imageflip

(PHP 5 >= 5.5.0)

imageflipFlips an image using a given mode

说明

bool imageflip ( resource $image , int $mode )

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 type
header('Content-type: image/png');

// Load
$im imagecreatefrompng($filename);

// Flip it vertically
imageflip($imIMG_FLIP_VERTICAL);

// Output
imagejpeg($im);
imagedestroy($im);
?>

以上例程的输出类似于:

Output of example: Vertically flipped image

Example #2 Flips the image horizontally

This example uses the IMG_FLIP_HORIZONTAL constant.

<?php
// File
$filename 'phplogo.png';

// Content type
header('Content-type: image/png');

// Load
$im imagecreatefrompng($filename);

// Flip it horizontally
imageflip($imIMG_FLIP_HORIZONTAL);

// Output
imagejpeg($im);
imagedestroy($im);
?>

以上例程的输出类似于:

Output of example: Horizontally flipped image

注释

Note: 此函数仅在与 GD 库捆绑编译的 PHP 版本中可用。

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