Methods for implementing Chinese watermarks in php gd library

When we upload images on a website, many users need to add watermarks to images. Next we will explain in detail

Sample Code for implementing a Chinese watermark in the php gd library:

1. <? Php
2. $ Im = imagecreatetruecolor (100,100 );
3. // Create a true color image
4. $ White = imagecolorallocate ($ im, 255,235,255 );
5. // Assign color to an image, which is different from my design knowledge ..
   I have never thought of assigning colors to the specified image logo during painting.
   .. This function is often mixed with the imagefill function.
6. Imagefill ($ im, 0, 0, $ white );
7. // Fill the area
8. $ Black = imagecolorallocate ($ im, 250,50, 50 );
9. // Assign color to an image
10. Imagerectangle ($ im, 5, 5, 50, 50, $ black );
11. // Draw a rectangle
12. Header ("Content-type: image/jpeg ");
13. // Send the header and use imagejpeg to directly output the image in the browser.
14. Imagejpeg ($ im, 'imagename', 100 );
15. // Output an image name and quality
16. Imagedestroy ($ im );
17. // Release the memory associated with the image. Image
    Is the image identifier returned by the image creation function.
18. ?>

Implement Chinese watermark code in php gd library

 
 

  
  
<? Php
  
  
Header ("Content-type: image/png ");
  
  
/* Notify the browser to output the image */
  
  
$ Im = imagecreate (400,300 );
  
  
/* Define the image size */
  
  
$ Gray = ImageColorAllocate ($ im, 235,235,235 );
  
  
$ Pink = ImageColorAllocate ($ im, 255,128,255 );
  
  
/*
  
  
$ Fontfile = "C: WINDOWSFontsSIMHEI. TTF ";
  
  
Sorry, this sentence is always stuck and lost after submission. I don't know what's going on.
The comments to be tested are now tested.
  
  
*/
  
  
/* $ Fontfile font path, depending on the operating system, can be
Simhei. ttf (), SIMKAI. TTF (),
SIMFANG. TTF (), SIMSUN. TTC (&)
Chinese fonts supported by GD */
  
  
$ Str = iconv ('gb2312', 'utf-8', 'Chinese watermark !!! ');
  
  
/* Convert the gb2312 character set to the UTF-8 Character Set */
  
  
ImageTTFText ($ im, 30, 0, 50,140,
$ Pink, $ fontfile, $ str );
  
  
/* Add a Chinese watermark */
  
  
Imagepng ($ im );
  
  
ImageDestroy ($ im );
  
  
?>
 
 

The above is a summary of the methods for implementing Chinese watermarks in the php gd library.