1. PHP __file__ Constants (How to get the root directory)
The dirname (__file___) function returns the path where the script is located.
For example, the file b.php contains the following content:
$basedir = DirName (__file__);
?>
If b.php is referenced by a a.php file require or include in another directory.
The contents of the variable $basedir are also the path to the folder where the b.php resides.
Instead of becoming the directory where the a.php file resides.
DirName (__file__) typically returns a directory structure of the current directory of the file to the system root directory.
The current file name is not returned.
DirName (__file__) may also return one. (current directory)
[The reason is that the b.php file is under the default Web directory of the http.conf or PHP Configuration development environment.]
For example web_root: "c:/root/www/".
The b.php file path is: "c:/root/www/b.php". Using the method tip, if you repeat one at a time you can raise the directory up one level:
For example: $d = DirName (dirname (__file__));
The fact is that a directory to dirname () to do the parameters. Because DirName () returns the final directory without \ \ or
So when you reuse it, you can think of dirname () handling the lowest-level directory as a file name. Return as usual
The parent directory of the current directory. That way, you get the top level of the directory. Contains the file inclusion (DirName (__file__) that gets the top level of the directory. /.. /filename.php '); 2. How to combine php files and HTML files with if ($reguser! = "") {
echo "Submit Photo
";
echo "Log out";
}else{
echo "Login";
}
?>
The above describes the Ftisland hello Hello PHP to get the root directory of the __file__ constant, including the Ftisland hello hello content, want to be interested in PHP tutorial friends helpful.
