(PHP 5 >= 5.2.2, PHP 7)
SplFileInfo::getRealPath — Gets absolute path to file
This method expands all symbolic links, resolves relative references and returns the real path to the file.
此函数没有参数。
Returns the path to the file, or FALSE if the file does not exist.
Example #1 SplFileInfo::getRealPath() example
<?php
$info = new SplFileInfo('/..//./../../'.__FILE__);
var_dump($info->getRealPath());
$info = new SplFileInfo('/tmp');
var_dump($info->getRealPath());
$info = new SplFileInfo('/I/Do/Not/Exist');
var_dump($info->getRealPath());
$info = new SplFileInfo('php://output');
var_dump($info->getRealPath());
$info = new SplFileInfo("");
var_dump($info->getRealPath());
?>
以上例程的输出类似于：
string(28) "/private/tmp/phptempfile.php" string(12) "/private/tmp" bool(false) bool(false) string(12) "/private/tmp"
Note that due to realpath caching this method will return false when the file has been renamed or unlinked by other processes.
Example:
<?php
$info = new SplFileInfo('example.php');
$info->getRealPath(); // /path/to/example.php
rename('example.php', 'foobar.php');
$info->getRealPath(); // false
?>