What does the following PHP code do? preg_filter($pattern, $replace, $subject)

What's the output? $x=array(2=>'mouse',7=>'keyboard'); $y=array_keys($x); echo $y[1];

Which do not return a timestamp?

What's the output? class angryBob{ public function angryBob(){ $this->apple = 'Taken away by Bob' } } class sillyBill extends angryBob{ var $apple; public function sillyBill() { $this->apple = 'Eaten by Bill' parent::angryBob(); } } $Bill = new sillyBill; echo $Bill->apple;

Which PHP function checks a month, day, and year number to determine if they form a valid Gregorian date?

Correct way to assign a class constant?

Correct way to read the result of a variable dump into a string?

Best way to automatically deploy a PHP website using git push?

Output of the code?

Best way to get the index(es) of the highest value(s) in an array?

Which is false about foreach loop in PHP?