以下是几个可能的标题： * How to Create a Self-Submitting PHP Form? * How to Make a PHP Form Submit to Itself? * How to Create a PHP Form That Posts Back to Itself? * How to Create a PHP Form That Submits Data t

How to create a PHP form that submits to itself?

Question:

How to create a self-posting/self-submitting form, i.e. one that submits the results to itself rather than to another form ?

Answer:

The correct approach is to use $_SERVER["PHP_SELF"] (in combination with htmlspecialchars to avoid possible exploits). You can also skip the action= part if it's empty, which is invalid in the W3C but currently works in most (all?) browsers - by default, if it's empty, commit to itself.

Here is an example form that gets a name and email and then displays the value you entered after submission:

<code class="php"><?php if (!empty($_POST)): ?>
    Welcome, <?php echo htmlspecialchars($_POST["name"]); ?>!<br>
    Your email is <?php echo htmlspecialchars($_POST["email"]); ?>.<br>
<?php else: ?>
    <form action="<?php%20echo%20htmlspecialchars(%24_SERVER%5B" php_self>" method="post">
        Name: <input type="text" name="name"><br>
        Email: <input type="text" name="email"><br>
        <input type="submit">
    </form>
<?php endif; ?></code>

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