(PHP 5 >= 5.1.2, PHP 7)
SplFileInfo::isFile — Tells if the object references a regular file
Checks if the file referenced by this SplFileInfo object exists and is a regular file.
此函数没有参数。
Returns TRUE if the file exists and is a regular file (not a link), FALSE otherwise.
Example #1 SplFileInfo::isFile() example
<?php
$info = new SplFileInfo(__FILE__);
var_dump($info->isFile());
$info = new SplFileInfo(dirname(__FILE__));
var_dump($info->isFile());
?>
以上例程的输出类似于：
bool(true) bool(false)
Documentation is a bit misleading.
SplFileInfo->isFile() and other classes (e.g. DirectoryIterator->isFile()) return TRUE for symlinks of files. Better use getType() method instead, which returns 'link' for symlinks.
This was reported long time ago - https://bugs.php.net/bug.php?id=72364 , but docs are still not fixed.