(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.
image
Una risorsa immagine, restituita da una delle funzioni di creazione immagine, come imagecreatetruecolor().
angle
Rotation angle, in degrees. The rotation angle is interpreted as the number of degrees to rotate the image anticlockwise.
background_color
Specifies 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);
// Free the memory
imagedestroy($source);
imagedestroy($rotate);
?>
Il precedente esempio visualizzerà qualcosa simile a:
Nota:
Questa funzione è influenzata dal metodo di interpolazione impostato da imagesetinterpolation().