PHP Gets the implementation code for the absolute path of the current file

$basedir = DirName (__file__); Echo $basedir; An absolute path to the file will be printed on the page! ?> Copy Code You can then use Define (' ROOT ', DirName (__file__)); Require_once ROOT. ' /config/conf_mysql.php '; Copy Code Introducing Files Several commonly used PHP " Magic Constants " names describe the current line number in the __line__ file. The full path and file name of the __file__ file. If used in the include file, the include filename is returned. Since PHP 4.0.2, __file__ always contains an absolute path, and the previous version sometimes contains a relative path. __function__ function name (PHP 4.3.0 new addition). From PHP 5 This constant returns the name (case-sensitive) when the function is defined. In PHP 4, this value is always in lowercase letters. The name of the __class__ class (PHP 4.3.0 new addition). From PHP 5 This constant returns the name of the class when it is defined (case-sensitive). In PHP 4, this value is always in lowercase letters. The method name of the __method__ class (PHP 5.0.0 new addition). Returns the name of the method when it is defined (case-sensitive). Please firmly grasp the above, in the programming skills used more.

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