source_image image using the given
angle in degrees.
The center of rotation is the center of the image, and the rotated image is scaled down so that the whole rotated image fits in the destination image - the edges are not clipped.
The source image link
Rotation angle, in degrees.
Specifies the color of the uncovered zone after the rotation
If set and non-zero, transparent colors are ignored (otherwise kept).
Example 1. Rotate an image 180 degrees
This example rotates an image 180 degrees - upside down.
The above example will output something similar to:
Note: This function is only available if PHP is compiled with the bundled version of the GD library.