What are some best practices for ensuring equal frequency of banner ad displays in PHP scripts?

One way to ensure equal frequency of banner ad displays in PHP scripts is to use a session variable to keep track of the number of times each banner ad has been displayed. By incrementing this variable each time a banner ad is displayed and rotating through the ads based on the count, you can evenly distribute the display frequency. 

<?php
session_start();

// Define an array of banner ad URLs
$bannerAds = array(
    'banner1.jpg',
    'banner2.jpg',
    'banner3.jpg'
);

// Check if session variable exists, if not, initialize it
if(!isset($_SESSION['adCount'])) {
    $_SESSION['adCount'] = 0;
}

// Display the banner ad based on the count
$adIndex = $_SESSION['adCount'] % count($bannerAds);
echo '<img src="' . $bannerAds[$adIndex] . '" alt="Banner Ad">';

// Increment the ad count
$_SESSION['adCount']++;

?>

Keywords

PHP banner ad frequency display scripts

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