Example of getting the current path and directory with PHP_PHP Tutorial

/**
* PHP obtain path or directory implementation
* @link http://www.45it.com
​*/

//Magic variable, get the absolute path of the current file
echo "__FILE__: ========> ".__FILE__;
echo '
';

//Magic variable, get the directory of the current script
echo "__DIR__: ========> ".__DIR__;
echo '
';

//dirname returns the directory part of the path, dirname(__FILE__) is equivalent to __DIR__
echo "dirname(__FILE__): ========> ".dirname(__FILE__);
echo '
';

//The results of $_SERVER['PHP_SELF'] and $_SERVER['SCRIPT_NAME'] are generally the same. They both obtain the file name of the current script
//There is only a difference when php is run in cgi mode, but now it is almost impossible to find php running in cgi mode
echo '$_SERVER["PHP_SELF"]: ========> '.$_SERVER['PHP_SELF'];
echo '
';

echo '$_SERVER["SCRIPT_NAME"]: ========> '.$_SERVER['SCRIPT_NAME'];
echo '
';

//The absolute path of the currently executing script.Remember, you can’t get it by running php in CLI mode
echo '$_SERVER["SCRIPT_FILENAME"]: ========> '.$_SERVER['SCRIPT_FILENAME'];
echo '
';

//The document root directory where the currently running script is located. Defined in the server configuration file.
echo '$_SERVER["DOCUMENT_ROOT"]: ========> '.$_SERVER['DOCUMENT_ROOT'];
echo '
';

//getcwd() returns the current working directory
echo "getcwd(): ========> ".getcwd();
echo '
';

echo '
';
echo "php tutorial (www.45it.com) finishing";