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What are the different scopes of variables?

How can you enable error reporting in PHP?

Explain what the different PHP errors are

Differentiate between echo and print()

Is multiple inheritance supported in PHP?

What is the differences between $a != $b and $a !== $b ?

Give me some real life examples when you had to use __destruct in your classes

Can you extend a Final defined class?

What's the difference between isset() and array_key_exists() ?

What is the difference between single-quoted and double-quoted strings in PHP?

When should I use require vs include ?

Is there a difference between isset and !empty ?

What are PSRs? Choose 1 and briefly describe it

Explain usage of enumerations in PHP

What is the difference between var_dump() and print_r() ?

What are the main differences between const vs define

What is stdClass in PHP?

What are the differences between die() and exit() functions in PHP?

How is it possible to set an infinite execution time for PHP script?

What does the 'var' keyword mean in PHP?

In PHP, objects are they passed by value or by reference?

What do we mean by keys and values?

Explain how we handle exceptions in PHP?

What is PDO in PHP?