[英]Data transfer between php pages using sessions
我正在嘗試使用會話在php頁面之間傳輸數據。 我的代碼如下:
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] ";
}
?>
名稱和年齡顯示在最后一頁(page2.php)。 該主題不會傳遞到下一頁。 我在這里犯什么錯誤?
任何幫助,將不勝感激!!!
您提供的代碼存在一些問題,因此我重寫了您的代碼,您可以嘗試以下代碼:
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');
}
}
說明 :
您希望用戶在提交表單后選擇一個主題,並在用戶無法檢查主題時對其進行定義(第33行)。當用戶無法定義變量時,您可以繼續操作-但有錯誤-這就是我得到的內容我嘗試了您的代碼。
所以我要做的是以下步驟:
$_SESSION
變量(作為包含所需信息的數組) 然后,當您選擇一個(或多個)主題時,它們也會在會話中保存:
page2.php文件:
<?php
session_start();
if(isset($_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');
}
在page2.php
我檢查是否設置了詳細信息。 如果是,那么我們可以繼續檢查主題是否也已設置。 如果未設置詳細信息,則連接將終止並顯示錯誤消息。 如果您沒有設置主題,您也會收到一條有關此主題的消息。
重要的提示:
您可以用此代碼替換當前代碼。
希望對您有所幫助
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