note 84516 added to function.imagecopyresampled

Wrote a function for sanitising user uploaded images. It saves the native image in size roughly 800x600 so it still fits on most screens when opened, makes a desired size thumbnail and turns all images into high quality jpegs for smaller bandwidth use. Thumbnails are made in a similar way a designer would make them in photoshop, first resize the most troublesome dimension to desired size, then crop the rest out so the image retains proportions and most of it ends up in the thumbnail. <?php // $image is $_FILES[ <image name> ] // $imageId is the id used in a database or wherever for this image // $thumbWidth and $thumbHeight are desired dimensions for the thumbnail function processImage( $image, $imageId, $thumbWidth, $thumbHeight ) { $type = $image[ 'type' ]; $galleryPath = 'images/collection/'; if ( strpos( $type, 'image/' ) === FALSE ) { // not an image return FALSE; } $type = str_replace( 'image/', '', $type ); $createFunc = 'imagecreatefrom' . $type; $im = $createFunc( $image[ 'tmp_name' ] ); $size = getimagesize( $image[ 'tmp_name' ] ); $w = $size[ 0 ]; $h = $size[ 1 ]; if ( $w > 800 || $h > 600 ) { // we make sure the image isn't too huge if ( $w > 800 ) { $nw = 800; $nh = ceil( $nw*($h/$w) ); }elseif( $h > 600 ) { $nh = 600; $nw = ceil( $nh*($w/$h) ); } $im2 = imagecreatetruecolor( $nw, $nh ); imagecopyresampled( $im2, $im, 0, 0, 0, 0, $nw, $nh, $w, $h ); imagedestroy( $im ); $im = $im2; $w = $nw; $h = $nh; } // create thumbnail $tw = $thumbWidth; $th = $thumbHeight; $imT = imagecreatetruecolor( $tw, $th ); if ( $tw/$th > $th/$tw ) { // wider $tmph = $h*($tw/$w); $temp = imagecreatetruecolor( $tw, $tmph ); imagecopyresampled( $temp, $im, 0, 0, 0, 0, $tw, $tmph, $w, $h ); // resize to width imagecopyresampled( $imT, $temp, 0, 0, 0, $tmph/2-$th/2, $tw, $th, $tw, $th ); // crop imagedestroy( $temp ); }else { // taller $tmpw = $w*($th/$h ); $imT = imagecreatetruecolor( $tmpw, $th ); imagecopyresampled( $imT, $im, 0, 0, 0, 0, $tmpw, $h, $w, $h ); // resize to height imagecopyresampled( $imT, $temp, 0, 0, $tmpw/2-$tw/2, 0, $tw, $th, $tw, $th ); // crop imagedestroy( $temp ); } // save the image imagejpeg( $im, $galleryPath . $imgid . '.jpg', 100 ); imagejpeg( $imT, $galleryPath . $imgid . '_thumb.jpg', 100 ); } ?> ---- Server IP: 213.250.2.28 Probable Submitter: 212.18.43.58 ---- Manual Page -- http://www.php.net/manual/en/function.imagecopyresampled.php Edit -- https://master.php.net/note/edit/84516 Del: integrated -- https://master.php.net/note/delete/84516/integrated Del: useless -- https://master.php.net/note/delete/84516/useless Del: bad code -- https://master.php.net/note/delete/84516/bad+code Del: spam -- https://master.php.net/note/delete/84516/spam Del: non-english -- https://master.php.net/note/delete/84516/non-english Del: in docs -- https://master.php.net/note/delete/84516/in+docs Del: other reasons-- https://master.php.net/note/delete/84516 Reject -- https://master.php.net/note/reject/84516 Search -- https://master.php.net/manage/user-notes.php