imagecreatefromjpeg($file_name): failed to open stream - php

Question

Hello everyone I am trying to add watermark to the uploaded images in WordPressbut when I use imagecreatefromjpeg($file_name) it throws this warning
Warning: imagecreatefromjpeg('file_name'): failed to open stream: HTTP request failed! HTTP/1.1 401 Unauthorized.
Here is the code I am using.
add_action('woocommerce_before_single_product_summary', 'adding_watermark', 20);
function adding_watermark() {
global $product;
$id = get_the_ID();
$name = get_the_title();
$link = get_the_permalink();
$padding = 3;
$opacity = 100;
$image = imagecreatefromjpeg($link);
echo '<pre>';
var_dump($image);
exit;
$watermark = imagestring($image, 1, 5, 5, 'TEST', '#fff');
$image_size = getimagesize($image);
$dest_x = $image_size[0] - $watermark_width - $padding;
$dest_y = $image_size[1] - $watermark_height - $padding;
imagecopymerge($name, $watermark, $dest_x, $dest_y, 0, 0, $watermark_width, $watermark_height, $opacity);
That var_dump() thing in the code always return bool(flase)
Can anyone give any hint why it is behaving so. Thank you in advacne.

Answer 1

Using the below code you can add watermark for your images,
//path to destination image
$destination_image = imagecreatefromjpeg('PATH/TO/DESTINATION/JPEG/FILE');
//path to watermark image
$watermark = imagecreatefrompng('PATH/TO/WATERMARK/PNG/FILE');
//calculate center position of watermark image
$watermark_left = (DST_IMAGE_WIDTH/2)-(WATERMARK_WIDTH/2); //watermark left
$watermark_bottom = (DST_IMAGE_HEIGHT/2)-(WATERMARK_HEIGHT/2); //watermark bottom
//use PHP imagecopy() to merge two images.
imagecopy($destination_image, $watermark, $watermark_left, $watermark_bottom, 0, 0, WATERMARK_WIDTH, WATERMARK_HEIGHT); //merge image
Source - https://www.sanwebe.com/2014/08/watermark-an-uploaded-image-with-php