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@ 2015-11-09T15:51:02Z

<?php

$params = [1,2,3];

function transform(array &$params)
{
    $references = [];
    foreach ($params as &$value) {
        $references[] = &$value;
    }
    $value = "foo";
    return $references;
}

var_dump($params);
$p = transform($params);

var_dump($params);
var_dump($p);

debug_zval_dump($params);
debug_zval_dump($p);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
debug_zval_dump: documentation ( source)

preferences:dark modelive preview

52.35 ms | 402 KiB | 5 Q