Zend Certified PHP Engineer

How do you allow the caller to submit a variable number of arguments to a function?

What will the $array array contain at the end of this script? function modifyArray (&$array) { foreach ($array as &$value) { $value = $value + 1; } $val...

What is the output of the following code? class a { public $val; } function renderVal (a $a) { if ($a) { echo $a->val; } } renderVal (null);

What is the output of the following code? function fibonacci (&$x1 = 0, &$x2 = 1) { $result = $x1 + $x2; $x1 = $x2; $x2 = $result; return $result; } for...

What is the output of the following code? function ratio ($x1 = 10, $x2) { if (isset ($x2)) { return $x2 / $x1; } } echo ratio (0);