Image resize issue using GD - php

Question

I have successfully resized images using GD library. I resize any image to 350 x 250, the problem is tat some pictures don't look good (stretch) when they are resized as i am resizing them to a fixed size. I have a space of 350 x 250 where resize picture needs to be fit, I don't mind if the pic size is smaller than 350 x 250 as long as it does not stretch. How do i solve this problem?
$save = "$directory/" . $file_name; //This is the new file you saving
$file = "$directory/" . $file_name; //This is the original file
list($width, $height) = getimagesize($file) ;
$modwidth = 350;
if ($width > $height) {
$y = 0;
$x = ($width - $height) / 2;
$smallestSide = $height;
} else {
$x = 0;
$y = ($height - $width) / 2;
$smallestSide = $width;
}
$diff = $width / $modwidth;
$modheight = 250;
$tn = imagecreatetruecolor($modwidth, $modheight) ;
$image = imagecreatefromjpeg($file) ;
imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height);
imagejpeg($tn, $save, 100) ;

Answer 1

Try using this function I've written some time ago:
public function resize($img, $width, $height, $stretch = false)
{
$temp = imagecreatetruecolor($width, $height);
imagealphablending($temp, true);
imagesavealpha($temp, true);
$bg = imagecolorallocatealpha($temp, 0, 0, 0, 127); // Background color
imagefill($temp, 0, 0, $bg);
if ($stretch)
{
imagecopyresampled($temp, img, 0, 0, 0, 0, $width, $height, imagesx($img), imagesy($img));
}
else
{
if (imagesx($img) <= $width && imagesy($img) <= $height)
{
$fwidth = imagesx($img);
$fheight = imagesy($img);
}
else
{
$wscale = $width / imagesx($img);
$hscale = $height / imagesy($img);
$scale = min($wscale, $hscale);
$fwidth = $scale * imagesx($img);
$fheight = $scale * imagesy($img);
}
imagecopyresampled($temp,
$img,
($width - $fwidth) / 2, ($height - $fheight) / 2,
0, 0,
$fwidth, $fheight,
imagesx($img), imagesy($img)
);
}
return $temp;
}
if you say not to stretch the image, it will calculate a new size making it fit your new size.
use it as:
...
$image = imagecreatefromjpeg($file);
$resized = resize($image, 350, 250, false); // false = don't stretch
imagejpeg($resized, $save, 100);
...
now store $resized on the disk using imagepng() for example.