What will be the output of the following code: <?php class A {} class B {} class C extends B {} class D { function sayHello (A $argument) { echo '$argument is an instance of A'; } function sayHello (B $argument) { echo '$argument is an instance of B'; } } $d = new D(); $c = new C(); $d->sayHello($c);

$table = array('old_value'); foreach($table as $row) { $row='new_value'; } echo $table[0]; will produce:

What's the output

What's the value of $res?

The following would return? extract( array( 'sexy' => 'a', 'and' => 'b', 'i' => 'c', 'know' => 'd', 'it' => 'e' ) ); return $sexy.$and.$i.$know.$it;

Which variable assignment is 'by reference' in PHP?

In PHP, the die() and exit() functions do the exact same thing.

Which is a superglobal variable??

Which is a valid start to a pho comment?

Which splits a string to an array ?

How you fetch this ? $connect = mysqli_connect('ip','test','pass'); msqli_query($connect,'use test'); $query = msqli_query($connect,'SELECT name FROM question');