note 68631 added to function.imagecopyresized

The function below will resize an image based on max width and height, then it will create a thumbnail image from the center of the resized image of a width and height specified. <?php /********************************************************** * function resizejpeg: * * = creates a resized image based on the max width * specified as well as generates a thumbnail from * a rectangle cut from the middle of the image. * * @dir = directory image is stored in * @img = the image name * @max_w = the max width of the resized image * @max_h = the max height of the resized image * @th_w = the width of the thumbnail * @th_h = the height of the thumbnail * **********************************************************/ function resizejpeg($dir, $img, $max_w, $max_h, $th_w, $th_h) { // get original images width and height list($or_w, $or_h, $or_t) = getimagesize($dir.$img); // make sure image is a jpeg if ($or_t == 2) { // obtain the image's ratio $ratio = ($or_h / $or_w); // original image $or_image = imagecreatefromjpeg($dir.$img); // resize image if ($or_w > $max_w || $or_h > $max_h) { // first resize by width (less than $max_w) if ($or_w > $max_w) { $rs_w = $max_w; $rs_h = $ratio * $max_h; } else { $rs_w = $or_w; $rs_h = $or_h; } // then resize by height (less than $max_h) if ($rs_h > $max_h) { $rs_w = $max_w / $ratio; $rs_h = $max_h; } // copy old image to new image $rs_image = imagecreatetruecolor($rs_w, $rs_h); imagecopyresampled($rs_image, $or_image, 0, 0, 0, 0, $rs_w, $rs_h, $or_w, $or_h); } else { $rs_w = $or_w; $rs_h = $or_h; $rs_image = $or_image; } // generate resized image imagejpeg($rs_image, $dir.$img, 100); $th_image = imagecreatetruecolor($th_w, $th_h); // cut out a rectangle from the resized image and store in thumbnail $new_w = (($rs_w / 4)); $new_h = (($rs_h / 4)); imagecopyresized($th_image, $rs_image, 0, 0, $new_w, $new_h, $rs_w, $rs_h, $rs_w, $rs_h); // generate thumbnail imagejpeg($th_image, $dir.'thumb_'.$img, 100); return true; } // Image type was not jpeg! else { return false; } } ?> Example: <?php $dir = './'; $img = 'test.jpg'; resizejpeg($dir, $img, 600, 600, 300, 150); ?> The example would resize the image 'test.jpg' into something 600x600 or less (1:1 ratio) and create the file 'thumb_test.jpg' at 300x150. ---- Server IP: 216.194.113.175 Probable Submitter: 68.187.50.149 ---- X-Spam-Status: No, hits=3.1 required=5.0 tests=DATE_MISSING,FROM_NO_LOWER autolearn=no version=2.64 ---- Manual Page -- http://www.php.net/manual/en/function.imagecopyresized.php Edit -- https://master.php.net/note/edit/68631 Del: integrated -- https://master.php.net/note/delete/68631/integrated Del: useless -- https://master.php.net/note/delete/68631/useless Del: bad code -- https://master.php.net/note/delete/68631/bad+code Del: spam -- https://master.php.net/note/delete/68631/spam Del: non-english -- https://master.php.net/note/delete/68631/non-english Del: in docs -- https://master.php.net/note/delete/68631/in+docs Del: other reasons-- https://master.php.net/note/delete/68631 Reject -- https://master.php.net/note/reject/68631 Search -- https://master.php.net/manage/user-notes.php