internals2-php-opcodes-php-concat-4

  • Opcode Descriptions and
    Examples
  • CONCAT

  • CONCAT
  • CONCAT

    CONCAT

    PHP code

    <?php
    /*
     * Concats string values string1 and string2
     * opcode number: 8
     */
    echo "hello" "world";
    ?>

    PHP opcodes

    Function name: (null)

    Compiled variables: none

    line # op fetch ext return operands
    6 0 CONCAT     ~0 ‘hello’,’world’
      1 ECHO       ~0
    7 2 RETURN       1