unit_costを取得し、依存するドロップダウンリストにcat nameのsub_cat nameを挿入する方法は？

Question

Html modal Code to select and add category, Sub_category and unit_cost: 

    <form method="POST" action=""> 
     <div class="row"> 
      <div class="col-md-6"> 
       <label for="category1" class="control-label">Category:</label> 
       <select name="category1" id="category1" class='form-control input-md' onchange="document.getElementById('selected_text').value=this.options[this.selectedIndex].text"> 
       <?php while($row1 = $query1_parent->fetch_array()): ?> 
       <option value="<?php echo $row1['cat_id']; ?>"><?php echo $row1['category']; ?></option> 
       <?php endwhile; ?> 
       </select> 
       <input type="hidden" name="selected_text" id="selected_text" value="" /> 
      </div> 
      <div class="col-md-6"> 
       <label for="sub_category1" class="control-label">Sub_Category:</label> 
       <select name="sub_category1" id="sub_category1" class='form-control input-md' ></select> 
      </div> 
     </div> 

    <div class="row"> 
     <div class="col-md-6"> 
      <label for="quantity" class="control-label">Quantity:</label> 
      <input type="number" class="form-control" id="quantity" name="quantity" min="1" value="1"/> 
     </div> 
     <div class="col-md-6"> 
      <label for="unit_cost" class="control-label">Unit_cost:</label> 
      <input class="form-control" id="unit_cost" name="unit_cost"/> 

     </div> 
    </div> 
    <div class="row"> 
     <div class="col-md-12"> 
      <label for="total" class="control-label">Total:</label> 
      <input type="number" class="form-control" id="total" name="total"/> 
     </div> 
    </div> 


JS Function to load category and sub_category: 

    <script type="text/javascript"> 
$(document).ready(function() { 

    $("#category1").change(function() { 

     $.get('loadsubcat.php?category1=' + $(this).val(), function(data) { 
      $("#sub_category1").html(data); 
      $('#loader').slideUp(200, function() { 
       $(this).remove(); 
      }); 
     }); 
    }); 

}); 
</script> 


Loadsubcat.php: 

    <?php 
include('dbconnect.php'); 

$category1 = $_GET['category1']; 

$query1 = $con->query("SELECT * FROM subcategory WHERE cat_id = '$category1'"); 
while($row1 = $query1->fetch_array()) { 
    echo "<option value='$row1[subcat_id]'>$row1[sub_category]</option>"; 
} 


?> 


Php Code to insert category and sub_category: 

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


$cat = strip_tags($_POST['category1']); 
$sub_cat = strip_tags($_POST['sub_category1']); 
$quan = strip_tags($_POST['quantity']); 
$cost = strip_tags($_POST['unit_cost']); 

$total = strip_tags($_POST['total']); 

$cat = $con->real_escape_string($_POST['selected_text']); 
$sub_cat = $con->real_escape_string($sub_cat); 
$quan = $con->real_escape_string($quan); 
$cost = $con->real_escape_string($cost); 

$total = $con->real_escape_string($total); 


    $query = "INSERT INTO master_ship (fk_user_id, category, sub_category, quantity, unit_cost, total) VALUES('$user_id', '$cat', '$sub_cat', '$quan', '$cost', '$total')"; 
} 

$sub_cat = $con->real_escape_string($_POST['selected_text']);を使用してカテゴリのようなサブ_カテゴリ名を挿入しようとしましたが、それはSUB_CATEGORYとは機能しません。 カテゴリとサブカテゴリを使用してunit_costを取得するのを手伝ってください。私は過去数日からgoogleから多くの例を検索して試しましたが、うまくいきません。 アドバイスに感謝...

Answer 1

To insert sub_category (subcategory name) instead of subcat_id just replace in loadsubcat.php 

     <?php 
include('dbconnect.php'); 

$category1 = $_GET['category1']; 

$query1 = $con->query("SELECT * FROM subcategory WHERE cat_id = '$category1'"); 
while($row1 = $query1->fetch_array()) { 
    echo "<option value='$row1[subcat_id]'>$row1[sub_category]</option>"; 
} 


?> 


to 

    <?php 
include('dbconnect.php'); 

$category1 = $_GET['category1']; 

$query1 = $con->query("SELECT * FROM subcategory WHERE cat_id = '$category1'"); 
while($row1 = $query1->fetch_array()) { 

    echo "<option value='$row1[sub_category]'>$row1[sub_category]</option>"; 

} 


?> 

and to load unit_cost with sub_category add ajax 

<script type="text/javascript"> 
$(document).ready(function() { 

    $("#sub_category1").click(function() { 

     var package = $(this).val(); 
     $.ajax({ 
      type:'POST', 
      data:{package:package}, 
      url:'loadsubcatt.php', 
      success:function(data){ 
       $('#unit_cost').val(data); 
      } 

     }); 
    }); 

}); 
</script> 

loadsubcatt.php 

    <?php 

include('dbconnect.php'); 
if (isset($_POST['package'])) { 
    $unit = $_POST['package']; 
    $qry = $con->query("select * FROM subcategory WHERE sub_category = '$unit'"); 

     while ($res = $qry->fetch_array()) { 
      echo $res['unit_cost']; 
     } 

} 




?>