Php/docs/function.imageflip
imageflip
(PHP 5 >= 5.5.0, PHP 7)
imageflip — Flips an image using a given mode
说明
imageflip
( resource $image
, int $mode
) : bool
Flips the image
image using the given
mode
.
参数
image
由图象创建函数(例如imagecreatetruecolor())返回的图象资源。
mode
Flip mode, this can be one of the
IMG_FLIP_*
constants:Constant Meaning IMG_FLIP_HORIZONTAL
Flips the image horizontally. IMG_FLIP_VERTICAL
Flips the image vertically. IMG_FLIP_BOTH
Flips the image both horizontally and vertically.
返回值
成功时返回 true
, 或者在失败时返回 false
。
范例
Example #1 Flips an image vertically
This example uses the IMG_FLIP_VERTICAL
constant.
<?php// File$filename = 'phplogo.png';// Content typeheader('Content-type: image/png');// Load$im = imagecreatefrompng($filename);// Flip it verticallyimageflip($im, IMG_FLIP_VERTICAL);// Outputimagejpeg($im);imagedestroy($im);?>
以上例程的输出类似于:
Example #2 Flips the image horizontally
This example uses the IMG_FLIP_HORIZONTAL
constant.
<?php// File$filename = 'phplogo.png';// Content typeheader('Content-type: image/png');// Load$im = imagecreatefrompng($filename);// Flip it horizontallyimageflip($im, IMG_FLIP_HORIZONTAL);// Outputimagejpeg($im);imagedestroy($im);?>
以上例程的输出类似于: