สอบถามเรื่องการเช็คข้อมูลซ้ำก่อนที่จะเพิ่มข้อมูลครับ

    <div class="modal fade" id="teacheradd2" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
        <div class="modal-dialog modal-sm" role="document">
            <div class="modal-content">
                    <div class="modal-header">
                        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                        <h4 class="modal-title" id="myModalLabel">เข้าสู่ระบบ</h4>
                    </div>

                    <form data-toggle="validator" role="form" id="teacher-add" method="POST">
                        <div class="modal-body"> 

                            <div class="form-group">
                                <label for="Username">ชื่อ - นามสกุล</label>
                                <input type="text" id="name" name="name" placeholder="ชื่อ-นามสกุล" class="form-control" required>
                                <span class='glyphicon form-control-feedback' aria-hidden='true'></span>
                            </div>

                            <div class="form-group">
                                <label for="Password">E-Mail</label>
                                <input type="email" id="email" name="email" placeholder="E-Mail" class="form-control" required>
                                <span class='glyphicon form-control-feedback' aria-hidden='true'></span>
                            </div>

                            <div class="form-group">
                                <label for="first_name">Password</label>
                                <input type="text" id="pw"  name="pw" placeholder="Password" class="form-control" required>
                            </div>

                            <div class="form-group">
                                <label>ประเภทผู้ใช้งาน</label>
                                <select class="form-control" id="type" name="type" required>
                                    <option value="1">เจ้าหน้าที่</option>
                                    <option value="2">อาจารย์</option>
                                </select>
                            </div>
                            <div class="form-group">
                                <label>เปิด/ปิด สถานะการใช้งาน</label> 
                                <select class="form-control" id="enable" name="enable" required>
                                    <option value="1">เปิด</option>
                                    <option value="2">ปิด</option>
                                </select>
                            </div>
                        </div>

                        <div class="modal-footer">
                            <button type="button" class="btn btn-default" data-dismiss="modal">ปิด</button>
                            <button type="submit" class="btn btn-primary"> บันทึก</button>
                        </div>
                    </form>
            </div>
        </div>
    </div>

    <script type="text/javascript">
        $(document).ready(function(){
                $('#teacher-add').on('submit',function(e){
                e.preventDefault();
                        $.ajax({
                            url:"controller/teacher/addteacher.php",
                            method:"post",
                            data:$('#teacher-add').serialize(),
                            successs:function(data){
                                if (data == '1name') {
                                    ('#teacheradd2').modal('hide');
                                    ('#checkemail').modal('show');
                                } else {
                                    if (data=="1email") {
                                    $('#teacheradd2').modal('hide');
                                    $('#checkemail').modal('show');
                                    }else{
                                    $('#teacher-add')[0].reset();
                                    $('#teacheradd2').modal('hide');
                                    location.reload();   
                                    }
                                }
                            }          
                        });
                });
        });

    </script>

<?php
		include("db_con.php");
		$name = $_POST['name'];
		$email = $_POST['email'];
		$pw = $_POST['pw'];
		$type = $_POST['type'];
		$enable = $_POST['enable'];
		$sqlteacher = mysql_query("select * from teacher where t_name ='$name'");
		$numteacher = mysql_num_rows($sqlteacher);

		if ($numteacher == 1) {
			echo "1name";
			
		}else{
				$sqlteacheremail = mysql_query("select * from teacher where t_email ='$email'");
				$numteacheremail = mysql_num_rows($sqlteacheremail);
			if ($numteacheremail == 1) {
			echo "1email";
			}else{
				$query = "INSERT INTO teacher(t_name, t_email, t_pw,  t_type, t_en) VALUES('$name', '$email', '$pw', '$type', '$enable')";
				if ($result = mysql_query($query)) {
					echo "add";
				}else{
					echo "error";
				}

			}

		}
?>