Need to check your OpCache status? We intend to guide you through three proven methods, from quick command-line checks to detailed visual monitoring. This guide covers both server-wide and website-specific approaches.
Understanding Key Terms:
- OpCache: A PHP caching system that stores precompiled script bytecode in memory, significantly improving PHP performance.
- CLI: Command Line Interface, a text-based way to interact with your server.
- phpinfo(): A PHP function that displays comprehensive information about your PHP configuration.
Before proceeding with OpCache configuration:
- Test these steps in a non-production environment first
- Backup your current OpCache configuration
- Check OpCache's official documentation for the most up-to-date instructions
- Ensure you have selected the appropriate maintenance window
Quick Method Overview
- Method 1: Fast CLI checks - perfect for quick status verification
- Method 2: Detailed configuration review - ideal for debugging
- Method 3: Visual interface - best for ongoing monitoring
Method 1: Using PHP CLI Commands
Server-wide Check
# Check if OpCache is enabled in PHP configuration
php -i | grep opcache
# Alternative using php -m
php -m | grep -i opcache
# Check OpCache configuration file
php --ini | grep opcache
Website-specific Check
Create a file named opcache-check.php:
<?php
if (function_exists('opcache_get_status')) {
$status = opcache_get_status(false);
echo "OpCache Status:\n";
print_r($status);
} else {
echo "OpCache is not available\n";
}
Run it using:
php opcache-check.phpMethod 2: Using phpinfo()
Server Check
Create a file named check-opcache.php:
<?php
phpinfo(INFO_MODULES);
?>
Access via CLI:
php check-opcache.php | grep -i opcacheWebsite Check
Create a secure, password-protected file named opcache-info.php:
<?php
if (!isset($_SERVER['PHP_AUTH_USER']) || $_SERVER['PHP_AUTH_USER'] !== 'admin' || $_SERVER['PHP_AUTH_PW'] !== '$super_secure_password') {
header('WWW-Authenticate: Basic realm="OpCache Status"');
header('HTTP/1.0 401 Unauthorized');
exit('Unauthorized');
}
if (function_exists('opcache_get_configuration')) {
echo "<h2>OpCache Configuration</h2>";
print_r(opcache_get_configuration());
echo "<h2>OpCache Status</h2>";
print_r(opcache_get_status());
} else {
echo "OpCache is not available";
}
?>
Method 3: Using OpCache GUI Tools
For a more user-friendly approach, you can use opcache-gui, a clean and responsive interface that shows statistics, settings, and cached files in real-time.
Server-wide Installation
# Install via Composer
composer require amnuts/opcache-gui
# Or clone directly
git clone https://github.com/amnuts/opcache-gui.git /var/www/opcache-gui
Website Implementation
Create a secure file named opcache-status.php:
<?php
require_once 'vendor/autoload.php';
// Basic authentication
if (!isset($_SERVER['PHP_AUTH_USER']) || $_SERVER['PHP_AUTH_USER'] !== 'admin' || $_SERVER['PHP_AUTH_PW'] !== 'your_secure_password') {
header('WWW-Authenticate: Basic realm="OpCache Status"');
header('HTTP/1.0 401 Unauthorized');
exit('Unauthorized');
}
// Initialize OpCache GUI
$opcache = new Opcache\OpCacheGUI();
echo $opcache->getGUI();
?>
Security Best Practices
- Always protect OpCache status pages with strong authentication
- Store status files outside the web root when possible
- Implement IP restrictions for added security
Apache Configuration Example
# Apache configuration for secure access
<Files "opcache-*.php">
Require ip 127.0.0.1
# Or specific IPs
Require ip 192.168.1.0/24
</Files>
Troubleshooting Common Issues
If OpCache Appears Disabled
# Check PHP version
php -v
# Verify OpCache installation
php -m | grep -i opcache
# Check PHP configuration directory
php --ini
If OpCache Is Enabled But Not Working
# Check permissions
ls -l /etc/php/*/mods-available/opcache.ini
# Verify configuration loading
php --ini | grep -i loaded
For Memory Issues
# Check current memory usage
echo '<?php print_r(opcache_get_status());' | php
