What are the potential issues with using PHP for implementing a countdown feature in a browser game?

One potential issue with using PHP for implementing a countdown feature in a browser game is that PHP is a server-side language, meaning it cannot directly interact with the client-side browser. To solve this issue, you can use JavaScript to handle the countdown functionality on the client-side. 

// PHP code to send the initial countdown value to the client-side JavaScript
<?php
$initialCountdown = 60; // Initial countdown value in seconds

echo "<script>var countdown = $initialCountdown;</script>";
?>
```

```javascript
// Client-side JavaScript code to handle the countdown functionality
<script>
var countdownElement = document.getElementById('countdown');

function startCountdown() {
  setInterval(function() {
    countdownElement.innerHTML = countdown;
    countdown--;

    if (countdown < 0) {
      clearInterval();
      // Add code to handle countdown completion
    }
  }, 1000);
}

startCountdown();
</script>

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