removing @email.com from string in php

Question

I want to just get the left half of an email address ( the username part of username@email.com ), so stripping the @ and any characters after it.

Answer 1

function subStrEmail($Useremail)
{
    $emailSub=substr($Useremail,4);
    $email = explode('.', $emailSub);

    if($email[0]=='www'){
        $email=substr($emailSub,4);
        $email=ltrim($email,'www.');
        return $email;
    }
    return $emailSub;
}