PHP registration

I'm trying to write a simple registration form form for my school project.. I dont get any errorst but every time i try to run this code it seems like it is only executing the "echo ""fill out this m8""

<?php

if(isset($_POST['submit'])){

    $usr_pass1 = $_POST['usr_password'];
    $usr_pass2 = $_POST['usr_password2'];
    $usr_mail1 = $_POST['usr_email'];
    $usr_mail2 = $_POST['usr_email2'];

    if($usr_pass1 == $usr_pass2){   
        if($usr_mail == $usr_mail){

        //mail chck 
            if (verifyEmail(usr_mail1,my_mail) == valid ) 
            {

                //sql here
            }

enter code//sql stuff       
        $lname = mysql_escape_string($_POST['lname']);  
        $fname = mysql_escape_string($_POST['fname']);
        $usr_name = mysql_escape_string($_POST['usr_name']);
        $usr_pass1 = mysql_escape_string($usr_pass1);
        $usr_pass2 = mysql_escape_string($usr_pass2);
        $usr_mail1 = mysql_escape_string($usr_mail1);
        $usr_mail2 = mysql_escape_string($usr_mail2);

        $usr_pass1 = md5(usr_pass1);

    $sql = mysql_query("SELECT * FROM `foglalo` WHERE `usrname` = '$usr_name'");
        if(mysql_num_rows($sql) > 0)    {
            echo "user already exists";
            exit();
        }
        mysql_query("INSERT INTO `foglalo` (`id`,fname`,`lname`,`usrname`,`usrpw`)
                VALUES(NULL,'$fname','$lname','$usr_name','$usr_pass1')") or die(mysql_error());



//sql stuff end     
            }else { 
             echo "sry , your e-mails do not match.<br/>";
             exit();
            }

        }else{ 
            echo "sry, your passwords do not match/<br/>";
            exit();
        }

}else {
     echo "fill out this m8";   
    }
?> `