Php/docs/directoryiterator.getextension

• PHP Manual
• DirectoryIterator
• Gets the file extension

DirectoryIterator::getExtension

(PHP 5 >= 5.3.6, PHP 7)

DirectoryIterator::getExtension — Gets the file extension

说明

public DirectoryIterator::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.

范例

Example #1 DirectoryIterator::getExtension() example

<?php$directory = new DirectoryIterator(__DIR__);foreach ($directory as $fileinfo) {    if ($fileinfo->isFile()) {        echo $fileinfo->getExtension() . "\n";    }}?>

以上例程的输出类似于：

php
txt
jpg
gz

注释

Note:

This method is only available as of PHP 5.3.6. Another way of getting the extension is to use the pathinfo() function.

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

参见

• DirectoryIterator::getFilename() - Return file name of current DirectoryIterator item
• DirectoryIterator::getBasename() - Get base name of current DirectoryIterator item
• pathinfo() - 返回文件路径的信息