Full-stack PHP monitoring

You can monitor PHP on your Windows (IIS/Apache) environments—full-stack monitoring is now available on Windows for Apache mod_php applications and PHP CGI.

Enabling PHP monitoring

To enable PHP monitoring in Dynatrace

1. In the Dynatrace menu, go to Settings and select Monitoring > Monitored technologies.
2. On the Supported technologies tab, find PHP and open it for editing.
3. Enable the settings you need for your monitoring:
   • Monitor PHP on every host
     This switch enables PHP monitoring on all hosts. To monitor a subset of your hosts, turn this switch off and then enable PHP monitoring on selected hosts.
   • Enable FastCGI PHP processes launched by Apache HTTP Server on every host
     This setting is permanently enabled starting with OneAgent version 1.191.
   • Enable PHP x monitoring on every host
     If an Early Adopter release is available, this switch is where you can choose to try it.

     Important: Verify that your monitoring environment meets the requirements stated under the switch.

Running PHP on a web server

The most common ways to run PHP on a web server are:

• mod_PHP—The default on vanilla Apache HTTP servers. PHP is run as an Apache module, meaning that a PHP request is run under the Apache process. This makes PHP perform well, but flexibility is limited by the Apache configuration, permissions, restrictions, etc.
• PHP_FPM—FastCGI Process Manager (FPM) uses pool management to optimize performance. Every pool acts as a standalone PHP instance, enabling you to create an independent configuration per pool, which provides granular control and greater flexibility. This is the fastest-performing method to run PHP.

Monitoring PHP-CLI

Early Adopter

PHP-CLI monitoring enables deep monitoring for your PHP-CLI applications. This provides you with database visibility, threading support, outgoing calls monitoring, and more, so you can:

• Analyze the performance of your PHP-CLI application
• Easily locate bottlenecks in your code
• See why communication with the database takes as long as it does
• Find out whether the application manages memory properly

Full code-level visibility into your PHP-CLI application

With PHP-CLI monitoring, you get:

• Thread-safe and non-thread-safe driven PHP-CLI support for all Dynatrace-supported PHP versions
• All existing OneAgent PHP features and CLI-only features:
  • pthreads support for PHP-CLI thread-safe
  • Method hotspots using ambient sampling
  • Request attributes support
  • Deep monitoring (after enabling custom service detection)

Requirements for PHP-CLI monitoring

• OneAgent version 1.181+ installed on all monitored hosts
• PHP NG monitoring enabled
  To check or change this setting
  1. Go to Settings and select Monitoring > Monitored technologies.
  2. Find PHP and open it for editing.

Limitations of PHP-CLI monitoring

• Injection of OneAgent causes slight overhead on process startup. It should not be enabled for short-living processes.
• Forking inside a php-cli process is not supported. In this scenario, agent becomes inactive.
• Instrumentation of php-cli processes with code specified as a command-line argument is not supported.
• Instrumentation of pthreads is supported from PHP 7.2 to PHP 7.3. Earlier PHP releases are not fully thread-safe and should not be used with pthreads.

Getting started with PHP-CLI monitoring

To enable deep monitoring of your PHP-CLI applications

1. In the Dynatrace menu, go to Settings and select Processes and containers > Custom process monitoring rules.

2. Select Add custom rule to start defining a process monitoring rule for PHP-CLI.
   You can build a rule based on conditions such as:

   • EXE name
   • EXE path
   • PHP script
   • PHP working directory

   To learn more about process monitoring rules, see:

   • blog post Automated and fine-grained control of monitoring at scale
   • Set up process group monitoring

3. Select Save changes. Your rule is listed on the Custom process monitoring rules page.

4. Add more rules as needed.

5. Restart your PHP application.

Making PHP-CLI monitoring work for you