How can I split the string using php?

Let us consider we get a value from a post actionone,two,three
i.e: $ss = $_POST['arv'];

Now using the php method explode() we will convert the string in to a array object
explode(seperator,string);
i.e. $tok = explode(‘,’,$ss);

so we have got a string array. Now we print the array using print_r() method. This method prints the array in string format.

print_r($tok);

The result
Array ( [0] => one [1] => two [2] => three )