imagerotate

Rotate an image with a given angle

Description

GdImagefalse imagerotate(GdImage $image, float $angle, int $background_color)

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

Return Values

Returns an image object for the rotated image, or false on failure.

Changelog

Version Description
8.3.0 The unused ignore_transparent has been completely removed.
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 valid gd 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:

Output of example : Rotate an image 180 degrees

Notes

Note:

This function is affected by the interpolation method set by imagesetinterpolation.

See Also

  • imagesetinterpolation