PHP

<?php
function evalLoggedUser($conx,$id,$u,$p,$fn){
    $sql        = "SELECT `_ipa` FROM `_users` WHERE id='$id' AND _usern='$u' AND _passw='$p' AND _firstn='$fn' LIMIT 1";
    $query      = mysqli_query($conx,$sql);
    $numrows    = mysqli_num_rows($query);
        if($numrows > 0)return TRUE;

}
if (...){
    ....
    $user_ok   =   evalLoggedUser($dBconx,$log_id,$log_username,$log_password,$log_fname);
}
elseif (...) {
    ...
    $user_ok = evalLoggedUser($dBconx, $log_id, $log_username, $log_password, $log_fname);
}
?>