addWaterMark.php

<?php

ob_start();

// Load the stamp and the photo to apply the watermark to
$logoImage = imagecreatefrompng('stamp.png');
$image = imagecreatefromjpeg('photo.jpg');
$new_name = 'abcdefg.jpg';

// $image = imagecreatefromjpeg( $new_name );
// $logoImage = imagecreatefrompng( $watermarksrc );
imagealphablending( $logoImage, true );

$imageWidth=imagesx($image);
$imageHeight=imagesy($image); 
$logoWidth=imagesx($logoImage);
$logoHeight=imagesy($logoImage);

imagecopy(
  $image,
  $logoImage,
  $imageWidth-$logoWidth, $imageHeight-$logoHeight,
  0, 0,
  $logoWidth, $logoHeight );

// Set type of image and send the output
// header("Content-type: image/jpeg");
imagepng( $image );
$img_data = ob_get_contents (); 
ob_end_clean (); 
$b_img = base64_encode( $img_data );/*display image with watermark */
// @imagepng( $image, $new_name );/* save image with watermark */

// Release memory
imagedestroy( $image );
imagedestroy( $imageLogo );

?>

<img src="data:image/jpeg;base64,<?php echo $b_img; ?>" alt="Image">