I have wrote an regular expression that removed all the content from once bracket to end of bracket, But its not working, I wrote a explode code but its not working properly, anyone have an regular expression from that i can remove brackets and content inside them

Here is my code for explode:

```
$arr = explode(". ", $des);
$arr2= explode("(", $arr[0]);
$arr3=explode(")", $arr2[1]);
$arr[0]=$arr2[0].$arr3[1];

```

Please anyone provide me regular express from that 

e.g: I am a web developer ($123.Abc) and I am from US.

I need to remove ($123.Abc) from the above line..

Please help!!!