(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
imagerotate — Rotate an image with a given angle
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.
imageUna risorsa immagine, restituita da una delle funzioni di creazione immagine, come imagecreatetruecolor().
angleRotation angle, in degrees. The rotation angle is interpreted as the number of degrees to rotate the image anticlockwise.
background_colorSpecifies the color of the uncovered zone after the rotation
Returns an image object for the rotated image, o false in caso di fallimento.
| Versione | Descrizione |
|---|---|
| 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.
|
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:
Nota:
Questa funzione è influenzata dal metodo di interpolazione impostato da imagesetinterpolation().