php __class__ - Wikitechy https://www.wikitechy.com/interview-questions/tag/php-__class__/ Interview Questions Mon, 01 Aug 2022 09:30:59 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png php __class__ - Wikitechy https://www.wikitechy.com/interview-questions/tag/php-__class__/ 32 32 What are Magic Constants in PHP ? https://www.wikitechy.com/interview-questions/php/what-are-magic-constants-in-php/ https://www.wikitechy.com/interview-questions/php/what-are-magic-constants-in-php/#respond Mon, 01 Aug 2022 09:09:07 +0000 https://www.wikitechy.com/interview-questions/?p=4535
  • In PHP magic constants are the predefined constants which is used on the basis of their use.
  • Constants are created by various extensions and there are nine magic constants in the PHP and all of the constant resolved at the compile-time, not like the regular constant which is resolved at run time.
  • In this there are eight magic constants which start and end with double underscores (__), they are.
    • __line__
    • __file__
    • __dir__
    • __function__
    • __class__
    • __method__
    • __namespace__
    • __trait__

    • __line__

    • This type of magic constant returns the current line number of the file.
    • In our program file if we use this magic constant somewhere then this constant will display the line number during compile time.

    Syntax

             __line__

    __file__

    • This type of magic constant return the full path of the executed file with the name of the file.

    Syntax

             __file__

    __dir__

    • This type of magic constant returns the directory of the executed file.

    Syntax

              __dir__

    __function__

    • This type of magic constant returns the name of the function where it is included.

    Syntax

             __function__

    __class__

    • This type of magic constant returns the name of the class where it is included.

    Syntax

    __class__

    __method__

    • This type of magic constant returns the method name where it is included.

    Syntax

           __method__

    __namespace__

    This type of magic constant returns the current namespace where it is included.

    Syntax

           __namespace__

    __trait__

    • This type of magic constant returns the trait name where it is included.

    Syntax

      __trait__

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