How can caching affect the display of PHP arrays, and what steps can be taken to ensure accurate output?

Caching can affect the display of PHP arrays by storing outdated data and presenting it to users instead of the most recent information. To ensure accurate output, you can disable caching for PHP scripts or use cache-busting techniques to force the browser to fetch updated data.

// Disable caching for PHP scripts
header("Cache-Control: no-cache, must-revalidate");
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");

// Use cache-busting techniques
$timestamp = time();
echo "<img src='image.jpg?timestamp=$timestamp'>";