• Variables are predefined in PHP

    Variables are predefined in PHP
    php provides a large number of predefined variables for any script that runs. php provides an additional set of arrays containing variables from web server, environment variables
  • Variable in PHP

    Variable in PHP
    the main way to store information in php programs is to use a variable.
  • Constants in PHP

    Constants in PHP
    a constant is a name or an identifier for a single value. the value of the constant cannot be changed during script execution. by default, a constant is case sensitive.