(PHP 5 >= 5.1.2)
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)