Which of the following variables is not a predefined variable?

If the allow_url_fopen configuration setting is enabled, which of the following functions will be able to open remote urls?

Which function checks for a specific PHP data type?

How would you determine if a variable is set?

Which function will generate random integers?

What types of arrays are supported in PHP?

Which expression would return true?

Method to tweak an object’s cloning behavior?

What will be the output? echo (1234 == '1234 test' ? 'Equal' : 'Not equal' );

How do you access result set meta data?

Xdebug is a PHP ...., the information which Xdebug provides is about stack and functions with full parameter for user defined functions, memory allocation and support for infinite recursions.