Utility Functions

1. Sorting with user defined comparator

In PHP -

usort($bp_radios, create_function('$a, $b', 
               'return $a["radio_index"] - $b["radio_index"];')); 

In JS -

tabRF_apList[i]['radios'].sort(function(a,b) {
        return a['radio_index'] - b['radio_index']});

2. Array <=> String with delimiter

In PHP -

$radio = implode('/', $radioNameArray);       // {'a', 'b'} => 'a/b'
$radioNameArray = explode('/', $radio);

In JS -

var radio = radioNameArray.join('/');     
var radioNameArray = radio.split("/");