imagerotate
Rotate an image with a given angle
Description
GdImagefalse imagerotate(GdImage $image
, float $angle
, int $background_color
)
The center of rotation is the center of the image, and the rotated
image may have different dimensions than the original image.
Parameters
-
image
-
A GdImage object, returned by one of the image creation functions,
such as imagecreatetruecolor.
-
angle
-
Rotation angle, in degrees. The rotation angle is interpreted as the
number of degrees to rotate the image anticlockwise.
-
background_color
-
Specifies the color of the uncovered zone after the rotation
Return Values
Returns an image object for the rotated image, or false
on failure.
Examples
Example #1 Rotate an image 180 degrees
This example rotates an image 180 degrees - upside down.
<?php
// File and rotation
$filename = 'test.jpg';
$degrees = 180;
// Content type
header('Content-type: image/jpeg');
// Load
$source = imagecreatefromjpeg($filename);
// Rotate
$rotate = imagerotate($source, $degrees, 0);
// Output
imagejpeg($rotate);
// Free the memory
imagedestroy($source);
imagedestroy($rotate);
?>
The above example will output
something similar to:
Notes
Note:
This function is affected by the interpolation method set by imagesetinterpolation.