<?php
include  'conn.php';



  if (isset($_POST['action'])) {
       $linehao=$_POST['linehao'];
       $dianji=$_POST['dianji'];
       
       
               $sqldd = "SELECT * FROM xiao     WHERE  `linehao` = '" . $linehao . "' ";
$resultdd = $conn->query($sqldd);
       if ($resultdd->num_rows > 0) {
    // 输出数据
    while($rowdd = $resultdd->fetch_assoc()) {
        $dianji=$rowdd['dianji']+1;
        
    }}
       
       
       
   $sqlxg ="UPDATE   `xiao` SET  `dianji` = '" . $dianji. "'    WHERE  `linehao` = '" . $linehao . "'";
   if ($conn->query($sqlxg) === TRUE) {
  }
      
  }