Php OOP - Examples and Tips
Different between self:: and static (Late Static Bindings)
Static references to the current class like self:: or __CLASS__ are resolved using the class in which the function belongs, as in where it was defined.
Static references to the current class like self:: or __CLASS__ are resolved using the class in which the function belongs, as in where it was defined.
If not already done, you must enable apache headers (mod_headers.c) module
Check module is enabled or not:ls /etc/apache2/mods-enabled/
Method 1. (Classical way)
Use a captcha system like Math captcha, Image captcha, reCaptcha of google....
(Tested on Chrome Version 56)