now i have a string

$_SESSION['oids']="abc,def,ghi,jkl,pqr,mno,stu";
i want to sort this session to be
"abc,def,ghi,jkl,mno,pqr,stu";
i want to sort the string value according to the comma.

plz i need help quickly

http://www.php.net/manual/en/function.explode.php

http://www.php.net/manual/en/function.sort.php

http://www.php.net/manual/en/function.implode

in that order.

Sorting Strings
<?php
$arr1 = $arr2 = array("img12.png","img10.png","img2.png","img1.png ");
echo "Standard string comparison\n";
usort($arr1,"strcmp");
print_r($arr1);
echo "\nNatural order string comparison\n";
usort($arr2,"strnatcmp");
print_r($arr2);
?>

/* Output
Standard string comparison
Array
(
[0] => img1.png
[1] => img10.png
[2] => img12.png
[3] => img2.png
)
Natural order string comparison
Array
(
[0] => img1.png
[1] => img2.png
[2] => img10.png
[3] => img12.png
)
*/