PHP's GD

GD Image Processing Technology

Extension=php_gd2.dll

Create a canvas

Canvas, a resource-based data, an actionable image resource

• Create canvas (New)
  Imagecreate (width,height) Creating a palette-based canvas
  Imagecreatetruecolor (width,height) Create a true color canvas
• Create a canvas based on a picture (open)
  Imagecreatefromjpeg (URL)
  Imagecreatefrompng (URL)
  Imagecreatefromgif (URL)

Manipulating the canvas

Assign color: If you need to use a color on the canvas, you should assign the color to the canvas first.
(color identification) = Imagecolorallocate (img,r,g,b)

Fill Canvas

Imagefill (img,x,y, color identification)

Output canvas

1, output to picture file
2, direct output, need to tell the browser output as Picture information (header ("content-type:image/png;") ）
Imagepng (Img[,url])
Imagejpeg ()
Imagegif ()

Destroying Canvas Resources

Imagedestroy (IMG)

    
     header('content-type:image/png');$img = imagecreate(300,300);$color = imagecolorallocate($img,223,22,44);imagefill($img,3,3,$color);imagepng($img);imagedestroy();?>

'). addclass (' pre-numbering '). Hide (); $ (this). addclass (' has-numbering '). Parent (). append ($numbering); for (i = 1; i <= lines; i++) {$numbering. Append ($ ('

'). Text (i)); }; $numbering. FadeIn (1700); }); });

The above describes the PHP gd, including aspects of the content, I hope that the PHP tutorial interested in a friend helpful.

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