PHP Interview Questions and answers» array_combine archives – interview questions and answers http://www.phpinterviewquestions.com Prepare for your next php based interview with high confidence Mon, 26 Sep 2011 08:37:10 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 Passive Iteration http://www.phpinterviewquestions.com/php-interview-questions/passive-iteration/ http://www.phpinterviewquestions.com/php-interview-questions/passive-iteration/#comments Sun, 28 Feb 2010 10:49:29 +0000 Bart http://www.phpinterviewquestions.com/?p=49 What will be the out put of the following code snippet ?

<?php
function setcase(&$value, &$key){
$value = strtoupper($value);
}
$type = array('internal','external');
$format[] = array('rss','html','xml');
$format[] = array('csv','jason');
$map = array_combine($type, $format);
array_walk_recursive($map, 'setcase');
print_r($map);
?>

Only scalar values will be converted to upper cases. ‘ internal’ and ‘external’ are not passed into the user defined function.

Array
(
    [internal] =&gt; Array
        (
            [0] =&gt; RSS
            [1] =&gt; HTML
            [2] =&gt; XML
        )

    [external] =&gt; Array
        (
            [0] =&gt; CSV
            [1] =&gt; JASON
        )

)

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