README

agent-apm-php

Description: Agent APM for PHP

Prerequisites

• To monitor APM data on dashboard, Middleware Host-agent needs to be installed, You can refer this demo project to refer use cases of APM.
• PHP requires at least PHP 8+ and OpenTelemetry PHP-Extension to run this agent.

Guides

To use this APM agent, follow below steps:

1. Run composer require middleware/agent-apm-php in your project directory.
2. After successful installation, you need to add require 'vendor/autoload.php'; in your file.
3. Then after, you need to add use Middleware\AgentApmPhp\MwTracker; line.
4. Now, add following code to the next line with your Project & Service name:

   $tracker = new MwTracker('<PROJECT-NAME>', '<SERVICE-NAME>');
   

5. Then we have 2 functions, named preTrack() & postTrack(), your code must be placed between these functions. After preTrack() calls, you need to register your desired classes & functions as follows:

   $tracker->preTrack();
   $tracker->registerHook('<CLASS-NAME-1>', '<FUNCTION-NAME-1>');
   $tracker->registerHook('<CLASS-NAME-2>', '<FUNCTION-NAME-2>');
   

6. You can add your own custom attributes as the third parameter, and checkout many other pre-defined attributes here.

   $tracker->registerHook('<CLASS-NAME-1>', '<FUNCTION-NAME-1>', [
       'custom.attr1' => 'value1',
       'custom.attr2' => 'value2',
   ]);
   

7. At the end, just call postTrack() function, which will send all the traces to the Middleware Host-agent.

   $tracker->postTrack();
   

8. If you want to enable Logging feature along with tracing in your project, then you can use below code snippet:

   $tracker->warn("this is warning log.");
   $tracker->error("this is error log.");
   $tracker->info("this is info log.");
   $tracker->debug("this is debug log.");
   

9. So, final code snippet will look like as:

   <?php
   require 'vendor/autoload.php';
   use Middleware\AgentApmPhp\MwTracker;
   
   $tracker = new MwTracker('<PROJECT-NAME>', '<SERVICE-NAME>');
   $tracker->preTrack();
   $tracker->registerHook('<CLASS-NAME-1>', '<FUNCTION-NAME-1>', [
       'custom.attr1' => 'value1',
       'custom.attr2' => 'value2',
   ]);
   $tracker->registerHook('<CLASS-NAME-2>', '<FUNCTION-NAME-2>');
   
   $tracker->info("this is info log.");
   
   // ----
   // Your code goes here.
   // ----
   
   $tracker->postTrack();
   

Note: OTEL collector endpoint for all the traces, will be http://localhost:9320/v1/traces by default.

Sample Code

<?php
require 'vendor/autoload.php';
use Middleware\AgentApmPhp\MwTracker;

$tracker = new MwTracker('DemoProject', 'PrintService');
$tracker->preTrack();
$tracker->registerHook('DemoClass', 'runCode', [
    'code.column' => '12',
    'net.host.name' => 'localhost',
    'db.name' => 'users',
    'custom.attr1' => 'value1',
]);
$tracker->registerHook('DoThings', 'printString');

$tracker->info("this is info log.");

class DoThings {
    public static function printString($str): void {
        // sleep(1);
        global $tracker;
        $tracker->warn("this is warning log, but from inner function.");
        
        echo $str . PHP_EOL;
    }
}

class DemoClass {
    public static function runCode(): void {
        DoThings::printString('Hello World!');
    }
}

DemoClass::runCode();

$tracker->postTrack();