PHP Flatten Arrays

php-flatten.php

<?php
$array = [[1,2,[3]],4];
function returnValues($someArray, &$newArray) {
    foreach ($someArray as $value) {
        echo "checking value: " . print_r($value, true) . "<br/>\n";
        if (is_array($value)) {
            $values = returnValues($value, $newArray);
        }
        else {
            echo "pushing value<br/>\n";
            $newArray[] = $value;
        }
    }
}
$newArray = [];
returnValues($array, $newArray);
print_r($newArray);
?>