Challenge for ZEND PHP5 Certification - 021

[hinom 5]

Exercise 21

 

For passing a variable by reference:

 

A. Append a "&" prefix

B. Append a "#" prefix

C. Append a "&" sufix

D. Append a "&" sufix

[hinom 5]

Answer: A

 

Explanation

 

<?php
function foo (&$var)
{
	$var++;
}

$a=5;
foo ($a);
// $a is 6 here
?>

http://php.net/language.references.pass