What will be the output of the following PHP code? <?php $fruits = array ("mango", "apple", "peach", "pear"); $fruits = asort ($fruits); printr ($fruits); ?>

What's the output: $a = true; echo (is_null($a)) ;

What is the functions unlink?

.......... Returns the time of sunrise for a given day / location

Which is not valid PHP code?

What's the output? $integer = 5; $string = strval($integer); var_dump($string);

Which variable type can NOT be used as a type hint?

How should you filter variables before passing to header()?

How do you get header information from a URL?

Which functions get a list of response headers sent (or ready to send)?

Which functions compare the substrings of the parameters?