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Webradiance > Web Development Forum > PHP

Resize Image Function

A simple function that resizes an image

Resize Image Function, A simple function that resizes an image

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locateSTYLE View Member Profile Find Member's Posts	Dec 1 2008, 04:26 PM Post #1
W.R. Private Group: Members Posts: 18 Joined: 26-September 08 From: Dallas, TX Member No.: 1,191	Here's a simple little function I've created that resizes images using PHP's GD Image Library. I made it as simple and easy to use as I could think of. I'd love to hear of any improvements or suggestions. I use this function quite a lot to create thumbnails on the fly without actually saving a new image. Here's the function: CODE <? function image($id, $quality, $width, $height, $directory) { if(file_exists($directory."/".$id.".jpg")) { $ext = ".jpg"; } elseif(file_exists($directory."/".$id.".gif")) { $ext = ".gif"; } elseif(file_exists($directory."/".$id.".png")) { $ext = ".png"; } elseif(file_exists($directory."/".$id.".bmp")) { $ext = ".bmp"; } $file = $directory."/".$id.$ext; if(file_exists($file)) { header('Content-type: image/jpeg'); list($imgWidth, $imgHeight) = getimagesize($file); $modHeight = $width * $imgHeight; $modHeight = $modHeight / $imgWidth; $modWidth = $width; if($modHeight < $height) { $modWidth = $height * $imgWidth; $modWidth = $modWidth / $imgHeight; $modHeight = $height; } $image = imagecreatetruecolor($modWidth, $modHeight); $source = imagecreatefromjpeg($file); imagecopyresized($image, $source, 0, 0, 0, 0, $modWidth, $modHeight, $imgWidth, $imgHeight); imagejpeg($image, NULL, $quality); } else { die("Image not found."); } } image(strip_tags(addslashes(trim($_GET['id']))), strip_tags(addslashes(trim($_GET['q']))), strip_tags(addslashes(trim($_GET['w']))), strip_tags(addslashes(trim($_GET['h']))), strip_tags(addslashes(trim($_GET['d'])))); ?> Save the following code as "image.php." To use it simply call the HTML img tag to the fucntion. CODE <img src="image.php?id=1&q=100&w=150&h=150&d=images" alt="" /> Here's what the variables encoded in the URL mean: q - Quality (1-100) w - Width (px) h - Height (px) d - Directory (location of where the image is located) id - ID (The filename without the extension ) -------------------- locateSTYLE \| Design Community Free Website Templates, Stock Images and affordable hosting. DesignsByBAM \| Innovative Kitchen Design Young College Singles \| Find your perfect match for FREE! toughSEARCH \| 100% Free Online Personals Free Online Dating

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