DirectoryIterator::getExtension
(PHP 5 >= 5.3.6, PHP 7, PHP 8)
DirectoryIterator::getExtension — Gets the file extension
說明
public DirectoryIterator::getExtension(): string
Retrieves the file extension.
參數
此函式沒有參數。
返回值
Returns a string containing the file extension, or an empty string if the file has no extension.
範例
示例 #1 DirectoryIterator::getExtension() example
<?php
$directory = new DirectoryIterator(__DIR__);
foreach ($directory as $fileinfo) {
if ($fileinfo->isFile()) {
echo $fileinfo->getExtension() . "\n";
}
}
?>
以上例程的輸出類似於：
php txt jpg gz
註釋
注意:
Another way of getting the extension is to use the pathinfo() function.
<?php
$extension = pathinfo($fileinfo->getFilename(), PATHINFO_EXTENSION);
?>
參見
- DirectoryIterator::getFilename() - Return file name of current DirectoryIterator item
- DirectoryIterator::getBasename() - Get base name of current DirectoryIterator item
- pathinfo() - 返回檔案路徑的資訊