2d

To draw 2D shapes in PHP, you can use the GD library, which is a built-in library for creating and manipulating images in PHP.

Here is an example of how to draw a square using the GD library in PHP:

$image = imagecreatetruecolor(100, 100); // Allocate a color for the square 
$color = imagecolorallocate($image, 255, 0, 0); // Draw the square
imagefilledrectangle($image, 0, 0, 99, 99, $color); // Output the image 
header('Content-Type: image/png'); 
imagepng($image); // Free up memory 
imagedestroy($image);

This will create a 100x100 pixel image with a red square drawn on it.

To draw other shapes, you can use the various drawing functions provided by the GD library. For example, to draw a triangle, you can use the imageline function to draw three lines connecting the vertices of the triangle:

$image = imagecreatetruecolor(100, 100); // Allocate a color for the triangle 
$color = imagecolorallocate($image, 255, 0, 0); // Draw the triangle
imageline($image, 50, 0, 0, 100, $color);
imageline($image, 50, 0, 100, 100, $color); 
imageline($image, 0, 100, 100, 100, $color); // Output the image
header('Content-Type: image/png'); 
imagepng($image); // Free up memory
imagedestroy($image);

You can also use the imagepolygon function to draw more complex shapes. For example, to create a star shape, you can use the following code:

$image = imagecreatetruecolor(200, 200); // Allocate a color for the star 
$color = imagecolorallocate($image, 255, 255, 0); // Define the points for the star shape 
$points = array( 100, 10, 130, 30, 170, 30, 120, 50, 140, 90, 100, 70,60, 90, 80, 50, 30, 30, 70, 30 ); // Draw the star imagepolygon($image, $points, 8, $color); // Output the image 
header('Content-Type: image/png'); 
imagepng($image); // Free up memory 
imagedestroy($image);