How Can I Send the Value of a Submit Button on Form Post in PHP?-PHP Tutorial-php.cn

How Can I Send the Value of a Submit Button on Form Post in PHP?

Susan Sarandon

Release： 2024-11-13 08:53:02

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How Can I Send the Value of a Submit Button on Form Post in PHP?

Sending Submit Button Values on Form Post

In this scenario, you aim to send the value of the submit button when a form is posted. However, you're unable to retrieve the submit button value in the PHP script ('buy.php').

The Problem:

The issue lies in the button names. In your code, the button names are not set to 'submit.' Consequently, the PHP variable $_POST['submit'] remains unset, resulting in isset($_POST['submit']) evaluating to false.

The Solution:

To rectify this, you need to ensure that the button names are explicitly set to 'submit.' Additionally, you can add a hidden input field to the form to specify the action being performed. Here's the revised code:

Sending Page:

<html>
<form action="buy.php" method="post">
    <input type="hidden" name="action" value="submit">
    <select name="name">
        <option>John</option>
        <option>Henry</option>
    </select>
    <input>

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Receiving Page: buy.php

<?php
if (isset($_POST['action'])) {
    echo '<br />The ' . $_POST['submit'] . ' submit button was pressed<br />';
}
?>

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By implementing these changes, you can effectively send the submit button's value when the form is posted and access it in the PHP script as $_POST['submit'].

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