$s = "php (python), java (php programming tutorial) c# (c, c++) javascript";
preg_match_all('/\((.*?)\)/', $s, $arrays);
$arr = $arrays[1];
$arr_length = count($arrays[1]);
for($i = 0; $i < $arr_length; $i++)
{
echo $arrays[1][$i] . "<br />";
}
/*
run:
python
php programming tutorial
c, c++
*/