How can a PHP developer display standard or non-standard comments in a database based on user input from a form?

To display standard or non-standard comments in a database based on user input from a form, the PHP developer can use SQL queries to retrieve the comments from the database based on the user input. The user input can be sanitized to prevent SQL injection attacks. The retrieved comments can then be displayed on the webpage accordingly. 

<?php
// Assuming the user input is stored in a variable called $user_input
$user_input = $_POST['user_input'];

// Sanitize the user input to prevent SQL injection
$sanitized_input = mysqli_real_escape_string($connection, $user_input);

// Query the database to retrieve comments based on user input
$query = "SELECT * FROM comments WHERE comment_type = '$sanitized_input'";
$result = mysqli_query($connection, $query);

// Display the comments on the webpage
while($row = mysqli_fetch_assoc($result)) {
    echo $row['comment_text'] . "<br>";
}
?>

Keywords

PHP database user input form comments

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