Question: What will be the output of the following code? function fn(&$var) {    $var = $var - ($var/10 *5);     return $var;   } echo fn (100);

Question: What does the following function do, when passed two integer values for $p and $q?

<?php
function magic($p, $q) {
  return ($q == 0)?$p:magic($q, $p % $q);
}
?>

Question: What would you replace ??????? with, below, to make the string "Hello, World!" be displayed?

<?php

function myfunction() {
        ???????
	print $string;
}

myfunction("Hello, World!");

?>

Question: What is the output of the following function?

<?php

function &find_variable(&$one, &$two, &$three) {
	
	if($one > 10 && $one < 20) return $one;
	if($two > 10 && $two < 20) return $two;
	if($three > 10 && $three < 20) return $three;
}

$one = 2;
$two = 20;
$three = 15;

$var = &find_variable($one, $two, $three);

$var++;

print "1: $one, 2: $two, 3: $three";

?>

Question: For an arbitrary string $mystring, which of the following checks will correctly determine if the string PHP exists within it?

Question: 

What are the values of $a in $obj_one and $obj_twowhen this script is executed?

<?php
class myClass {
 private $a;

 public function __construct() {
 $this->a = 10;
 }

 public function printValue() {
 print "The Value is: {$this->a}\n";
 }

 public function changeValue($val, $obj = null) {
 if(is_null($obj)) {
 $this->a = $val;
 } else {
 $obj->a = $val;
 }
 }

 public function getValue() {
 return $this->a;
 }
}

$obj_one = new myClass();
$obj_two = new myClass();

$obj_one->changeValue(20, $obj_two);
$obj_two->changeValue($obj_two->getValue(), $obj_one);

$obj_two->printValue();
$obj_one->printValue();

?>