imagerotate
(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
imagerotate — Rotate an image with a given angle
Description
GdImage
$image,float
$angle,int
$background_color,bool
$ignore_transparent = false): GdImage|false
Rotates the image image using the given
angle in degrees.
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
-
ignore_transparent -
This parameter is unused.
Return Values
Returns an image object for the rotated image, or false on failure.
Changelog
| Version | Description |
|---|---|
| 8.0.0 | On success, this function returns a GDImage instance now; previously, a resource was returned. |
| 8.0.0 |
image expects a GdImage
instance now; previously, a resource was expected.
|
| 8.0.0 |
The unused ignore_transparent expects a bool now;
previously it expected an int.
|
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().
See Also
- imagesetinterpolation() - Set the interpolation method
