 92.48.74.199 Probable Submitter: 82.39.112.228 ---- Manual Page -- http://www.php.net/manual/en/function.imagecreatefromjpeg.php Edit -- https://master.php.net/note/edit/86605 Del: integrated -- https://master.php.net/note/delete/86605/integrated Del: useless -- https://master.php.net/note/delete/86605/useless Del: bad code -- https://master.php.net/note/delete/86605/bad+code Del: spam -- https://master.php.net/note/delete/86605/spam Del: non-english -- https://master.php.net/note/delete/86605/non-english Del: in docs -- https://master.php.net/note/delete/86605/in+docs Del: other reasons-- https://master.php.net/note/delete/86605 Reject -- https://master.php.net/note/reject/86605 Search -- https://master.php.net/manage/user-notes.php