在提交时获取复选框值 [英] Getting checkbox values on submit

问题描述

我有 6 个选项，我想获取选中的值以将它们存储在第二页的变量中.我该如何继续这样做?

<!-- 选择-->红色 绿色 蓝色 青色 洋红色 黄色 黑色 <!-- 提交--><输入类型=提交"值=提交"></表单>

和 third.php 页面:

$color = $_GET['color'];echo '颜色是'.$color;

如果我删除 []，我会得到颜色，当我像 color[] 那样做时，我收到一条通知:

<块引用>

数组到字符串的转换

我想要的是选中的复选框的值，以便我可以将其存储在变量中.

解决方案

一个很好的方法，它是我最喜欢的，我相信对很多人来说，是利用 foreach 它将输出您选择的每种颜色，并显示在屏幕上一个下方.

在使用复选框时，您别无选择，只能使用 foreach，这就是为什么您只能从数组中返回一个值.

这是一个使用 $_GET 的例子.但是，您可以使用 $_POST 并且需要使两个文件中的两个指令都匹配才能正常工作.

###HTML 表单

红色<输入类型=复选框"名称=颜色[]"；值=红色">绿色<输入类型=复选框"名称=颜色[]"；值=绿色">蓝色<输入类型=复选框"名称=颜色[]"；值=蓝色">青色<输入类型=复选框"名称=颜色[]"；值＝青色">洋红色<输入类型=复选框"名称=颜色[]"；值=洋红色">黄色<输入类型=复选框"名称=颜色[]"；值=黄色">黑色<输入类型=复选框"名称=颜色[]"；值=黑色"><输入类型=提交"值=提交"></表单>

###PHP(使用 $_GET)使用 third.php 作为处理程序

假设选择了红色、绿色、蓝色和青色作为颜色，将显示如下:

<块引用>

红色
绿色
蓝色
青色

---

##OPTION #2

您还可以检查是否选择了颜色.如果没有选择，则会出现一条单独的消息.

---

##附加选项:以列表形式出现:(

可以替换为

)

I have 6 options, I want to get the checked values to store them in variable on second page. How do I go on doing that?

<form action="third.php" method="get">
    <!-- Choices -->
    Red     <input type="checkbox" name="color[]" id="color" value="Red">
    Green   <input type="checkbox" name="color[]" id="color" value="Green">
    Blue    <input type="checkbox" name="color[]" id="color" value="Blue">
    Cyan    <input type="checkbox" name="color[]" id="color" value="Cyan">
    Magenta <input type="checkbox" name="color[]" id="color" value="Magenta">
    Yellow  <input type="checkbox" name="color[]" id="color" value="Yellow">
    Black   <input type="checkbox" name="color[]" id="color" value="Black">
    <!-- Submit -->
    <input type="submit" value="submit">
</form>

And third.php page :

$color = $_GET['color'];

echo 'The color is '.$color;

If I remove [], I get the color is on, when I do it like color[] I get a notice saying :

Array to string conversion

What I want is the value of checked, checkboxes so I can store it in variable.

解决方案

A good method which is a favorite of mine and for many I'm sure, is to make use of foreach which will output each color you chose, and appear on screen one underneath each other.

When it comes to using checkboxes, you kind of do not have a choice but to use foreach, and that's why you only get one value returned from your array.

Here is an example using $_GET. You can however use $_POST and would need to make both directives match in both files in order to work properly.

###HTML FORM

<form action="third.php" method="get">
    Red<input type="checkbox" name="color[]" value="red">
    Green<input type="checkbox" name="color[]" value="green">
    Blue<input type="checkbox" name="color[]" value="blue">
    Cyan<input type="checkbox" name="color[]" value="cyan">
    Magenta<input type="checkbox" name="color[]" value="Magenta">
    Yellow<input type="checkbox" name="color[]" value="yellow">
    Black<input type="checkbox" name="color[]" value="black">
    <input type="submit" value="submit">
</form>

###PHP (using $_GET) using third.php as your handler

<?php

$name = $_GET['color'];

// optional
// echo "You chose the following color(s): <br>";

foreach ($name as $color){ 
    echo $color."<br />";
}

?>

Assuming having chosen red, green, blue and cyan as colors, will appear like this:

red
green
blue
cyan

---

##OPTION #2

You can also check if a color was chosen. If none are chosen, then a seperate message will appear.

<?php

$name = $_GET['color'];

if (isset($_GET['color'])) {
    echo "You chose the following color(s): <br>";

    foreach ($name as $color){
        echo $color."<br />";
    }
} else {
    echo "You did not choose a color.";
}

?>

---

##Additional options: To appear as a list: (<ul></ul> can be replaced by <ol></ol>)

<?php

$name = $_GET['color'];

if (isset($_GET['color'])) {
    echo "You chose the following color(s): <br>";
    echo "<ul>";
    foreach ($name as $color){
        echo "<li>" .$color."</li>";
    }
    echo "</ul>";
} else {
    echo "You did not choose a color.";
}

?>

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