我的 php 代码有问题。我有 2 个 html 表单，我需要在用户提交每个表单后在输入中显示输入数据。我有一个问题，用户提交表单 1 的数据正确显示在表单中，但是当用户提交表单 2 时，表单 1 中的数据被删除，我希望两个表单都显示输入数据。下面是用于演示的简化代码。
<?php
$name1 = "";
$email1 = "";
$name2 = "";
$email2 = "";
?>
<?php
if (isset($_POST['submit1'])) {
$name1 = $_POST['name1'];
$email1 = $_POST['email1'];
}
if (isset($_POST['submit2'])) {
$name2 = $_POST['name2'];
$email2 = $_POST['email2'];
}
?>
<form action="index.php" method="post">
Name: <input type="text" name="name1" value="<?php echo $name1; ?>"><br>
E-mail: <input type="text" name="email1" value="<?php echo $email1; ?>"><br>
<input type="submit" value="send" name="submit1">
</form>
<form action="index.php" method="post">
Name: <input type="text" name="name2" value="<?php echo $name2; ?>"><br>
E-mail: <input type="text" name="email2" value="<?php echo $email2; ?>"><br>
<input type="submit" value="send" name="submit2">
</form>
您可以使用 PHP 会话。提交页面上的表单后，您可以将 $_POST 变量存储在 $_SESSION 中，然后只存储 $_SESSION 变量来填写表单。请参见下面的代码：
<?php
session_start(); //start the session
if(isset($_POST)){ //check to see if a form has been submitted
// merge the $_SESSION & $_POST arrays,
// this will overwrite session variables with new post variables but keep old post variables that haven't been submitted
$_SESSION = array_merge($_SESSION,$_POST);
}
$name1 = "";
$email1 = "";
$name2 = "";
$email2 = "";
?>
<?php
if (isset($_SESSION['submit1'])) { //uses $_SESSION instead of $_POST
$name1 = $_SESSION['name1'];
$email1 = $_SESSION['email1'];
}
if (isset($_SESSION['submit2'])) { //uses $_SESSION instead of $_POST
$name2 = $_SESSION['name2'];
$email2 = $_SESSION['email2'];
}
?>
<form action="index.php" method="post">
Name: <input type="text" name="name1" value="<?php echo $name1; ?>"><br>
E-mail: <input type="text" name="email1" value="<?php echo $email1; ?>"><br>
<input type="submit" value="send" name="submit1">
</form>
<form action="index.php" method="post">
Name: <input type="text" name="name2" value="<?php echo $name2; ?>"><br>
E-mail: <input type="text" name="email2" value="<?php echo $email2; ?>"><br>
<input type="submit" value="send" name="submit2">
</form>
如果您有任何问题，请告诉我。
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