DirectoryIterator::getExtension
(PHP 5 >= 5.3.6, PHP 7, PHP 8)
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
示例 #1 DirectoryIterator::getExtension() example
<?php
$directory = new DirectoryIterator(__DIR__);
foreach ($directory as $fileinfo) {
if ($fileinfo->isFile()) {
echo $fileinfo->getExtension() . "\n";
}
}
?>
以上例程的输出类似于：
php txt jpg gz
注释
注意:
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
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