How can PHP be used to implement a visitor counter with IP blocking functionality for a website?

To implement a visitor counter with IP blocking functionality in PHP, you can store the visitor count in a file or database and check the visitor's IP address against a blacklist before incrementing the count. If the IP address is on the blacklist, you can block the visitor from accessing the website. 

// Check if the visitor's IP address is in the blacklist
$blacklist = ['127.0.0.1', '192.168.0.1']; // Example blacklist
$visitor_ip = $_SERVER['REMOTE_ADDR'];

if (in_array($visitor_ip, $blacklist)) {
    die("Your IP address is blocked.");
}

// Increment the visitor count
$counter_file = 'visitor_count.txt';
$counter = (file_exists($counter_file)) ? file_get_contents($counter_file) : 0;
$counter++;
file_put_contents($counter_file, $counter);

echo "You are visitor number: " . $counter;

Keywords

PHP visitor counter IP blocking website implementation

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