Manuale PHP
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imagerotate

(PHP 4 >= 4.3.0, PHP 5)

imagerotate -- Rotate an image with a given angle

Descrizione

resource imagerotate ( resource source_image, float angle, int bgd_color [, int ignore_transparent] )

Rotates the source_image image using the given angle in degrees.

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.

Elenco dei parametri

source_image

The source image link

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).

Valori restituiti

Log delle modifiche

VersioneDescrizione
5.1.0 ignore_transparent was added.

Esempi

Esempio 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
header('Content-type: image/jpeg');

// Load
$source = imagecreatefromjpeg($filename);

// Rotate
$rotate = imagerotate($source, $degrees, 0);

// Output
imagejpeg($rotate);

Note

Nota: Questa funzione è disponibile soltanto se il PHP ` compilato con la libreria GD allegata.



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