单击提交时验证文本区域 [英] Validate textarea when clicking submit

问题描述

我正在开发允许用户向系统发送反馈的网站.我已经通过使用textarea和按钮提交创建了反馈表.最重要的是，当用户单击提交"时，如果用户输入了一些我不希望他们输入的词，则该反馈将不会发送到系统；它将提醒用户在取消提交之前放弃该单词.

I am developing website that allow user sending feedback to system. I have created feedback form by using textarea and button for submit. In most important thing is when user click on submit, if user input some words that I don't want them to input, that feedback won't send to the system; it will alert user to drop out that word before cicking submit.

从现在开始，我只创建了一个简单的代码，如果用户输入了我不希望他们以反馈形式输入的字词，则会回显一些警告.

Since now, i just create a simple code that will echo some warning if user input the word that i don't want them to input in feedback form.

这是我的代码

Here is my code

<form action="main.php" method="post">
    <textarea cols='10' rows='5' name='text'></textarea>
    <br/>
    <input type='submit' name='add' Value='Add to list' />
</form>

<?php
if (isset($_POST['add'])) {
    $banned = array('dog', 'cat', 'cow'); // Add more
    $entry = $_POST['add'];
    foreach($banned as $word): if (strpos($entry, $word) !== false) die('Contains banned word');
    endforeach;
}
?> 

这是行不通的.谁能帮我解决这个问题?

It is not work. Can anyone help me to solve this problem?

谢谢.

推荐答案

尝试一下

$entry = $_POST['text'];    // Not $_POST['add'];
foreach ($banned as $word):
    if (strpos($entry, $word) !== false) {
        echo 'Contains banned word';
        exit;
    }
endforeach;

您的$entry将是文本框值，即 $ _ POST ['text'] not $ _POST ['add']

Your $entry will be the text box value i.e. $_POST['text'] not $_POST['add']

这篇关于单击提交时验证文本区域的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！