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        AJAX มีปัญหาเรื่องการเรียกข้อมูลมาแล้วไม่ขึ้นครับ มัน Refresh page ครับ แก้ไขยังไงครับ     | 
   
  
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                Code (PHP) 
ผมอยากกดปุ่ม แล้วดึงข้อมูลจากหน้า get_data1.php  มาโชว์อะครับ 
โค๊ด หน้า Mat_history.php ครับ 
<?php
require_once("connect.php");
?>
<!DOCTYPE html>
<html lang="en">
<head>
  
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <meta name="description" content="">
  <meta name="author" content="">
  <link rel="stylesheet" media="all" type="text/css" href="jquery-ui.css" />
  <link rel="stylesheet" media="all" type="text/css" href="jquery-ui-timepicker-addon.css" />
  <link rel="stylesheet" type="text/css" href="jquery.datetimepicker.css">
  <script type="text/javascript" src="css/jquery-3.4.1.min.js"></script>
  <script type="text/javascript" src="jquery.datetimepicker.js"></script>
  <script type="text/javascript" src="jquery-ui.min.js"></script>
  <script type="text/javascript" src="jquery-ui-timepicker-addon.js"></script>
  <script type="text/javascript" src="jquery-ui-sliderAccess.js"></script>
  <title>Tokyo Seisakusho(Asia)</title>
  <!-- Font Awesome Icons -->
  <link href="vendor/fontawesome-free/css/all.min.css" rel="stylesheet" type="text/css">
  <!-- Google Fonts -->
  <link href="https://fonts.googleapis.com/css?family=Merriweather+Sans:400,700" rel="stylesheet">
  <link href='https://fonts.googleapis.com/css?family=Merriweather:400,300,300italic,400italic,700,700italic' rel='stylesheet' type='text/css'>
  <!-- Plugin CSS -->
  <link href="vendor/magnific-popup/magnific-popup.css" rel="stylesheet">
  <!-- Theme CSS - Includes Bootstrap -->
  <link href="css/creative.min.css" rel="stylesheet">
  <style>
    .header {
      padding: 0;
    }
  </style>
  <script  type="text/javascript">
	 $(document).ready(function() {
      $("#form2").submit(function(e) {    
        e.preventDefault();    
        var form = $(this);
        var url = form.attr('action');        
        $.ajax({    
          type: "POST",
          url: "get_data1.php",             
          data: form.serialize(),
          success: function(response){                    
              $("#txtHint").html(response); 
          }
      });
      });
      });
	</script>
</head>
<body id="page-top">
  <!-- Navigation -->
  <?php
  include_once("navbar.php")
  ?>
  <header class="masthead">
    <div class="container h-50">
      <form name="form2"  method="POST" id="about" class="center_div container">
        <div class="form-row">
          <div class="form-group col-md-12">
            <br>
            <label for="mat_name">Material Name</label>
            <select id="mat_name" name="mat_name" class="form-control">
            <option value="">เลือกวัตถุดิบ</option>
              <?php
              $strSQL   = "SELECT id_mat,mat_name FROM mat_data";
              $objQuery = mysqli_query($con, $strSQL);
              while ($objResult = mysqli_fetch_array($objQuery)) {
                ?>
                <option value="<?php echo $objResult["id_mat"]; ?>"><?php echo $objResult["mat_name"]; ?></option>
              <?php
              }
              ?>
            </select>
          </div>
        </div>
        <div class="form-row">
          <div class="form-group col-md-9">
            <label for="mat_type">Material Type</label>
            <select id="mat_type" name="mat_type" class="form-control">
            <option value="">เลือกประเภท</option>
              <?php
              $strSQL   = "SELECT id_type,type_name FROM mat_type ";
              $objQuery = mysqli_query($con, $strSQL);
              while ($objResult = mysqli_fetch_array($objQuery)) {
                ?>
                <option value="<?php echo $objResult["id_type"]; ?>"><?php echo $objResult["type_name"]; ?></option>
              <?php
              }
              ?>
            </select>
          </div>
          
          <div class="form-group col-md-3 gg">
          <label for="gg">Status</label><br>
            <input name="rdoSex" type="radio" value="2">IN  
            <input name="rdoSex" type="radio" value="1">OUT  
            <input name="rdoSex" type="radio" value="3" checked>BOTH  
          </div>
          
        </div>
        <div class="form-row">
          <div class="form-group col-md-12">
            <label for="startdate">Activity Date </label>
            <input type="text" name="startdate" value="<?php echo date("Y/m/d"); ?>" id="startdate" class="startdate"/> To
              <script type="text/javascript">
                jQuery('#startdate').datepicker({
                  dateFormat: 'yy/mm/dd'
                });
              </script>
            <input type="text" name="enddate" value="<?php echo date("Y/m/d"); ?>" id="enddate" class="enddate"/><br>      
              <script type="text/javascript">
                jQuery('#enddate').datepicker({
                  dateFormat: 'yy/mm/dd'
                });
              </script>
          </div>
        </div>
        <button type="submit" class="btn btn-primary" id="fr" name="fr" value="1">Search</button>
      </form><br>
      
    </div><br><br>
    <div class="container">
    
    <br>
    
    <div id="txtHint"><b></b></div>
    
  </div>
  </header>
  
  <!-- Bootstrap core JavaScript -->
  <script src="vendor/jquery/jquery.min.js"></script>
  <script src="vendor/bootstrap/js/bootstrap.bundle.min.js"></script>
  <!-- Plugin JavaScript -->
  <script src="vendor/jquery-easing/jquery.easing.min.js"></script>
  <script src="vendor/magnific-popup/jquery.magnific-popup.min.js"></script>
  <!-- Custom scripts for this template -->
  <script src="js/creative.min.js"></script>
</body>
</html>
 
 
โค๊ดหน้า get_data1.php ครับ 
Code (PHP) 
 <?php
    if (!empty($_POST["mat_name"])) {
      $q = "AND mat_data.id_mat = " . $_POST["mat_name"] . "";
    } else {
      $q = "";
    }
      if (!empty($_POST["startdate"])) {
        if (!empty($_POST["enddate"])) {
          $l = "AND DATE(mat_tranfer.tranfer_date) BETWEEN '". $_POST["startdate"] . "' AND '". $_POST["enddate"] . "'";
        } else {
          $l = "AND DATE(mat_tranfer.tranfer_date) = '". $_POST["startdate"] . "'";
        } 
      } else {
        $l = "";
      }
      if (!empty($_POST["mat_type"])) {
        $j = "AND mat_data.id_type = " . $_POST["mat_type"] . "";
      } else {
        $j = "";
      }
      if (!empty($_POST["rdoSex"])) {
        $i = $_POST["rdoSex"];
        if ($i == 3) {
          $k = "";
        } else {
          $k = "AND mat_tranfer.tranfer_flg = " . $_POST["rdoSex"] . "";
        }
      } else {
        $k = "";
      }
      $strSQL = "SELECT mat_name,
      SUM(tranfer_out) as total_out,SUM(tranfer_in) as total_in
      FROM mat_tranfer
      JOIN mat_data
      ON mat_tranfer.id_mat = mat_data.id_mat
      WHERE del_tr_flg = 0   ".$j." ".$l." ".$q." " . $k . "
      GROUP BY mat_name";
      $dataPoints = array();
      $dataPoints1 = array();
      $objQuery = mysqli_query($con, $strSQL)  or die("Error Query [" . $strSQL . "]");
      while ($objResult = mysqli_fetch_array($objQuery)) {
        if (!empty($_POST["rdoSex"])) {
          $i = $_POST["rdoSex"];
          if ($i == 1) {
            $dataPoints[] = array("label"=>$objResult["mat_name"],"y"=>$objResult["total_out"] );
          } elseif ($i == 2) {
            $dataPoints[] = array("label"=>$objResult["mat_name"],"y"=>$objResult["total_in"] );
          } elseif ($i == 3){
            $dataPoints[] = array("label"=>$objResult["mat_name"],"y"=>$objResult["total_in"] );
            $dataPoints1[] = array("label"=>$objResult["mat_name"],"y"=>$objResult["total_out"] );
          }
        } else {
          
        }
      }
    ?>
    <script>
    window.onload = function () {
      var gg = "";
      var i = document.querySelector('input[name="rdoSex"]:checked').value ;
      if (i == 1){
        gg = "Material Out";
      }else if (i == 2){
        gg = "Material In";
      }else if (i == 3){
        gg = "Material In-Out";
      }
      if (i == 3) {
        var chart = new CanvasJS.Chart("chartContainer", {
        animationEnabled: true,
        theme: "light2", // "light1", "light2", "dark1", "dark2"
        title: {
          text: gg 
        },
        axisY: {
          title: "UNIT",
          includeZero: false
        },
        axisY2: {
          title: "OUT",
          includeZero: false
        },
        toolTip: {
		      shared: true
        },
       
        data: [{
          type: "column",
          name: "In",
          dataPoints: <?php echo json_encode($dataPoints, JSON_NUMERIC_CHECK); ?>
        },
        {
          type: "column",
          name: "Out",
          dataPoints: <?php echo json_encode($dataPoints1, JSON_NUMERIC_CHECK); ?>
        }
        ]
      });
      chart.render();
      }else{
      var chart = new CanvasJS.Chart("chartContainer", {
        animationEnabled: true,
        theme: "light2", // "light1", "light2", "dark1", "dark2"
        title: {
          text: gg 
        },
        axisY: {
          title: "Number of Unit Picking",
          includeZero: false
        },
        
        data: [{
          type: "column",
          name: "In",
          dataPoints: <?php echo json_encode($dataPoints, JSON_NUMERIC_CHECK); ?>
        }]
      });
      chart.render();
    }
    }
  </script>
    <div id="chartContainer" style="height: 370px; width: 100%;"></div>
    <script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
    <?php
    if (!empty($_POST["fr"])) {
      if ($_POST["fr"] == 1) {
        $q = "";
        $j = "";
        $k = "";
        if (!empty($_POST["mat_name"])) {
          $q = "AND mat_data.id_mat = " . $_POST["mat_name"] . "";
        } else {
          $q = "";
        }
        if (!empty($_POST["mat_type"])) {
          $j = "AND mat_data.id_type = " . $_POST["mat_type"] . "";
        } else {
          $j = "";
        }
        if (!empty($_POST["rdoSex"])) {
          $i = $_POST["rdoSex"];
          if ($i == 3) {
            $k = "";
          } else {
            $k = "AND mat_tranfer.tranfer_flg = " . $_POST["rdoSex"] . "";
          }
        } else {
          $k = "";
        }
        if (!empty($_POST["startdate"])) {
          if (!empty($_POST["enddate"])) {
            $l = "AND DATE(mat_tranfer.tranfer_date) BETWEEN '". $_POST["startdate"] . "' AND '". $_POST["enddate"] . "'";
          } else {
            $l = "AND DATE(mat_tranfer.tranfer_date) = '". $_POST["startdate"] . "'";
          } 
        } else {
          $l = "";
        }
        $strSQL = "SELECT (SELECT mat_name FROM mat_data WHERE mat_tranfer.id_mat = mat_data.id_mat)as mat,
            bfbalance,
            tranfer_in,
            tranfer_out,
            balance,
            (SELECT concat(fname,' ',lname) FROM pic_data WHERE mat_tranfer.id_pic_need = pic_data.id_pic) as pic,
            tranfer_date,
            (SELECT FORMAT(SUM((tranfer_in*inv_price)),'N2') FROM inv_data WHERE inv_data.id_inv = mat_tranfer.id_inv) as price_in,
            (SELECT FORMAT(SUM((tranfer_out*inv_price)),'N2')  FROM  inv_data WHERE inv_data.id_inv = mat_tranfer.id_inv) as price_out,
            (SELECT invoice  FROM  inv_data WHERE inv_data.id_inv = mat_tranfer.id_inv)as invoice,
            (SELECT inv_price  FROM  inv_data WHERE inv_data.id_inv = mat_tranfer.id_inv)as inv_price
            FROM mat_tranfer
            JOIN mat_data
            ON mat_tranfer.id_mat = mat_data.id_mat
            WHERE del_tr_flg = 0 " . $q . " " . $j . " " . $k . " ".$l."";
        $objQuery = mysqli_query($con, $strSQL)  or die("Error Query [" . $strSQL . "]");
        ?>
        <form  name="form2" action="exportcsvHis.php"  method="post" id="about" class="center_div container">
        <input type="text" name="sql" class="sql" id="sql" hidden value="<?php echo $strSQL; ?>">
      <button type="submit" class="btn btn-primary" value="">Export Excel</button>
      </form><br>
        <?php
        echo "<table class='table table-bordered table-striped table-hover'><tr class='thead-dark'><th>Material Name</th><th>B/F Balance</th><th>IN</th><th>Price_In</th><th>OUT</th><th>Price_Out</th><th>BALANCE</th><th>PICK PIC</th><th>invoice</th><th>Date</th></tr>";
     
        while ($objResult = mysqli_fetch_array($objQuery)) {
         
          
        
          echo "<tr >
                <td>" . $objResult["mat"] . "</td>
                <td>" . $objResult["bfbalance"] . "</td>
                <td>" . $objResult["tranfer_in"] . "</td>
                <td>" . $objResult["price_in"] . "</td>
                <td>" . $objResult["tranfer_out"] . "</td>
                <td>" . $objResult["price_out"] . "</td>
                <td>" . $objResult["balance"] . "</td>
                
                <td>" . $objResult["pic"] . "</td>
                <td>" . $objResult["invoice"] . "</td>
                <td>" . $objResult["tranfer_date"] . "</td>
                </tr>";
        }
        echo "</table>";
      }
    }
    ?>
 
 
  Tag : PHP, MySQL, Ajax, jQuery, XAMPP, Windows               
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  ประวัติการแก้ไข 2019-06-14 14:28:48 2019-06-14 14:35:23	
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                      | Date :
                          2019-06-14 14:18:59 | 
                      By :
                          realizejoke | 
                      View :
                          1503 | 
                      Reply :
                          10 | 
                     
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                 $("#form2").submit(function(e) {    
   ..... 
   ..... 
   ..... 
   return false; เพิ่มตรงนี้เข้าไป 
}); 
 
คือ event submit มันทำงาน โดยการเปลี่ยนหน้าเพจครับ ถ้าไม่อยากให้มันเปลี่ยนหน้าเพจ  
เมื่อทำงานเสร็จแล้ว คุณต้อง ส่งค่า cancel ด้วยการส่งค่า false กลับไปด้วย 
 
แต่ที่นิยมกันจริงๆ ก็คือการใช้ type button แทน type submit ลองอ่าน document ดูความแตกต่าง ของมันดูครับ 
ปล. มันมีรายละเอียดของการ ประกาศ form ด้วยนะครับ                        
               
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                        | Date :
                            2019-06-14 14:39:24 | 
                        By :
                            Chaidhanan | 
                         
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                   ตอบความคิดเห็นที่ : 1 เขียนโดย : Chaidhanan เมื่อวันที่ 2019-06-14 14:39:24 
รายละเอียดของการตอบ ::
  เปลี่ยนมาใช้ Button onlclick แล้วครับ แต่มีปัญหาใหม่คือ 
เหมือน ข้อมูลจาก PHP ไม่เข้า ไปใน script อ่ะครับต้องแก้ยังไงหรอครับ
 Code (PHP)
<?php
require_once("connect.php");
    $rdo = $_POST["rdoSex"];
    if (!empty($_POST["mat_name"])) {
      $q = "AND mat_data.id_mat = " . $_POST["mat_name"] . "";
    } else {
      $q = "";
    }
      if (!empty($_POST["startdate"])) {
        if (!empty($_POST["enddate"])) {
          $l = "AND DATE(mat_tranfer.tranfer_date) BETWEEN '". $_POST["startdate"] . "' AND '". $_POST["enddate"] . "'";
        } else {
          $l = "AND DATE(mat_tranfer.tranfer_date) = '". $_POST["startdate"] . "'";
        } 
      } else {
        $l = "";
      }
      if (!empty($_POST["mat_type"])) {
        $j = "AND mat_data.id_type = " . $_POST["mat_type"] . "";
      } else {
        $j = "";
      }
      if (!empty($_POST["rdoSex"])) {
        $i = $_POST["rdoSex"];
        
        if ($i == 3) {
          $k = "";
        } else {
          $k = "AND mat_tranfer.tranfer_flg = " . $_POST["rdoSex"] . "";
        }
      } else {
        $k = "";
      }
      $strSQL = "SELECT mat_name,
      SUM(tranfer_out) as total_out,SUM(tranfer_in) as total_in
      FROM mat_tranfer
      JOIN mat_data
      ON mat_tranfer.id_mat = mat_data.id_mat
      WHERE del_tr_flg = 0  ".$j." ".$l." ".$q." " . $k . "
      GROUP BY mat_name";
      $dataPoints = array();
      $dataPoints1 = array();
      $objQuery = mysqli_query($con, $strSQL)  or die("Error Query [" . $strSQL . "]");
      while ($objResult = mysqli_fetch_array($objQuery)) {
        if (!empty($_POST["rdoSex"])) {
          $i = $_POST["rdoSex"];
          if ($i == 1) {
            $dataPoints[] = array("label"=>$objResult["mat_name"],"y"=>$objResult["total_out"] );
          } elseif ($i == 2) {
            $dataPoints[] = array("label"=>$objResult["mat_name"],"y"=>$objResult["total_in"] );
          } elseif ($i == 3){
            $dataPoints[] = array("label"=>$objResult["mat_name"],"y"=>$objResult["total_in"] );
            $dataPoints1[] = array("label"=>$objResult["mat_name"],"y"=>$objResult["total_out"] );
          }
        } else {
          
        }
      }
      
    ?>
    <script>
    function cht () {
      var gg = "";
      var i = <?php echo json_encode($rdo,JSON_NUMERIC_CHECK) ?>;
      if (i == 1){
        gg = "Material Out";
      }else if (i == 2){
        gg = "Material In";
      }else if (i == 3){
        gg = "Material In-Out";
      }
      if (i == 3) {
        var chart = new CanvasJS.Chart("chartContainer", {
        animationEnabled: true,
        theme: "light2", // "light1", "light2", "dark1", "dark2"
        title: {
          text: gg 
        },
        axisY: {
          title: "UNIT",
          includeZero: false
        },
        axisY2: {
          title: "OUT",
          includeZero: false
        },
        toolTip: {
		      shared: true
        },
       
        data: [{
          type: "column",
          name: "In",
          dataPoints: <?php echo json_encode($dataPoints, JSON_NUMERIC_CHECK); ?>
        },
        {
          type: "column",
          name: "Out",
          dataPoints: <?php echo json_encode($dataPoints1, JSON_NUMERIC_CHECK); ?>
        }
        ]
      });
      chart.render();
      }else{
      var chart = new CanvasJS.Chart("chartContainer", {
        animationEnabled: true,
        theme: "light2", // "light1", "light2", "dark1", "dark2"
        title: {
          text: gg 
        },
        axisY: {
          title: "Number of Unit Picking",
          includeZero: false
        },
        
        data: [{
          type: "column",
          name: "In",
          dataPoints: <?php echo json_encode($dataPoints, JSON_NUMERIC_CHECK); ?>
        }]
      });
      chart.render();
    }
    }
    cht();
  </script>
    <div id="chartContainer" style="height: 400px; width: 100%;"></div>
    
    <?php
    if (!empty($_POST["fr"])) {
      if ($_POST["fr"] == 1) {
        $q = "";
        $j = "";
        $k = "";
        if (!empty($_POST["mat_name"])) {
          $q = "AND mat_data.id_mat = " . $_POST["mat_name"] . "";
        } else {
          $q = "";
        }
        if (!empty($_POST["mat_type"])) {
          $j = "AND mat_data.id_type = " . $_POST["mat_type"] . "";
        } else {
          $j = "";
        }
        if (!empty($_POST["rdoSex"])) {
          $i = $_POST["rdoSex"];
          if ($i == 3) {
            $k = "";
          } else {
            $k = "AND mat_tranfer.tranfer_flg = " . $_POST["rdoSex"] . "";
          }
        } else {
          $k = "";
        }
        if (!empty($_POST["startdate"])) {
          if (!empty($_POST["enddate"])) {
            $l = "AND DATE(mat_tranfer.tranfer_date) BETWEEN '". $_POST["startdate"] . "' AND '". $_POST["enddate"] . "'";
          } else {
            $l = "AND DATE(mat_tranfer.tranfer_date) = '". $_POST["startdate"] . "'";
          } 
        } else {
          $l = "";
        }
        $strSQL = "SELECT (SELECT mat_name FROM mat_data WHERE mat_tranfer.id_mat = mat_data.id_mat)as mat,
            bfbalance,
            tranfer_in,
            tranfer_out,
            balance,
            (SELECT concat(fname,' ',lname) FROM pic_data WHERE mat_tranfer.id_pic_need = pic_data.id_pic) as pic,
            tranfer_date,
            (SELECT FORMAT(SUM((tranfer_in*inv_price)),'N2') FROM inv_data WHERE inv_data.id_inv = mat_tranfer.id_inv) as price_in,
            (SELECT FORMAT(SUM((tranfer_out*inv_price)),'N2')  FROM  inv_data WHERE inv_data.id_inv = mat_tranfer.id_inv) as price_out,
            (SELECT invoice  FROM  inv_data WHERE inv_data.id_inv = mat_tranfer.id_inv)as invoice,
            (SELECT inv_price  FROM  inv_data WHERE inv_data.id_inv = mat_tranfer.id_inv)as inv_price
            FROM mat_tranfer
            JOIN mat_data
            ON mat_tranfer.id_mat = mat_data.id_mat
            WHERE del_tr_flg = 0 " . $q . " " . $j . " " . $k . " ".$l."";
        $objQuery = mysqli_query($con, $strSQL)  or die("Error Query [" . $strSQL . "]");
        ?>
        <form  name="form2" action="exportcsvHis.php"  method="post" id="about" class="center_div container">
        <input type="text" name="sql" class="sql" id="sql" hidden value="<?php echo $strSQL; ?>">
      <button type="submit" class="btn btn-primary" value="">Export Excel</button>
      </form><br>
        <?php
        echo "<table class='table table-bordered table-striped table-hover'><tr class='thead-dark'><th>Material Name</th><th>B/F Balance</th><th>IN</th><th>Price_In</th><th>OUT</th><th>Price_Out</th><th>BALANCE</th><th>PICK PIC</th><th>invoice</th><th>Date</th></tr>";
     
        while ($objResult = mysqli_fetch_array($objQuery)) {
         
          
        
          echo "<tr >
                <td>" . $objResult["mat"] . "</td>
                <td>" . $objResult["bfbalance"] . "</td>
                <td>" . $objResult["tranfer_in"] . "</td>
                <td>" . $objResult["price_in"] . "</td>
                <td>" . $objResult["tranfer_out"] . "</td>
                <td>" . $objResult["price_out"] . "</td>
                <td>" . $objResult["balance"] . "</td>
                
                <td>" . $objResult["pic"] . "</td>
                <td>" . $objResult["invoice"] . "</td>
                <td>" . $objResult["tranfer_date"] . "</td>
                </tr>";
        }
        echo "</table>";
      }
    }
    ?>
                        
               
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                        | Date :
                            2019-06-14 15:50:13 | 
                        By :
                            realizejoke | 
                         
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                 วิวซอร์ส บันทัดนี้จาก browser มาดูก่อนไหมครับ เน้นนะครับ จาก browser 
จะได้รู้ว่ามันได้ค่าอะไรมา และจะได้เขียน if else ได้ถูกต้อง 
 
var i = <?php echo json_encode($rdo,JSON_NUMERIC_CHECK) ?>; 
if (i == 1){                        
               
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                        | Date :
                            2019-06-14 16:19:48 | 
                        By :
                            Chaidhanan | 
                         
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                 onclick ตรงไหนผมหาไม่เห็นมี?                        
               
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                        | Date :
                            2019-06-14 16:20:45 | 
                        By :
                            mr.v | 
                         
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                 ใช่เหรอ ครับ มัน มี $dataPoints ตรงไหน  
 
var i = <?php echo json_encode($rdo,JSON_NUMERIC_CHECK) ?>; 
if (i == 1){ 
 
 
Undefined variable: dataPoints 
 
แต่ก็ต้องแก้ไขเหมือนกัน เพราะมันหา ตัวแปร $dataPoint ไม่เจอ สรุปคือผิดหลายแห่งเรื่องการใช้ ตัวแปร                        
               
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                        | Date :
                            2019-06-14 16:26:43 | 
                        By :
                            Chaidhanan | 
                         
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                 แก้ได้แล้วครับ ตรง <input id="rdoSex" name="rdoSex" type="radio" value="2">IN ผมลืมใส่ Tag ID เพราะตรงเรียกตัวแปรมันดึงค่าแบบ ID                        
               
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                        | Date :
                            2019-06-14 16:58:45 | 
                        By :
                            realizejoke | 
                         
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                 รอง เขียนตรวจสอบแบบนี้ดู 
 
Code (PHP) 
$rdo = isset($_POST["rdoSex"]) ? trim($_POST["rdoSex"]) : '';
if($rdo==''){
   echo 'not found rdoSex'; exit; // หรืออะไรก็ว่าไป แค่เขียน algorithm ให้มันครอบคลุมมากยิ่งขึ้น โค๊ดยาวช่างมันไปก่อน
}
                        
               
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                        | Date :
                            2019-06-14 17:04:22 | 
                        By :
                            Chaidhanan | 
                         
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                 ที่ submit แล้วเปลี่ยนหน้า เพราะคุณเขียนว่า $("form2") หมายถึง คุณอ้างอิงถึง form ที่มี id เป็น form2 
แต่ form คุณ มี id เป็น about ก็เลยไม่เข้า function submit นะครับ 
พอไม่เข้า function ทำให้ในส่วน e.preventDefault() ไม่ทำงาน                        
               
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                        | Date :
                            2019-06-15 22:35:21 | 
                        By :
                            ... | 
                         
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