PHP Image Resizing

Question

I\'ve got a script that uploads files to the server as well as adds the filename to a database, but what I\'d like to do it restrict the maximum dimensions of the image befo

Answer 1

I used in the past this function to generate thumbnails that fit in given dimensions keeping aspect ratio, maybe you can use it somehow:

function resize_img_nofill($src_name,$dst_name,$width,$height,$dontExpand=false) {
        $MAGIC_QUOTES = set_magic_quotes_runtime();
        set_magic_quotes_runtime(0);

        $type =  strtolower(substr(strrchr($src_name,"."),1));

        if($type == "jpg") {
            $src = imagecreatefromjpeg($src_name);
        } else if($type == "png") {
            $src = imagecreatefrompng($src_name);    
        } else if($type == "gif") {
            $src = imagecreatefromgif($src_name);    
        } else {
                if($src_name != $dst_name) copy($src_name,$dst_name);
                set_magic_quotes_runtime($MAGIC_QUOTES);
                return;
        }



        $d_width = $s_width = imagesx($src);
        $d_height = $s_height = imagesy($src);

        if($s_width*$height > $width*$s_height && (!$dontExpand || $width < $s_width)) {
            $d_width = $width;
            $d_height = (int)round($s_height*$d_width/$s_width);
        } else if(!$dontExpand || $height < $s_height) {
            $d_height = $height;
            $d_width = (int)round($s_width*$d_height/$s_height);
        }

        if($s_width != $d_width || $s_height != $d_height) {

                if($type == "jpg") {
                        $dst = imagecreatetruecolor($d_width,$d_height);
                } else if($type == "png") {
                $dst = imagecreate($d_width,$d_height);
                } else if($type == "gif") {
                $dst = imagecreate($d_width,$d_height);
                } 

                $white = imagecolorallocate($dst,255,255,255);
                imagefilledrectangle($dst,0,0,$d_width,$d_height,$white);
                imagecopyresampled($dst,$src,0,0,0,0,$d_width,$d_height,$s_width,$s_height);

                if($type == "jpg") 
                imagejpeg($dst,$dst_name, 80);  
                else if($type == "png")
                imagepng($dst,$dst_name);       
                else if($type == "gif")
                imagegif($dst,$dst_name);       

                imagedestroy($dst);
                imagedestroy($src);
        } else {
                copy($src_name,$dst_name);
        }


        set_magic_quotes_runtime($MAGIC_QUOTES);
        return array($d_width,$d_height);
}