What are the key attributes to correctly include in an HTML form for successful data transfer to PHP scripts?

To successfully transfer data from an HTML form to PHP scripts, it is important to include the following key attributes in the form: 1. The "method" attribute should be set to "post" or "get" to specify how the form data will be sent. 2. The "action" attribute should specify the URL of the PHP script that will process the form data. 3. Each form input element should have a "name" attribute to identify the data when it is sent to the PHP script. 

<form method="post" action="process_form.php">
    <input type="text" name="username">
    <input type="password" name="password">
    <button type="submit">Submit</button>
</form>

Keywords

HTML form data transfer PHP scripts attributes validation

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