DirectoryIterator::getExtension

(PHP 5 >= 5.3.6)

DirectoryIterator::getExtension — Gets the file extension

说明

public string DirectoryIterator::getExtension ( void )

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