如何使用相同的名称从POST变量中获取多个值

When user inputs text in 'ctext' field and press accept, I want to fill the value=" " field with user input, i achieved this but it fills all the value fields of same name in the page, how can i achieve it for different value of different ctext input? Anyone please give me solution with example, Many thanks

当用户在'ctext'字段中输入文本并按下accept时，我想用用户输入填充value =“”字段，我实现了这个但是它填充了页面中同名的所有值字段，我怎样才能实现它不同ctext输入的不同值？有人请给我解决方案，非常感谢

<?php

$connect = mysqli_connect('localhost', 'root', 'root123', 'font');
$query = 'SELECT * FROM pens ORDER by id ASC';
$result = mysqli_query($connect, $query);

if($result):
    if(mysqli_num_rows($result)>0):
        $i=0;
        while( $pen = mysqli_fetch_assoc($result) ):
        ?>
        <form method="post" action="<?php echo $_SERVER['PHP_SELF'];?>?action=add&id=<?php echo $pen['id']; ?>">

            <div class="name pen-<?php echo $pen['id']; ?>">
                <input type="text" name="ctext[]" class="form-control" placeholder="Type your text here" value="<?php $ctext = false; if(isset($_POST['ctext'])){ $ctext = $_POST['ctext']; } echo $ctext[$i]; ?>"></input>
                <input type="hidden" name="id" value="<?php $pen['id']?>"></input>
            </div>

            <div class="btn-custom">
                <input type="submit" name="add_to_cart" class="btn btn-block" value="Accept"></input>
            </div>      
        </form>
        <?php
        $i++;
        endwhile;
    endif;
endif;

？>

3 个解决方案

#1

I hope I understand what you want. You want to access the ctext for each individual $pen when printing the corresponding form.

我希望我明白你想要的。您希望在打印相应表单时访问每个$ pen的ctext。

You just need to name your <input> with a unique name and then access that value when printing. A possible solution is this:

您只需要使用唯一名称命名，然后在打印时访问该值。一个可能的解决方案是：

<input type="text" name="ctext[<?php echo $pen['id']; ?>]" class="form-control" placeholder="Type your text here" value="<?php $ctext = ''; if(isset($_POST['ctext'][$pen['id']])){ $ctext = $_POST['ctext'][$pen['id']]; } echo $ctext; ?>"></input>

What does it do?

它有什么作用？

name="ctext[<?php echo $pen['id']; ?>]" ensures a unique name for each $pen. For a $pen with id 1 this will result in name="ctext[1]".
name =“ctext [<？php echo $ pen ['id'];？>]”确保每个$ pen的唯一名称。对于id为1的$ pen，这将导致name =“ctext [1]”。
if(isset($_POST['ctext'][$pen['id']])){ $ctext = $_POST['ctext'][$pen['id']]; } uses $pen['id'] to look up the corresponding value in $_POST['ctext'].
if（isset（$ _ POST ['ctext'] [$ pen ['id']]））{$ ctext = $ _POST ['ctext'] [$ pen ['id']];使用$ pen ['id']查找$ _POST ['ctext']中的相应值。

By the way, when outputting user input you should always escape it, e.g. with htmlspecialchars. This will look like this: echo htmlspecialchars($ctext); That way malicious input like "><script>alert('Hello!')</script> won't execute the javascript.

顺便说一句，当输出用户输入时，你应该总是逃避它，例如与htmlspecialchars。这将是这样的：echo htmlspecialchars（$ ctext）;这样，像“>

Update: as requested a solution using session to store data:

更新：根据请求使用会话存储数据的解决方案：

<?php

$connect = mysqli_connect('localhost', 'root', 'root123', 'font');
$query = 'SELECT * FROM pens ORDER by id ASC';
$result = mysqli_query($connect, $query);

if($result):
    if(mysqli_num_rows($result)>0):
        session_start();
        if (isset($_POST['ctext'])) {
            $_SESSION['ctext'][$_POST['id']] = $_POST['ctext'];
        }
        while( $pen = mysqli_fetch_assoc($result) ):
        ?>
        <form method="post" action="<?php echo $_SERVER['PHP_SELF'];?>?action=add&id=<?php echo $pen['id']; ?>">

            <div class="name pen-<?php echo $pen['id']; ?>">
                <input type="text" name="ctext" class="form-control" placeholder="Type your text here" value="<?php $ctext = ''; if(isset($_SESSION['ctext'][$pen['id']])){ $ctext = $_SESSION['ctext'][$pen['id']]; } echo htmlspecialchars($ctext); ?>"></input>
                <input type="hidden" name="id" value="<?php echo $pen['id']?>"></input>
            </div>

            <div class="btn-custom">
                <input type="submit" name="add_to_cart" class="btn btn-block" value="Accept"></input>
            </div>      
        </form>
        <?php
        endwhile;
    endif;
endif;

Note: I removed the now unnecessary counter $i. The session handling is mainly done before the while loop (start a session and store POST data). During output the values from the session are used. The name of the input is not an array anymore.

注意：我删除了现在不必要的计数器$ i。会话处理主要在while循环之前完成（启动会话并存储POST数据）。在输出期间，使用会话中的值。输入的名称不再是数组。

#2

Change name of an input to an array.like this . When you submit the form you will get these values as an array. Give it a try

将输入的名称更改为数组。就像这样。提交表单时，您将获得这些值作为数组。试一试

<input type="text" name="ctext[]" class="form-control" placeholder="Type your text here"></input>

#3

I guess your code is misleading you, your form is in while loop so once any of the ctext input is filled your variable $_POST['ctext'] is set on server side and according to your code it sets all the value of ctext once accept is pressed.

我猜您的代码会误导您，您的表单处于while循环中，因此一旦填充了任何ctext输入，您的变量$ _POST ['ctext']就会在服务器端设置，并根据您的代码设置ctext的所有值接受按下。

You can have different names as a solution or an array indexing in input field name=“ctext[]” to avoid this.

您可以在输入字段名称=“ctext []”中将不同的名称作为解决方案或数组索引来避免这种情况。

#1