SplFileInfo::getExtension

    (PHP 5 >= 5.3.6, PHP 7, PHP 8)

    SplFileInfo::getExtension — Gets the file extension

    说明

    publicSplFileInfo::getExtension(): string

    Retrieves the file extension.

    参数

    此函数没有参数。

    返回值

    Returns a string containing the file extension, or an empty string if the file has no extension.

    示例

    示例 #1 SplFileInfo::getExtension() example

    <?php

    $info     = new SplFileInfo('foo.txt');
    var_dump($info->getExtension());

    $info = new SplFileInfo('photo.jpg');
    var_dump($info->getExtension());

    $info = new SplFileInfo('something.tar.gz');
    var_dump($info->getExtension());

    ?>

    以上示例会输出：

    string(3) "txt" string(3) "jpg" string(2) "gz"

    注释

    注意:

    Another way of getting the extension is to use the pathinfo() function.

    <?php
    $extension     = pathinfo($info->getFilename(), PATHINFO_EXTENSION);
    ?>

    参见

    To Top