<?php abstract class Animal { function greeting() { $sound = $this->sound(); return strtoupper($sound); } function sound(); } class Dog extends Animal { function sound() { return "Woof!"; } } $dog = new Dog(); echo $dog->greeting(); ?>

What's the output? 20, 1 => 36, 40); array_rand ($a); echo $a[0]; ?>

echo new stdClass == new stdClass, '-', new stdClass !== new stdClass;

Function to prepend one or more elements to the beginning of an array?

Function to report errors from mysqli functions or queries?

Which function is a relative ftp function new to PHP5?

file_exists() will return false when

How will you find out the value of current session id?

What does this statement means $a === $b ?

Are ZIP extensions available by default in PHP 5.x ?

Which is used to sort an array in descending order?