PHP 7.1.21 Released

DirectoryIterator::getExtension

(PHP 5 >= 5.3.6, PHP 7)

DirectoryIterator::getExtensionGets 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

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