Rotates the 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).
This example rotates an image 180 degrees - upside down.
// File and rotation
$filename = 'test.jpg';
$degrees = 180;
// Content type
$source = imagecreatefromjpeg($filename);
$rotate = imagerotate($source, $degrees, 0);
The above example will output something similar to: