php mysql จะแก้ไขจำนวนสินค้า แต่ต้องให้หัวหน้าอนุมัติ ทำอย่างไรค่ะ

<?php include('header.php'); ?> 
           
            <div class="content-wrapper">
                <!-- Content Header (Page header) -->
                <section class="content-header">
                    <h1>
             Adjust</h1>
<p align="right">
<a href="show_addproductc.php">
<button name="insert" >History</button></a>
</p>
                </section>
                <!-- Main content -->
                <section class="content">
                    <form class="form-horizontal" method="post"   >
                        <div class="box-body">     
                        
                                            
                           
                                                       <script>

                            function findproduct_current(str) 
                            {
                                
                                 if (str.length == 0) { 
                                     document.getElementById("pro_qtycurrent").innerHTML = "";
                                     return;
                                 } else {
                                     var xmlhttp = new XMLHttpRequest();
                                     xmlhttp.onreadystatechange = function() 
									 
									 {
                                       if (xmlhttp.readyState == 4 && xmlhttp.status == 200) 
									        {
                                             document.getElementById("pro_qtycurrent").value = xmlhttp.responseText;
                                                
                                            var qty= xmlhttp.responseText;
                                                
                                            }
                                     }
                                     xmlhttp.open("GET", "find_product.php?id="+str, true);
                                     xmlhttp.send();
									 
									 findprono(str);

                              }
                            }
							
							
						  function findprono(str) 
                            {
                                
                                 if (str.length == 0) { 
                                     document.getElementById("pro_no").innerHTML = "";
                                     return;
                                 } else {
                                     var xmlhttp = new XMLHttpRequest();
                                     xmlhttp.onreadystatechange = function() 
									 
									 {
                                       if (xmlhttp.readyState == 4 && xmlhttp.status == 200) 
									        {
                                             document.getElementById("pro_no").value = xmlhttp.responseText;
                                                
                                            var qty= xmlhttp.responseText;
                                                
                                            }
                                     }
                                     xmlhttp.open("GET", "find_prono.php?id="+str, true);
                                     xmlhttp.send();

                              }
                            }
							                              
                            </script>                                                      
                            <div class="form-group">
                                <label for="pro_id" class="col-sm-2 control-label">Product name *</label>
                                <div class="col-sm-10">
                                    <select name="pro_id" id="pro_id" class="form-control" onchange="findproduct_current(this.value)">
                                       <option value="">
                                                --Select--
                                            </option>                                       
                                       <?php
                                        $sqld=" select * from tb_product";
                                        if(isset($_GET['pro_id']))
                                        {
                                            $pro_id=$_GET['pro_id'];
                                            $sqld.=" where";
                                            $sqld.=" pro_id='$pro_id'";
                                        }
                                        $resultd=$cls_con->select_base($sqld);
                                        while($rowd=mysqli_fetch_array($resultd))
                                        { 
                                            $pro_id=$rowd['pro_id'];
                                            $pro_name=$rowd['pro_name'];                                                                                          
                                        ?>
                                            <option value="<?=$pro_id;?>">
                                                <?=$pro_name;?>
                                            </option>
                                            <?php } ?>
                                    </select>
                                </div>
                            </div>
                            <div class="form-group">
                                <label for="pro_no" class="col-sm-2 control-label">Product code</label>
                                <div class="col-sm-10">
                                    <input type="text" class="form-control" name="pro_no" id="pro_no" readonly placeholder="">
                                </div>
                            </div>							
                            <div class="form-group">
                                <label for="pro_qtycurrent" class="col-sm-2 control-label">Current number</label>
                            <div class="col-sm-10">
                                <input readonly="readonly" class="form-control" name="pro_qtycurrent" id="pro_qtycurrent" placeholder="แสดงจำนวนปัจจุบัน">
                                </div>
                            </div>
                            <div class="form-group">
                                <label for="editpro_from" class="col-sm-2 control-label">Adjust amount</label>
                            <div class="col-sm-10">
                                <select name="editpro_from" id="editpro_from" class="form-control">
                                <option value="Adjust amount">Adjust amount</option>                              
                                </select>
                            </div>
							</div>
							<div class="form-group">
                                <label for="editpro_reason" class="col-sm-2 control-label">Note *</label>
                            <div class="col-sm-10">                              
								<input type="readonly" class="form-control" name="editpro_reason" required="required" id="editpro_reason" placeholder="Note">  
                                </div>
							</div>
							<div class="form-group">
                                <label for="editpro_qty" class="col-sm-2 control-label">Amount to adjust *</label>
                                <div class="col-sm-10">
                                <input class="form-control" name="editpro_qty" required="required" type="text" value="<?php echo @$_POST['editpro_qty'] ?>">				
                                </div>
							</div>
							</div>
                        <!-- /.box-body -->
                        <center>
                            <button type="submit" name="submit" class="btn btn-info">Confirm</button>
                            <button type="reset" name="reset" class="btn btn-warning">Cancel</button>
                        </center>
                    </form>
                    <?php
                if(isset($_POST['submit']))
                {
                  $pro_id=$_POST['pro_id'];
                  $pro_qtycurrent=$_POST['pro_qtycurrent'];
                  $editpro_from=$_POST['editpro_from'];
				  $editpro_reason=$_POST['editpro_reason'];
                  $editpro_qty=$_POST['editpro_qty'];
                  $new_qty=$editpro_qty;                  
                  $sqlu=" update tb_product";
                  $sqlu.=" set";
                  $sqlu.=" pro_qty='$new_qty'";
                  $sqlu.=" where";
                  $sqlu.=" pro_id='$pro_id'";
                  $cls_con->write_base($sqlu);
                  $sql=" insert into tb_editproduct (pro_id,pro_qtycurrent,editpro_from,editpro_reason,editpro_qty,editpro_date)";
                  $sql.=" values ('$pro_id','$pro_qtycurrent','$editpro_from','$editpro_reason','$editpro_qty',now())";
                    
                     if($cls_con->write_base($sql)==true){
                     echo $cls_con->show_message('Seccess');
                     echo $cls_con->goto_page(1,'show_editqty.php');
                     //echo $sql;
                  }
                  else{
                    echo $cls_con->show_message('Failed to save data');
                  }
                }
                ?>
                </section>
                <!-- /.content -->
            </div>
            <!-- เนื้อหา -->
            <?php include('footer.php'); ?>