Varnish Stats

VarnishHitRate.php

<?php

function getStats()
{
  exec('varnishstat -1', $output);
  return implode("\n", $output);
}

$rawStats = getStats();

$hitString = 'MAIN.cache_hit';
$hit = (int)substr($rawStats, strpos($rawStats, $hitString) + strlen($hitString), 25);

$missString = 'MAIN.cache_miss';
$miss = (int)substr($rawStats, strpos($rawStats, $missString) + strlen($missString), 25);

$ratio = round((($hit / ($hit + $miss)) * 100), 2);

file_put_contents(__DIR__ . "/history/latest.log", date('c') . ';' . $hit . ';' . $miss . ';' . $ratio);

echo $ratio;