SplFileInfo::setInfoClass

(PHP 5 >= 5.1.2, PHP 7, PHP 8)

SplFileInfo::setInfoClass — Sets the class used with SplFileInfo::getFileInfo() and SplFileInfo::getPathInfo()

说明

public SplFileInfo::setInfoClass(string $class = SplFileInfo::class): void

Use this method to set a custom class which will be used when SplFileInfo::getFileInfo() and SplFileInfo::getPathInfo() are called. The class name passed to this method must be SplFileInfo or a class derived from SplFileInfo.

参数

class: The class name to use when SplFileInfo::getFileInfo() and SplFileInfo::getPathInfo() are called.

返回值

没有返回值。

示例

示例 #1 SplFileInfo::setFileClass() example

<?php
// Define a class which extends SplFileInfo
class MyFoo extends SplFileInfo {}

$info = new SplFileInfo('foo');
// Set the class name to use
$info->setInfoClass('MyFoo');
var_dump($info->getFileInfo());
?>

以上示例的输出类似于：

object(MyFoo)#2 (0) { }

参见

SplFileInfo::getFileInfo() - Gets an SplFileInfo object for the file

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Eugene Kunkel ¶

5 years ago

Be careful when using this method, as the functionality isn't exactly the same as instantiating the extending class directly. This can really trip you up if you're using type hints or instanceof checks.

<?php

class CustomFileInfo extends SplFileInfo
{
    public function getExtension()
    {
        $ext = strtolower(parent::getExtension());

        return 'jpeg' === $ext ? 'jpg' : $ext;
    }
}

$path = __DIR__ . '/foobar.jpeg';

$good = new CustomFileInfo($path);

echo "<pre>";
var_dump($good instanceof SplFileInfo);
var_dump($good instanceof CustomFileInfo);

$bad = new SplFileInfo($path);
$bad->setInfoClass('CustomFileInfo');

var_dump($bad instanceof SplFileInfo);
var_dump($bad instanceof CustomFileInfo);
echo "</pre>";

?>

Outputs:

bool(true)
bool(true)
bool(true)
bool(false)