Question

我有一个表单，它将输入值捕获为会话参数。一个输入特别是具有5种不同选项（手机运营商）的选择。我希望表单提交id（carrier_id），但在确认页面上回显相关值（carrier_name）。

这样的事情：

<form action="confirm_form.php" role="form"> 
<div class="form-group">
<label for="carrier>Select Carrier</label>
<select type="text" class="form-control" name="carrier" value="">
    <?php 
         $q = "SELECT * FROM carriers";
         $carriers = mysqli_query($con, $q);
    while($row = mysqli_fetch_assoc($carriers)) {
$carrier_id = $row['car_id'];
$carrier_name = $row['car_name'];

 echo "<option value='$carrier_id'>$carrier_name</option>";
 }
 ?>
</select>
</div>
<button type="submit" value="submit" name="submit">Add customer</button>
</form>


$carrier = mysqli_real_escape_string($con, $_SESSION['carrier']);

confirm_form.php页面应该回显载波名称但是当我尝试它时输出carrier_id或空白。请帮忙。

我还假设这个快速概述中的其他因素我没有输入。（我已经有了session_start（）;为了一个而调用了

Answer 1

主要表单和设置方法帖子

<?php 
  session_start();
  if(isset($_POST['carrier'])){
    $_SESSION['carrier']=$_POST['carrier'];
    $carrier = mysqli_real_escape_string($con, $_SESSION['carrier']);

    //Then query here.........

   echo $_SESSION['carrier'];
  }

?>

<强> confirm_form.php

D <- data.frame(
  c("pr1","pr2","pr3","pr4"),
  c(0.1,0.0,0.3,0.2),
  c(0.2,0.1,0.3,0.4),
  c(0.2,0.1,0.3,0.4)
)

colnames(D) <- c("id", 1:(ncol(D)-1))

library(reshape2) # for melt function
D2 <- melt(D, value.name="id")

回声相关的行值

1 个答案: