Question

我在按下提交后在文本字段中保留文本时遇到问题。我正在使用这个：

 <input name="date" type="text" id="date" <?php if(isset($_POST['date'])){echo 'value="'.$_POST['date'].'"';} ?>/>

我也成功提交了这个，以便重新加载表格，但也删除了上面的内容，因为它很新鲜。

echo "Succesfully added transaction. Updating table...";
echo "<META HTTP-EQUIV=\"refresh\" CONTENT=\"6\">";

我的整个代码=

 <?php

                     //  if ('POST' === $_SERVER['REQUEST_METHOD'])
                     if (isset($_POST['submit2']))

{
$con = mysql_connect("xx","xx_xx","xx");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db("xx_xx", $con);


$date = $_POST['date'];

$_SESSION['date'] = $_POST;

//Writes the to the server 

$sql = mysql_query("INSERT INTO `reservation__date` (`reservation_id`, `reservation_date`) 
VALUES
 ('000', '$date')") or die(mysql_error()); 
$query = mysql_query($sql);
if ($_SERVER['REQUEST_METHOD'] === 'POST')
{

$_SESSION['DATE'] = $_REQUEST['date'];
echo "Succesfully added transaction. Updating table...";
echo "<META HTTP-EQUIV=\"refresh\" CONTENT=\"6\">";  
mysql_close($con);
}
}

?>

Answer 1

如果您遵循PRG原则（POST-redirect-GET），则需要在会话中跟踪POST数据。

我假设你在提交后做了类似的事情：

if (POST is fine) {

  do something;
  redirect;

} else {

  re-render page and show feedback

}

由于服务器将丢弃重定向上的任何POST数据，因此您需要在每次提交时跟踪POST数据，并在页面加载（GET）时重新填充POST数据。

$_SESSION['user_POST'] = $_POST;

if (POST is fine) ...

在包含要提交的表单的页面上：

if (isset($_SESSION['user_POST']) {
  $_POST = $_SESSION['user_POST'];
}

忽略语法，我不是那么多PHP。

Answer 2

这是您的要求

<?php
session_start();

if(isset($_REQUEST['date'])){

$_SESSION['date'] = $_REQUEST['date'];
echo "Succesfully added transaction. Updating table...";
echo "<META HTTP-EQUIV=\"refresh\" CONTENT=\"6\">";
}
?>

<form method="post">
<input name="date" type="text" id="date" value="<?php echo $_SESSION['date'];?>" />
<input type="submit" name="submit" />
</form>

Answer 3

FOR TESTING

<?php  echo $_POST['date']; ?>

如果以上是正确的话，尝试设置为等于

<input name="date" type="text" id="date" <?php if(isset($_POST['date']) === true){echo 'value="'.$_POST['date'].'"';} ?>/>

Answer 4

如果您正在使用会话变量..请在页面顶部使用session_start(); ..
检查表单中是否有 method =“POST”，因为默认为GET ..
检查天气是否有<form action="abc.php">
如果要将文本放入值中，请更好地检查value属性中的条件并回显该值。因为即使您没有在HTML插入标记中写入值，也需要value=""。这会在以后造成模棱两可的情况。

做得更好

<form action="abc.php" method="post" >

<input name="date" type="text" id="date" value="<?php if(isset($_POST['date'])){echo $_POST['date'];} ?>" />
 .......................
</form

现在在abc.php

<?php

 session_start(); // as you are using session variables..

 if (isset($_POST['submit2']))

{
$con = mysql_connect("xx","xx_xx","xx");
 if (!$con)
 {
      die('Could not connect: ' . mysql_error());
 }

 mysql_select_db("xx_xx", $con);


$date = $_POST['date'];

$_SESSION['date'] = $_POST['date']; // POST is an array carrying many elements so be specific which element you want. inthis case it is $_POST['date'];

//Writes the to the server 

$sql = mysql_query("INSERT INTO `reservation__date` (`reservation_id`, `reservation_date`) VALUES ('000', '$date')") or die(mysql_error()); 
$query = mysql_query($sql);

 if ($_SERVER['REQUEST_METHOD'] === 'POST')
{

 $_SESSION['DATE'] = $_REQUEST['date'];

 echo "Succesfully added transaction. Updating table...";

 echo "<META HTTP-EQUIV=\"refresh\" CONTENT=\"6\">";  

 mysql_close($con);
}
}

?>

希望这会对你有所帮助......

提交后在文本字段中保留文本

4 个答案: