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.
What does accessing a class via :: means?
:: is used to access static methods that do not require object initialization.
What is the function func_num_args() used for?
The function func_num_args() is used to give the number of parameters passed into a function.
How is the ternary conditional operator used in PHP?
It is composed of three expressions: a condition, and two operands describing what instruction should be performed when the specified condition is true or false as follows: Expression_1?Expression_2 : Expression_3;
When is a conditional statement ended with endif?
When the original if was followed by: and then the code block without braces.