What is the best practice for displaying default values in a PHP form before submission?

When displaying default values in a PHP form before submission, it is important to check if the form has been submitted. If it hasn't, then display the default values. This can be achieved by using the ternary operator to check if the form has been submitted, and if not, display the default values. 

<?php
// Define default values
$default_name = "John Doe";
$default_email = "john.doe@example.com";

// Check if form has been submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Form has been submitted, use submitted values
    $name = $_POST["name"];
    $email = $_POST["email"];
} else {
    // Form has not been submitted, use default values
    $name = $default_name;
    $email = $default_email;
}
?>

<form method="post" action="">
    <label for="name">Name:</label>
    <input type="text" name="name" value="<?php echo $name; ?>"><br><br>
    
    <label for="email">Email:</label>
    <input type="email" name="email" value="<?php echo $email; ?>"><br><br>
    
    <input type="submit" value="Submit">
</form>

Keywords

PHP form default values submission display

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