Question : Using PHP to make First Initial Last Name Combination

Using php I need to turn the format "first name last name, title" such as:

Tim Johnson, CEO

into "first inital last name combined" such as:
tjohnson

Could someone share the code with me to do this?
Thanks!

Answer : Using PHP to make First Initial Last Name Combination

It had a typo:

$combined = preg_replace('/^([a-zA-Z])[a-zA-|]+\ ([a-zA-Z]+).*$/', '\1\2', $fullname);
$combined = strtolower($combined);