DirectoryIterator::getExtension()

(PHP 5>=5.3.6,PHP 7)

Gets the file extension

说明

publicDirectoryIterator::getExtension(void) : string

Retrieves the file extension.

参数

此函数没有参数。

返回值

Returns astringcontaining the file extension,or an emptystringif the file has no extension.

范例

Example#1DirectoryIterator::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 thepathinfo()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