imagerectangle imagesavealpha Immagini PHP Manual imagerotate (PHP 4 >= 4.3.0, 5) — Rotate an image with a given angle Descrizione resource ( $source_image , float $angle int $bgd

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

Versione	Descrizione
5.1.0	`ignore_transparent` was added.

Esempi

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);
?>

Il precedente esempio visualizzerà qualcosa simile a:

Note

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

imagerotate