Rotate an image with a given angle

Descripción

resource imagerotate ( resource $image , float $angle , int $bgd_color [, int $ignore_transparent= 0 ] )

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.

Lista de parámetros

image: An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
angle: Rotation angle, in degrees.
bgd_color: Specifies the color of the uncovered zone after the rotation
ignore_transparent: If set and non-zero, transparent colors are ignored (otherwise kept).

Valores retornados

Registro de cambios

Versión	Descripción
5.1.0	`ignore_transparent` was added.

Ejemplos

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);
?>

El resultado del ejemplo seria algo similar a:

Notes

Note: Esta funcion esta disponible solamente si PHP se ha compilado con la version de las bibliotecas GD distribuidas con PHP.