<?php

function filterName($field){

    // Sanitize user name
    $field = filter_var(trim($field), FILTER_SANITIZE_STRING);
    
    // Validate user name
    if(filter_var($field, FILTER_VALIDATE_REGEXP, array("options"=>array("regexp"=>"/^[a-zA-Z\-\s]+$/")))){
        return $field;
    }else{
        return FALSE;
    }

}    

?>