我正在尝试使用session在php页面之间传输数据。我的代码如下:
check_code.php:
<?php
session_start();
echo "<form action=\"check_code.php\" method=\"post\">";
echo "<h2>Your Name. *</h2><input type='text' name='user_name'>";
echo "<br><br>";
echo "<h2>Your age. *</h2><input type='text' name='age'>";
echo "<br><br>";
echo "<br><br><br>";
echo "<div><input type='submit' value='Review'></div>";
echo "</form>";
?>
<?php
if((empty($_POST['user_name'])) || (empty($_POST['age'])) ) {
echo "<h2>Please enter your user name and age</h2>";
} else {
echo "<form action=\"page2.php\" method=\"post\">";
$user_name = $_POST['user_name'];
$age = $_POST['age'];
echo "Below are the details entered:<br>";
echo "Name: $user_name";
echo "Age: $age";
echo "Select any one: ";
echo '<td bgcolor="#EAEAEA" style="color:#003399"><input type="checkbox"
name="subject[]" value="Science">Science</td>';
echo '<td bgcolor="#EAEAEA" style="color:#003399"><input type="checkbox"
name="subject[]" value="Math">Math</td>';
echo "<br>";
$_SESSION['user'] = $_POST['user_name'];
$_SESSION['age'] = $_POST['age'];
$_SESSION['subject'] = $_POST['subject'];
echo "<input type=\"submit\" value='Add to DB' >";
echo "</form>";
}
?>
使page2.php:
<?php
session_start();
$user_name = $_SESSION['user'];
$age = $_SESSION['age'];
$subject = $_SESSION['subject'];
echo "<h2>Below are the details entered:</h2><br>";
echo "<h2>Name: </h2>$user_name";
echo "<h2>Age: </h2>$age";
echo "<h2>Subject selected: </h2>";
for ($i=0;$i<sizeof($subject);$i++) {
echo " $subject[$i] ";
}
?>
姓名和年龄显示在最后一页(page2.php)中。主题不会传递到下一页。我在这里犯了什么错误?
任何帮助将不胜感激!!!
答案 0 :(得分:0)
您提供的代码存在一些问题,因此我重写了您的代码,您可以尝试下面的代码:
check_code.php 文件:
<?php session_start(); ?>
<form method="POST" action="<?php echo $_SERVER['REQUEST_URI']; ?>">
<label>Your name</label>
<input type="text" name="name" />
<br>
<label>Your age</label>
<input type="number" name="age" />
<hr>
<button type="submit" name="review">Review</button>
<?php if(isset($_SESSION['details'])) { ?>
<button type="submit" name="unset">Unset</button>
<?php } ?>
</form>
<?php
if(isset($_SESSION['details'])) {
if(isset($_POST['unset'])) { // If pressed "unset", remove the session and the values and restart
unset($_SESSION);
session_destroy();
}
}
if(isset($_POST['review'])) {
if(!empty($_POST['name']) && !empty($_POST['age'])) { // If fields are not empty
?>
<p>Your Details:</p>
<table>
<tr>
<td>Name<td>
<td><?php echo $_POST['name']; ?></td>
</tr>
<tr>
<td>Age<td>
<td><?php echo $_POST['age']; ?></td>
</tr>
</table>
<?php
$_SESSION['details'] = array(
'name' => $_POST['name'],
'age' => $_POST['age']
// Storing them in array as $_SESSION['details'][name/age/whatever]
);
}
else {
echo 'Please fill in the fields.';
}
}
if(isset($_SESSION['details'])) {
?>
<p><?php echo $_SESSION['details']['name']; /* Stored name in session */ ?>, Please Select Subject:</p>
<form method="POST" action="<?php echo $_SERVER['REQUEST_URI']; ?>">
<label>Science</label>
<input type="checkbox" name="subject[]" value="science" />
<br>
<label>Math</label>
<input type="checkbox" name="subject[]" value="math" />
<hr>
<button type="submit" name="send">Remember My Choice</button>
</form>
<?php
if(isset($_POST['send'])) { // If you send the second form, then...
if(isset($_POST['subject'])) { // If selected subject
$_SESSION['subject'] = array();
for($i = 0; $i < count($_POST['subject']); $i++) {
$_SESSION['subject'][] = $_POST['subject'][$i]; // store all values of "subject" in the session
}
}
header('location: page2.php');
}
}
<强>解释强>:
您希望用户在提交表单后选择主题,并在用户无法检查主题行时定义它。当用户无法定义变量时,您可以继续 - 但是有错误 - 这就是我在尝试你的代码时所得到的。
所以我做的是以下步骤:
$_SESSION
变量;详细信息&#34; (作为包含所需信息的数组)然后,当您选择一个(或多个)科目时,他们也会在会话中保存:
page2.php 文件:
<?php
session_start();
if(isset($_SESSION['details'])) {
?>
<p>Your name is <?php echo $_SESSION['details']['name']; ?> and your age is <?php echo $_SESSION['details']['age']; ?></p>
<?php if(isset($_SESSION['subject'])) { ?>
<p>And your subject(s) are <?php echo implode(', ', $_SESSION['subject']); ?></p>
<?php } else { ?>
<p>You don't have any subject</p>
<?php
}
}
else {
die('An Error Occurred');
}
开page2.php
我检查了是否设置了详细信息。如果是,那么我们可以继续检查是否也设置了主题。如果未设置详细信息,连接将死亡并打印错误消息。如果您没有设置主题,您也会收到有关该主题的消息。
重要提示:
您可以使用此代码替换当前代码。
我希望它会有所帮助