Question

嗨，我有这个并且工作正常，除了以下问题。

  echo "<form method='post' action=''>";
  echo "  <input type='text' name='txt1' id='txt1' value=".$_SESSION['txt1'].">";
  echo "  <input type='submit' name='sendtwo' id='sendtwo' value='TwoClick'>";
  echo "</form>";
<A submit button here to send the form data>

问题是，如果我在提交表单时在John文本框中有值，则会在文本框中保留原始用户输入的单词Jonn。但是，如果用户键入John Carter，则在提交表单时，它仅保留John。换句话说，文本只能到文本之间的第一个空格。我如何保留整篇文章？

修改

<?php
  if(isset($_POST['sendone']))
  {
    echo "Hello";
    echo "<form method='post' action=''>";
    echo "  <input type='text' name='txt1' id='txt1'>";
    echo "  <input type='submit' name='sendtwo' id='sendtwo' value='TwoClick'>";
    echo "</form>";
  }
  if(isset($_POST['sendtwo']))
  {
    if($_POST['txt1']=='')
    {
      echo "Hello";
      echo "<form method='post' action=''>";
      echo "  <input type='text' name='txt1' id='txt1'>";
      echo "  <input type='submit' name='sendtwo' id='sendtwo' value='TwoClick'>";
      echo "</form>";
      echo "Empty";
    }
    else
    {
      $_SESSION['txt1'] = $_POST['txt1'];
      echo "Hello";
      echo "<form method='post' action=''>";
      echo "  <input type='text' name='txt1' id='txt1' value=".$_SESSION['txt1'].">";
      echo "  <input type='submit' name='sendtwo' id='sendtwo' value='TwoClick'>";
      echo "</form>";
      echo "Hit success!";      
    }
  }
  ?>

Answer 1

value= echo _SESSION["txt1"]时，您需要在<?php if(isset($_POST['sendone'])) { echo "Hello"; echo "<form method='post' action=''>"; echo " <input type='text' name='txt1' id='txt1'>"; echo " <input type='submit' name='sendtwo' id='sendtwo' value='TwoClick'>"; echo "</form>"; } if(isset($_POST['sendtwo'])) { if($_POST['txt1']=='') { echo "Hello"; echo "<form method='post' action=''>"; echo " <input type='text' name='txt1' id='txt1'>"; echo " <input type='submit' name='sendtwo' id='sendtwo' value='TwoClick'>"; echo "</form>"; echo "Empty"; } else { $_SESSION['txt1'] = $_POST['txt1']; echo "Hello"; echo "<form method='post' action=''>"; // check out this line here: echo " <input type='text' name='txt1' id='txt1' value='" . htmlspecialchars($_SESSION['txt1']) . "'>"; echo " <input type='submit' name='sendtwo' id='sendtwo' value='TwoClick'>"; echo "</form>"; echo "Hit success!"; } } ?> attribue的值周围添加单引号，否则生成的HTML无效..就像这样：

echo

尽管如此，在可能的情况下使用普通HTML并且只使用{{1}}来表示您希望包含的变量更为高效（并且可读！）是值得的。

Answer 2

检查此代码。

<form name="" method="post">
<input type="text" name="txt1">
<input type="submit" name="sendtwo">
<input type="submit" name="sendone">
</form>

<?php
  if(isset($_POST['sendone']))
  {
    echo "Hello";
    echo "<form method='post' action=''>";
    echo "  <input type='text' name='txt1' id='txt1'>";
    echo "  <input type='submit' name='sendtwo' id='sendtwo' value='TwoClick'>";
    echo "</form>";
  }
  if(isset($_POST['sendtwo']))
  {
    if($_POST['txt1']=='')
    {
      echo "Hello";
      echo "<form method='post' action=''>";
      echo "  <input type='text' name='txt1' id='txt1'>";
      echo "  <input type='submit' name='sendtwo' id='sendtwo' value='TwoClick'>";
      echo "</form>";
      echo "Empty";
    }
    else
    {
      $_SESSION['txt1'] = $_POST['txt1'];
      echo "Hello";
      echo "<form method='post' action=''>";

      // check out this line here:
      echo "  <input type='text' name='txt1' id='txt1' value='" . $_SESSION['txt1'] . "'>";

      echo "  <input type='submit' name='sendtwo' id='sendtwo' value='TwoClick'>";
      echo "</form>";
      echo "Hit success!";      
    }
  }
?>

使用session来保留PHP中的文本框值

2 个答案: