How can PHP be used to check if a form has been submitted and display data accordingly, even when the page is initially loaded?

To check if a form has been submitted in PHP and display data accordingly, you can use the `$_SERVER['REQUEST_METHOD']` variable to determine if the form has been submitted using the POST method. You can then use an `if` statement to check if the form has been submitted and display the form data. 

<?php
if($_SERVER['REQUEST_METHOD'] == 'POST'){
    // Form has been submitted
    $name = $_POST['name'];
    $email = $_POST['email'];
    
    echo "Form submitted with data:<br>";
    echo "Name: $name<br>";
    echo "Email: $email";
} else {
    // Form has not been submitted, display form
    echo "<form method='post'>";
    echo "<input type='text' name='name' placeholder='Name'>";
    echo "<input type='email' name='email' placeholder='Email'>";
    echo "<input type='submit' value='Submit'>";
    echo "</form>";
}
?>

Keywords

PHP form submission isset() $_POST data display

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