Formatting Username question

[justineaguas]

I am creating a website for my project in school. Our professor requires the username of our clients to have a format. For example..

 

First Name: John

Last Name: Williams

Middle Initial: S

 

and the username should be like jswilliams

 

It will get the first letter of the firstname, the middle initial and the whole last name. all lower-cased characters.

 

I have been playing with a lot of codes however I can't seem to find the correct one. I always end up wrong. How do I do this? 

[smerny]

try this

 

$username = strtolower($first[0] . $middle . $last);

 

 

[alpine]

Should handle several pitfalls

$username = strtolower(join(str_replace(" ", "", array(substr(ltrim($firstname),0,1),substr(ltrim($middlename),0,1),ltrim($lastname)))));