How can a PHP developer prevent repetitive database entries on a specific page visit using session variables?

To prevent repetitive database entries on a specific page visit using session variables, the PHP developer can set a session variable to track whether the entry has already been made during the current session. By checking this session variable before inserting data into the database, the developer can avoid duplicate entries. 

<?php
session_start();

if (!isset($_SESSION['entry_made'])) {
    // Insert data into the database
    $_SESSION['entry_made'] = true;
}
?>

Keywords

PHP session variables database entries prevent repetitive

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