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Image Resize

DZone's Guide to

Image Resize

Free Resource
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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