note 39850 deleted from function.imagecopyresized by aidan

Note Submitter: schuele2 at istud dot fh-schmalkalden dot de ---- I needed a simple function, that resizes an uploaded image and writes it to a file. here's the code that worked for me: <?php // Resize an image if it exceeds a predefined size. function imageresize($filename,$maxwidth,$maxheight) { if (is_file($filename)) { /* check if the file is really one ;) */ $fd = @fopen($filename,"r"); $image_string = fread($fd,filesize($filename)); fclose($fd); unlink($filename); /* we need to delete the file, because we want to replace the original file with the resized one */ $im = ImageCreateFromString($image_string); $currwidth = ImageSX($im); $currheight = ImageSY($im); /* now we have to check if the image is higher than wider and larger than the defined size, then calculte it and resize it proportional */ if ($currwidth > $currheight && $currwidth > $maxwidth) { $percent = ($maxwidth * 100) / $currwidth; $nwidth = $maxwidth; $nheight = ($percent * $currheight) / 100; } elseif ($currwidth < $currheight && $currheight > $maxheight) { $percent = ($maxheight * 100) / $currheight; $nheight = $maxheight; $nwidth = ($percent * $currwidth) / 100; } $nwidth = intval($nwidth); $nheight = intval($nheight); /* ok. let's create the new smaller image with calculated size... */ $newim = imagecreate ($nwidth, $nheight); /* ...and put the lager image into the smaller one. */ imagecopyresized($newim,$im,0,0,0,0,$nwidth,$nheight,$width,$height); /* now save to file and clear up the memory ;) */ imagepng($newim,$filename); ImageDestroy($im); ImageDestroy($newim); /* if you want, use the returned HTML-Code and insert it into an <img>-tag */ return "width=\"".$nwidth."\" height=\"".$nheight."\""; } else { /* if the file wasn't a file ;) return false */ return false; } } ?> Have a nice time with it.