Zend Certified PHP Engineer

Which of the following PHP values may NOT be encoded to a JavaScript literal using PHP's ext/json capabilities?

Which of the following will NOT instantiate a DateTime object with the current timestamp?

Given a DateTime object that is set to the first second of the year 2014, which of the following samples will correctly return a date in the format '2014-01-01...

Given the following DateTime objects, what can you use to compare the two dates and indicate that $date2 is the later of the two dates? $date1 = new DateTime('2...

Given the following DateTime object, which sample will NOT alter the date to the value '2014-02-15'? $date = new DateTime('2014-03-15');