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Image Resize

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This function will resize any input file restricting the width and height to be no more than the specified pixels, and output a binary stream.

function resize_jpg($inputFilename, $new_side){
	$imagedata = getimagesize($inputFilename);
	$w = $imagedata[0];
	$h = $imagedata[1];
	
	if ($h > $w) {
		$new_w = ($new_side / $h) * $w;
		$new_h = $new_side;	
	} else {
		$new_h = ($new_side / $w) * $h;
		$new_w = $new_side;
	}
	
	$im2 = ImageCreateTrueColor($new_w, $new_h);
	$image = ImageCreateFromJpeg($inputFilename);
	imagecopyResampled ($im2, $image, 0, 0, 0, 0, $new_w, $new_h, $imagedata[0], $imagedata[1]);
	return $im2;
}
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