PHP text watermark and PHP image watermark code examples

$dst_path = 'dst.jpg';
//Create an instance of the image
$dst = imagecreatefromstring(file_get_contents($dst_path));
//Place text
$font = './simsun.ttc' ;//Font
$black = imagecolorallocate($dst, 0x00, 0x00, 0x00);//Font color
imagefttext($dst, 13, 0, 20, 20, $black, $font, 'Happy Programming');
//Output images
list($dst_w, $dst_h, $dst_type) = getimagesize($dst_path);
switch ($dst_type) {
case 1://GIF
header('Content-Type: image/gif' );
imagegif($dst);
break;
case 2://JPG
header('Content-Type: image/jpeg');
imagejpeg($dst);
break;
case 3://PNG
header('Content-Type: image/png');
imagepng($dst);
break;
default:
break;
}
imagedestroy($dst);

Example 2, php image watermark Image watermark, add one image to another image, mainly use the imagecopy and imagecopymerge of the gd library.

Rendering:

Code:

$dst_path = 'dst.jpg';
$src_path = 'src.jpg';
//Instance of creating an image
$dst = imagecreatefromstring(file_get_contents($dst_path));
$src = imagecreatefromstring (file_get_contents($src_path));
//Get the width and height of the watermark image
list($src_w, $src_h) = getimagesize($src_path);
//Copy the watermark image to the target image, the last parameter 50 is Set transparency, here to achieve translucent effect
imagecopymerge($dst, $src, 10, 10, 0, 0, $src_w, $src_h, 50);
//If the watermark image itself has a transparent color, use the imagecopy method
 //imagecopy($dst, $src, 10, 10, 0, 0, $src_w, $src_h);
//Output image
list($dst_w, $dst_h, $dst_type) = getimagesize($dst_path);
 switch ($dst_type) {
case 1://GIF
header('Content-Type: image/gif');
imagegif($dst);
break;
case 2://JPG
header('Content- Type: image/jpeg');
imagejpeg($dst);
break;
case 3://PNG
header('Content-Type: image/png');
imagepng($dst);
break;
 default:
break;
}
imagedestroy($dst);
imagedestroy($src);