ส่วนนี้ คือ ฟอร์มที่ใช้รับข้อมูลครับ
<form action="search_date.php" method="post" name="date">
    &nbsp;&nbsp;Start Date<br/>
    &nbsp;&nbsp;
    <input name="startdate" type="text" class="form-control" id="startdate" />
    <br/>
    &nbsp;&nbsp;End Date<br/>
    &nbsp;&nbsp;<input name="enddate" type="text" class="form-control" id="enddate" /><br/>
    &nbsp;&nbsp;<button name="btnSeacrch" type="submit" class="btn btn-warning" id="btnSeacrch"><i class="icon-search"></i>&nbsp;Search</button>
  </form>

---

ส่วนนี้คือ code ครับ รบกวนผู้รู้แนะนำหน่อยครับ ปรับเปลี่ยน หรือ ผิดตรงไหน ช่วยทีครับ มือใหม่หัดแกะ php
ปล copy code เค้ามาอีกที
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
  if (PHP_VERSION < 6) {
    $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
  }

  $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);

  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;    
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  }
  return $theValue;
}
}

$currentPage = $_SERVER["PHP_SELF"];

$colname_Search = "-2";
if (isset($_POST['startdate'])) {
  $colname_Search1 = $_POST['startdate'];
}
if (isset($_POST['enddate'])) {
  $colname_Search2 = $_POST['enddate'];
}
mysql_select_db($database_IT, $IT);
$query_Search = sprintf("SELECT * FROM claim WHERE f_branchdate>=$colname_Search1 and f_branchdate<=$colname_Search2", GetSQLValueString("%" . $colname_Search1 . "%", "text")&& GetSQLValueString("%" . $colname_Search2 . "%", "text") );
$Search = mysql_query($query_Search, $IT) or die(mysql_error());
$row_Search = mysql_fetch_assoc($Search);
$totalRows_Search = mysql_num_rows($Search);

$queryString_Search = "";
if (!empty($_SERVER['QUERY_STRING'])) {
  $params = explode("&", $_SERVER['QUERY_STRING']);
  $newParams = array();
  foreach ($params as $param) {
    if (stristr($param, "pageNum_Search") == false &&
        stristr($param, "totalRows_Search") == false) {
      array_push($newParams, $param);
    }
  }
  if (count($newParams) != 0) {
    $queryString_Search = "&" . htmlentities(implode("&", $newParams));
  }
}
$queryString_Search = sprintf("&totalRows_Search=%d%s", $totalRows_Search, $queryString_Search);
?>