internals2-php-opcodes-php-fetch-constant-4

  • Opcode Descriptions and
    Examples
  • FETCH_CONSTANT

  • FETCH_CONSTANT
  • FETCH_CONSTANT

    FETCH_CONSTANT

    PHP code

    <?php
    /*
     * Fetch the constant value bound to the specified name (name) and stores it into a variable (result).
     * opcode number: 99
     */
    define("FOO""something");
    echo 
    FOO;
    ?>

    PHP opcodes

    Function name: (null)

    Compiled variables: none

    line # op fetch ext return operands
    6 0 SEND_VAL       ‘FOO’
      1 SEND_VAL       ‘something’
      2 DO_FCALL   2   ‘define’
    7 3 FETCH_CONSTANT     ~1 ‘FOO’
      4 ECHO       ~1
    8 5 RETURN       1