lol i just saw what i wrote lack of sleep and a 14 hour shift does hell for my coding :P
it should be
$b = array('1a', '2b', '3c', '4d', '5e'); //put the data into an array
$_GET['data]=implode(',', $b); // make the array a string and assign it ot $_GET['data']
$c=$_GET['data'];
//then to get the info
$data=explode('-', $c); //makes $c into an array with data as $c[0] and your data string as $c[1] (to add more data just add "-" then your string)
$data=explode(',', $data[1]); // remakes the origanal array from the string
echo $data[0]; //returns 1a