Object iteration. class A { public $v1 = 'a'; protected $v2 = 'b'; private $v3 = 'c'; var $v4 = 'd'; } $a = new A(); foreach ($a as $k => $v) { echo "$k => $v\n"; } What is the output of the foreach loop?

What will isset() return in the following code? $search_array = array('first' => null, 'second' => 4); isset($search_array['first']);

In what version of PHP were namespaces added?

What does php_strip_whitespace function return?

Which function compute the intersection of arrays with additional index check and are defined newly in PHP5?

class B { public $b; } function process_a($a) { $a['b'] = 42; } function process_b($b) { $b->b = 42; } $v1 = array('b' => 2); process_a($v1); $v2 = new B(); $v2->b = 2; process_b($v2); What are the values of $v1['b'] and $v2->b?

Which is correct with regard to echo and print ?

Which is a PHP resource?

Does PHP 5 support exceptions?

Which characters are taken care of by htmlspecialchars?

You have two strings, you want to concatenate. $str1 = 'Have a '; $str2 = 'Nice Day'; The fastest way would be: