imageflip

    (PHP 5 >= 5.5.0, PHP 7, PHP 8)

    imageflip — Flips an image using a given mode

    说明

    imageflip(GdImage $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 GdImage 对象。

    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。

    更新日志

    版本 说明
    8.0.0 image 现在需要 GdImage 实例；之前需要有效的 gd resource。

    示例

    示例 #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($im, IMG_FLIP_VERTICAL);

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

    以上示例的输出类似于：

    Output of example: Vertically flipped image

    示例 #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($im, IMG_FLIP_HORIZONTAL);

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

    以上示例的输出类似于：

    Output of example: Horizontally flipped image

    Improve This Page

    Learn How To Improve This Page • Submit a Pull Request • Report a Bug
    ＋add a note

    User Contributed Notes

    There are no user contributed notes for this page.
    To Top