Which function returns the size of a specified file on the FTP server?

What does this code do? namespace Hello\World;

Which elements can be encapsulated by namespaces?

Not a valid PHP variable type conversion?

Is there a function to listen on E_ERROR (fatal) errors?

Which PHP extension allows you to simplify converting between different calendar formats?

What will be the output?

What's the output?

What's the output? echo '1'.print(2) + 3;

Which are valid PHP data types?

Which is true regarding the str_replace() function in PHP?