I got a bunch of strings like this one:

```
(50 μg/ml); (10, 20, 30, 40, 50, 60 μg/ml) (sub-diploid DNA fraction) (p<0.05)  

```

What I want to do with PHP now is to replace the "<" in the last parentheses so it will look like: 

```
(p&#60;0.05)  

```

I actually got tired and frustrated from googling so please help me out with that. Just need a php preg replace function which finds the less than and greater than symbols within parenthesis of a string and replace it with it's ASCII code.