"::" double colons is the scope operator it is used to call methods of a class that has not been instantiated. You should also understand static methods and how they differ from re...

Review the "autoload" and "spl_autoload_register" function (note:you should use the later). The autoload function basically triggers a function when a class is instantiated, you c...

It's simply the idea that one object can can take on many forms. So in PHP OOP one class "cars" may have two classes that extend it, for example a "Honda" class and a "BMW" class.

public, private and protected. The default is public. Public -> Any class may instantiate the class and call the method or property. Protected -> Only the class itself or inher...

1. mysql_fetch_row This function will return a row where the values will come in the order as they are defined in the SQL query, and the keys will span from 0 to one less than the...

$my_query = mysql_query("SELECT * FROM 'users' WHERE 'id'='1'; "); while($result = mysql_fetch_array($my_query)) { echo $result['First_name']; }

In PHP, we have the following looping statements: while - loops through a block of code as long as the specified condition is true do...while - loops through a block of code on...

Software in which the source codes are freely used, modify, and shared by anyone are called Open Source Software. These can also be distributed under licenses that adhere with the...

Create session : session_start(); Set value into session : $_SESSION['USER_ID']=1; Remove data from a session : unset($_SESSION['USER_ID'];

The main difference between sessions and cookies is that sessions are stored on the server, and cookies are stored on the user’s computers in the text file format. Cookies ca...