Verify and check PHP Opcache jit is working

check-jit.php

<?php
// Force JIT to engage with a computationally intensive loop
function test_jit() {
    $start = microtime(true);
    $sum = 0;
    for ($i = 0; $i < 10000000; $i++) {
        $sum += $i * 0.01;
    }
    $end = microtime(true);
    return [
        'sum' => $sum,
        'time' => ($end - $start),
        'jit_status' => function_exists('opcache_get_status') ? opcache_get_status(false)['jit'] : 'N/A'
    ];
}

// Run the test
$result = test_jit();

// Output results
header('Content-Type: text/plain');
echo "JIT Test Results\n";
echo "---------------\n";
echo "Sum: " . $result['sum'] . "\n";
echo "Time: " . number_format($result['time'], 4) . " seconds\n\n";

if (is_array($result['jit_status'])) {
    echo "JIT Status:\n";
    echo "Buffer Size: " . ($result['jit_status']['buffer_size'] / 1024 / 1024) . "MB\n";
    echo "Buffer Used: " . ($result['jit_status']['buffer_used'] / 1024 / 1024) . "MB\n";
}