Which of the following would produce an error: $currentDT=new DateTime(); 

Which is not correct?

By default, every database connection opened by a script is either explicitly closed by the user during run time or released ..... at the end of the script.

Which statement is not correct? $x = null;

Which would show an error in PHP?

Which expression will return true for below sample code? $a = true; $b = false;

Which PHP function sorts an array?

Functions using global variables must declare the variables by using

An example of a PHP string is:

Which is a characteristic of the PHP language?

How do you combine multiple arrays into one single PHP array?