What are some best practices for designing a PHP-based learning program that allows users to input and view "Fachbegriffe" and their meanings?

Issue: To design a PHP-based learning program that allows users to input and view "Fachbegriffe" and their meanings, it is important to create a user-friendly interface for inputting and displaying the terms and their definitions. Additionally, the program should include functionality for users to search and filter terms, as well as edit or delete existing entries. 

<?php

// Connect to database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "learning_program";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Input form for adding new "Fachbegriffe"
echo '<form method="post" action="add_term.php">';
echo '<label for="term">Fachbegriff:</label>';
echo '<input type="text" name="term" required>';
echo '<label for="definition">Definition:</label>';
echo '<textarea name="definition" required></textarea>';
echo '<button type="submit">Add Term</button>';
echo '</form>';

// Display existing "Fachbegriffe" and their meanings
$sql = "SELECT term, definition FROM fachbegriffe";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo '<h3>' . $row["term"] . '</h3>';
        echo '<p>' . $row["definition"] . '</p>';
    }
} else {
    echo "No terms found.";
}

$conn->close();

?>

Keywords

PHP database design user input validation CRUD operations security measures

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