Watermark image with resized png - PHP

<?php
ini_set('display_errors',1); // enable php error display for easy trouble shooting
error_reporting(E_ALL); // set error display to all

function resizePng($file, $newfile, $nWidth) {
    list($width, $height, $type, $attr) = getimagesize($file);
    $ratio = $width / $height;
    $nHeight = $nWidth * $ratio;
    $data = imagecreatefrompng($file);
    $newImg = imagecreatetruecolor($nWidth, $nHeight);
    imagealphablending($newImg, false);
    imagesavealpha($newImg,true);
    $transparent = imagecolorallocatealpha($newImg, 255, 255, 255, 127);
    imagefilledrectangle($newImg, 0, 0, $nWidth, $nHeight, $transparent);
    imagecopyresampled($newImg, $data, 0, 0, 0, 0, $nWidth, $nHeight, $width, $height);
    return imagepng($newImg, $newfile);
}

function watermark($watermark, $image, $newfile) {
    // Load the stamp and the photo to apply the watermark to
    $stamp = imagecreatefrompng($watermark);
    $data = imagecreatefromjpeg($image);
    // Set the margins for the stamp and get the height/width of the stamp image
    $marge_right = 10;
    $marge_bottom = 10;
    $sx = imagesx($stamp);
    $sy = imagesy($stamp);

    // Copy the stamp image onto our photo using the margin offsets and the photo
    // width to calculate positioning of the stamp.
    imagecopy($data, $stamp, imagesx($data) - $sx - $marge_right, imagesy($data) - $sy - $marge_bottom, 0, 0, imagesx($stamp), imagesy($stamp));

    return imagejpeg($data, $newfile, 90);
}

echo (resizePng('logo.png','nlogo.png', 200) && watermark('nlogo.png','photo.jpg','watermarked.jpg')) ? 'Completed' : 'Failed';
?>