PHP: Array passed by reference to a function?

Question

I have this php function that has to perform some processing on a given array:

processArray($arrayToProcess) {

  $arrayToProcess['helloStackOverflow'] = TRUE;
}

Later, the code invokes the following:

$niceArray = array('key' => 'value');
processArray($niceArray);

The key 'helloStackOverflow' isn't available outside the processArray function. I tried calling the following:

processArray(&$niceArray);

Using "&" helps, however it raises some warning:

Deprecated function: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of populateForm_withTextfields()

Tried the & in there, but that just stops the code.

How should I do this?

Answer 1

You have to define the reference in the function, not in the call to the function.

function processArray(&$arrayToProcess) {

Answer 2

processArray(&$arrayToProcess) {

  $arrayToProcess['helloStackOverflow'] = TRUE;
}

implements the reference in PHP way.

See http://fi2.php.net/references for useful information about references.