Php method for drawing a rectangle

This article mainly introduces the php method for drawing a rectangle, which involves the use of the imagerectangle method in the GD Library. For more information, see the example in this article. Share it with you for your reference. The specific implementation method is as follows:

The code is as follows:

<? Php
// 1. create a canvas
$ Im = imagecreatetruecolor (300,200); // create a real-color image. the default background is black and the image identifier is returned. Another function, imagecreate, is not recommended.
// 2. draw the desired image
$ Red = imagecolorallocate ($ im, 255, 0, 0); // create a color for use
Imagerectangle ($ im, 30,30, 240,140, $ red); // draw a rectangle. Parameter description: 30, 30 indicates the coordinate of the upper left corner of the rectangle; 240,140 indicates the coordinate of the lower right corner of the rectangle; $ red indicates the color.
// Imagefilledrectangle ($ im, 30, 30, 240,140, $ red); // filled rectangle
// 3. output image
Header ("content-type: image/png ");
Imagepng ($ im); // output to the page. If the second parameter [, $ filename] exists, the image is saved.
// 4. destroy images and release memory
Imagedestroy ($ im );
?>

I hope this article will help you with php programming.