imagerotate

(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)

imagerotate — Rotate an image with a given angle

Beschreibung

imagerotate(
    GdImage $image,
    float $angle,
    int $background_color,
    bool $ignore_transparent = false
): GdImage|false

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.

Parameter-Liste

image: Ein GdImage-Objekt, das von einer der Funktionen zur Bilderzeugung, z. B. imagecreatetruecolor(), zurückgegeben wurde.
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
ignore_transparent: This parameter is unused.

Rückgabewerte

Returns an image object for the rotated image, Bei einem Fehler wird false zurückgegeben..

Changelog

Version	Beschreibung
8.0.0	On success, this function returns a GDImage instance now; previously, a resource was returned.
8.0.0	`image` erwartet nun eine GdImage-Instanz; vorher wurde eine Ressource erwartet.
8.0.0	The unused `ignore_transparent` expects a bool now; previously it expected an int.

Beispiele

Beispiel #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);
?>