This PHP code will increment and display a View Count everytime
a user views the web page that contains this counter

<?php

$filename = 'xxviewcount.txt';

// 1. Check if the file exists. If not, initialize it with 0.
if (!file_exists($filename)) {
file_put_contents($filename, '0');
}

// 2. Open the file for reading and writing
$file = fopen($filename, 'c+');

if ($file) {
// Acquire an exclusive lock (prevents data corruption from simultaneous hits)
if (flock($file, LOCK_EX)) {

// 3. Read the current count (forcing it to an integer for safety)
$current_count = (int)trim(fread($file, filesize($filename) ? filesize($filename) : 1));

// 4. Display the current count to the user
echo "This page has been viewed " . $current_count . " times.";

// 5. Increment the count
$new_count = $current_count + 1;

// 6. Rewind the file pointer to the beginning and truncate the file
ftruncate($file, 0);
rewind($file);

// 7. Save the new count
fwrite($file, $new_count);

// Flush output before releasing the lock
fflush($file);

// 8. Release the lock
flock($file, LOCK_UN);
} else {
echo "Error: Could not lock the file for writing.";
}

// Close the file connection
fclose($file);
} else {
echo "Error: Could not open the counter file.";
}

?>

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