ImageFunction.php

<?php

if(!isset($_SESSION['user']))
{
	header("Location: Login.php");
}
$res=mysqli_query($connection,"SELECT * FROM users WHERE user_id=".$_SESSION['user']);
$row=mysqli_fetch_array($res);

function resize($width, $height){
	/* Get original image x y*/
	list($w, $h) = getimagesize($_FILES['image']['tmp_name']);
	/* calculate new image size with ratio */
	$ratio = max($width/$w, $height/$h);
	$h = ceil($height / $ratio);
	$x = ($w - $width / $ratio) / 2;
	$w = ceil($width / $ratio);
	/* new file name */
	$path = 'uploads/'.$width.'x'.$height.'_'.$_FILES['image']['name'];
	/* read binary data from image file */
	$imgString = file_get_contents($_FILES['image']['tmp_name']);
	/* create image from string */
	$image = imagecreatefromstring($imgString);
	$tmp = imagecreatetruecolor($width, $height);
	imagecopyresampled($tmp, $image,
  	0, 0,
  	$x, 0,
  	$width, $height,
  	$w, $h);
	/* Save image */
	switch ($_FILES['image']['type']) {
		case 'image/jpeg':
			imagejpeg($tmp, $path, 100);
			break;
		case 'image/png':
			imagepng($tmp, $path, 0);
			break;
		case 'image/gif':
			imagegif($tmp, $path);
			break;
		default:
			exit;
			break;
	}

	return $path;
	/* cleanup memory */
	imagedestroy($image);
	imagedestroy($tmp);
}
?>