Get names from email address

email-splitter.js

document.getElementById('email').onchange=get_names; // When an input with id email is completed we can get to work!

function get_names(){ // Calls function
var email = document.getElementById('email').value; // Gets what was entered into email e.g [email protected]
var parts = email.split("@"); // Splits the email at the @ symbol

var username = parts[0]; // Can be used as a username if you'd like, but we'll use it to find names anyway

var delimiters = [".", "-", "_"];  // List of common email name delimiters, feel free to add to it

delimiters.forEach(splitting_loop);

function splitting_loop(element, index, array) { // Checks all the delimiters
  var parts_name = username.replace(/\d+/g, ''); // Remove numbers from string
  var num = parts_name.indexOf(element); // Gets the position of the delimiter
  if (num > -1) { // If there is a delimiter
    fname = parts_name.substring(0, (num)); // Gets data before delimiter
    lname = parts_name.substring(num + 1, (parts_name.length)); // Gets name after delimiter

    fname = fname.toLowerCase(); // Makes it all lower case
    lname = lname.toLowerCase();

    fname = fname.charAt(0).toUpperCase() + fname.slice(1); // Capitalise first letter as well so it looks prettier
    lname = lname.charAt(0).toUpperCase() + lname.slice(1);

  }

}
if (typeof fname !== 'undefined') { // If we've found a delimiter we can use it
  /* This code just shows what you can do with the names, but you can use it for something more interesting! */
  window.alert(fname + ' ' + lname);
}

email-splitter.php

<?php
$email = "[email protected]"; // Or Use $_GET['subject']; / $_POST['subject']; depending on form
$parts = explode("@",$email); // Splits the email at the @ symbol
$username = $parts[0]; // Can be used as a username if you'd like, but we'll use it to find names anyway

$delimiters = array(".", "-", "_"); // List of common email name delimiters, feel free to add to it

foreach ($delimiters as $delimiter){ // Checks all the delimiters
	if ( strpos($username, $delimiter) ){ // If the delimiter is found in the string
	  $parts_name = preg_replace("/\d+$/","", $username); // Remove numbers from string
	  $parts_name = explode( $delimiter, $parts_name); // Split the username at the delimiter
	  break; // If we've found a delimiter we can move on
	}
}

if ( $parts_name ){ // If we've found a delimiter we can use it
$fname = ucfirst( strtolower( $parts_name[0] ) ); // Lets tidy up the names so the first letter is a capital and rest lower case
$lname = ucfirst( strtolower( $parts_name[1] ) );

/* This code just shows what you can do with the names, but you can use it for something more interesting! */
echo $fname . ' ' . $lname;
}