PHP FILTER_VALIDATE_BOOLEAN Filter

The FILTER_VALIDATE_BOOLEAN filter validates value as a boolean option.

  • Name: "boolean"
  • ID-number: 258

    • Possible return values : -

  • Returns TRUE for "1", "true", "on" and "yes"
  • Returns FALSE for "0", "false", "off" and "no"
  • Returns NULL otherwise.

    • Example -

    The output of the code will be : -

    bool(true)