imagerotate
(PHP 4 >= 4.3.0, PHP 5, PHP 7)
imagerotate — Rotate an image with a given angle
설명
$image
, float $angle
, int $bgd_color
[, int $ignore_transparent = 0
] )
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.
인수
-
image -
imagecreatetruecolor() 등의 이미지 생성 함수에서 반환한 이미지 자원.
-
angle -
Rotation angle, in degrees. The rotation angle is interpreted as the number of degrees to rotate the image anticlockwise.
-
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).
반환값
Returns an image resource for the rotated image, 실패 시 FALSE를 반환합니다.
변경점
| 버전 | 설명 |
|---|---|
| 5.5.0 | This function is now affected by the interpolation method set by the imagesetinterpolation() function. |
| 5.1.0 |
ignore_transparent was added.
|
예제
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);
?>
위 예제의 출력 예시:
주의
Note:
이 함수는 imagesetinterpolation()으로 설정한 보간 메소드에 영향을 받습니다.