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
| 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.