DirectoryIterator::getExtension()
(PHP 5>=5.3.6,PHP 7)
Gets the file extension
说明
public DirectoryIterator::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