Question

在PHP中，我想检查是否选中了单选按钮;我用isset做这个，但有些东西不起作用。

HTML：

 <form action="test.php" method="post" name="form_contribute" id="form_contribute">
            <fieldset>
                <legend>Required information</legend> 
                <p>Type of publication</p>
                <div id="radio_buttons">
                    <label for="p_book">Book</label>
                    <input type="radio" name="p_radio" id="p_book" value="p_book">

                    <label for="p_article">Article</label>
                    <input type="radio" name="p_radio" id="p_article" value="p_article">

                    <label for="journal">Journal</label>
                    <input type="radio" name="p_radio" id="p_journal" value="p_journal">


                </div>

                <div id="contribute">

                    Title <input type="text" name="quote_title" id="quote_title">
                    Author(s)* <input type="text" name="author" id="author">
                    Title <input type="text" name="title" id="title">
                    ISBN <input type="text" name="isbn" id="isbn">
                    Publisher <input type="text" name="publisher" id="publisher">
                    Source <input type="text" name="source" id="source">
                    Addendum <textarea id="addendum"></textarea>
                    <div id="instructions">
                        <ul>
                            <li>Add only published non-fiction works; </li>
                            <li>Fill in all the required fields (designated by an asterix at the end);</li>
                            <li>Write the ISBN without space or special characters; if no ISBN, use identifier code as replacement;</li>
                            <li>Title should be written in English; exceptions are made for works unpublished in English;</li>
                            <li>Publisher should be the publisher of where your source derives from, not the original publisher of the work;</li>
                            <li>Source is to be used for verification; add chapter, section, page;</li>
                            <li>Use addendum to add other relevant info (e.g. if you've translated the material yourself; if the author is anonymous;) </li>
                        </ul>
                    </div> <!-- end #instructions -->
                </div>

            </fieldset>
            <div class="big_button">
                <input type="submit" name="edify_button" id="edify_button" value="Edify">
            </div>
        </form>

在php中：

的error_reporting（E_ALL）; ini_set（'display_errors'，'On'）;

    if (isset($_POST['edify_button']) && isset($_POST['p_radio'])) {

        $radio_values = $_POST['p_radio'];
        if ($radio_values) {
            echo 'checked';
        }else  {
            echo 'unchecked';
    }
}

我也试过!empty($_POST['my_radio']。我没有任何错误，只是一个空白页面。在if语句中，在不同的测试中，我添加了if $radio_values == null，然后添加了一些内容，但这也无济于事。在php中，是否有一个我不知道的值？

Answer 1

使用双嵌套方法，例如：

<?php

error_reporting(E_ALL);
ini_set('display_errors', 'On');

if (isset($_POST['edify_button'])){

    if(isset($_POST['p_radio'])) {

        $radio_values = $_POST['p_radio'];
            echo 'checked';
        }else  {
            echo 'unchecked';
    }
}

?>

它会让你的问题消失，然后工作; - ）

Answer 2

if (isset($_POST['my_button']) && isset($_POST['my_radio'])) {

        $radio_values = $_POST['my_radio'];
        if ($radio_values) {
            echo 'not null';
        }else {
            echo 'null';
    }}

如果未选择任何收音机，您将获得空白页面，因为您正在同时验证isset($_POST['my_button']) && isset($_POST['my_radio'])，只有在选中任何单选按钮时，isset($_POST['my_radio']才会返回true。

检查是否设置了单选按钮

2 个答案: