PHP text watermark and PHP image watermark Implementation code (two kinds of watermark method) _php Tutorial

Text Watermark

Text watermark is to add text on the picture, the main use of GD library Imagefttext method, and the need for font files. As follows:

The implementation code is as follows:

Copy the Code code as follows:
$dst _path = ' dst.jpg ';

Create an instance of a picture
$DST = imagecreatefromstring (file_get_contents ($DST _path));

Make a text.
$font = './SIMSUN.TTC ';//font
$black = Imagecolorallocate ($DST, 0x00, 0x00, 0x00);//Font Color
Imagefttext ($DST, 0, $black, $font, ' happy programming ');

Output picture
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);

Image watermark

Image watermark is to add a picture on another picture, mainly using the GD library imagecopy and Imagecopymerge. As follows:

The implementation code is as follows:

Copy the Code code as follows:
$dst _path = ' dst.jpg ';
$src _path = ' src.jpg ';

Create an instance of a picture
$DST = imagecreatefromstring (file_get_contents ($DST _path));
$SRC = imagecreatefromstring (file_get_contents ($src _path));

Get the width height of the watermark picture
List ($src _w, $src _h) = getimagesize ($src _path);

The watermark picture is copied to the target image, and the last parameter 50 is the set transparency, which enables the translucent effect
Imagecopymerge ($DST, $SRC, ten, 0, 0, $src _w, $src _h, 50);
If the watermark picture itself has a transparent color, use the Imagecopy method
Imagecopy ($DST, $SRC, ten, 0, 0, $src _w, $src _h);

Output picture
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);

http://www.bkjia.com/PHPjc/621661.html www.bkjia.com true http://www.bkjia.com/PHPjc/621661.html techarticle Text watermark Text watermark is to add text on the picture, the main use of GD library Imagefttext method, and need font files. As follows: The implementation code is as follows: Copy code generation ...

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