Here is a quick tip on parsing and unparsing string and array in PHP.
You can parses the string into variables by using the parse_str PHP function.
Using parse_str function

It’s very easy to print array and object with jQuery. You can do it with jQuery.each() function. The jQuery.each() function can be used to iterate over any collection, whether it is a map (JavaScript object) or an array.
Here is the javascript code to print array or object:

jQuery(document).ready(function(){
var arr = [ "earth", "mars", "jupiter", "saturn", "venus" ];
var obj = { one:"earth", two:"mars", three:"jupiter", four:"saturn", five:"venus" };

jQuery.each(arr, function(i, val) {
$("#arrData").append(i + " : " + val + "<br/>");
});

jQuery.each(obj, function(i, val) {
$("#objData").append(i + " => " + val + …

It’s a real headache when you have to work on objects and arrays in Javascript. It would be lot easier to detect elements of the Javascript objects/arrays if we have print_r function in Javascript as we have in PHP.
I googled the web and have found a very efficient print_r Javascript function. This has helped me a lot in my projects. Here is the code:-

I had to work on multi-dimensional array with javascript and php. I had a multi-dimensional array in php. I had to load it into javascript array and then populate the html selection list.
The challenge for me was to create multi-dimensional array in javascript and populate selection list with for loop in javascript.

Problem:
Concatenate and fetch data from two fields of database and then break it again.
Solution: