(isset $_POST['submit']) 条件始终为假

Question

我在名为 addSection.php 的页面中编写了以下代码

<from class="mainSettingsForm add" action="" method="post">
    <h1>Add new section</h1>
    <p>
        <label>new section</label>
        <input type="text" name="section_name" placeholder="section title">
        <label>section status</label>
        <select name="sectionStatus">
            <option value="active">active</option>
            <option value="disActive">disActive</option>
        </select>
    </p>
    <p>
        <label>section location</label>
        <select name="sectionLocation">
            <option value="Side">Side</option>
            <option value="Body">Body</option>
        </select>
    </p>
    <label>section description</label>
    <textarea name="sectionDesc" placeholder="Section description"></textarea>
    <input class="btn-primary" type="submit" name="submit" value="Add">


</from>

和以下代码在一个名为：Sections.php的页面中

<h2><a href="?page=sections&action=add">Add new section</a></h2>
<?php

if ($_POST OR @$_GET['action'])
{
    if (isset($_GET['action']) AND $_GET['action']=="add")
    {
        include 'views/addSection.php';
        if (isset($_POST['submit'])&&$_POST['submit']=="Add")
            echo 'ok';

    }

}
else
{
   include 'views/sections.php';
}

?>

此声明 if (isset($_POST['submit'])&&$_POST['submit']=="Add") 回声“好”； 永远不会被执行，因为它总是给出假值，如何让 isset($POST['submit']) 语句给出真值来执行条件？

Answer 1

请试试我的代码。这将帮助您了解您正在传递什么。我还修复了表单标签 - 正如@Hobo Sapiens 所建议的那样。

<?php print_r($_REQUEST);?>
<form class="mainSettingsForm add" action="" method="post">
    <h1>Add new section</h1>
    <p>
        <label>new section</label>
        <input type="text" name="section_name" placeholder="section title">
        <label>section status</label>
        <select name="sectionStatus">
            <option value="active">active</option>
            <option value="disActive">disActive</option>
        </select>
    </p>
    <p>
        <label>section location</label>
        <select name="sectionLocation">
            <option value="Side">Side</option>
            <option value="Body">Body</option>
        </select>
    </p>
    <label>section description</label>
    <textarea name="sectionDesc" placeholder="Section description"></textarea>
    <input class="btn-primary" type="submit" name="submit" value="Add">


</form>

Answer 2

您的陈述永远不会是真的，因为第二个 IF 陈述仅适用于 $_GET 变量，然后您尝试访问其中的 $_POST。您不能同时拥有 GET 和 POST。

您还有一些拼写错误 - $_GET['action'] 将是“添加”而不是“添加”，并且您的 HTML 中有 <from> 而不是 <form>。

if ( isset( $_POST['submit'] ) && $_POST['submit'] == "Add" ){
    echo "this is a POST and submit is add";
} elseif ( isset( $_GET['action']) && $_GET['action'] == "Add" ){
    echo "this is a GET and submit is add";
} else {
    include 'views/sections.php';
}