What is the difference between session_unregister() and session_unset()?
The session_unregister() function unregister a global variable from the current session and the session_unset() function frees all session variables.
When do sessions end?
Sessions automatically end when the PHP script finishes executing but can be manually ended using the session_write_close().
What is the meaning of a Persistent Cookie?
A persistent cookie is permanently stored in a cookie file on the browser’s computer. By default, cookies are temporary and are erased if we close the browser.
How can you propagate a session id?
You can propagate a session id via cookies or URL parameters.
How to initiate a session in PHP?
The use of the function session_start() lets us activating a session.
what is the definition of a session?
A session is a logical object enabling us to preserve temporary data across multiple PHP pages.
What is faster?
1- Combining two variables as follows: $variable1 = 'Hello '; $variable2 = 'World'; $variable3 = $variable1.$variable2; Or 2- $variable3 = "$variable1$variable2"; $variable3 will contain “Hello World”. The first code is…
What’s the difference between __sleep and __wakeup?
__sleep returns the array of all the variables that need to be saved, while __wakeup retrieves them.
Are Parent constructors called implicitly inside a class constructor?
No, a parent constructor have to be called explicitly as follows: parent::constructor($value)
In PHP, objects are they passed by value or by reference?
In PHP, objects are passed by reference.