( resource src_im, float angle, int bgd_color [, int ignore_transparent] )
Rotates the src_im image using a given
angle in degrees. bgd_color
specifies the color of the uncovered zone after the rotation.
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.
If ignore_transparent is set and non-zero,
transparent colors are ignored (otherwise kept). This parameter was added
in PHP 5.1.
Example 1. Rotate an image 180 degrees
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);
Note: This function is only available if
PHP is compiled with the bundled version of the GD library.