Metrics is a container for keeping track of counters or any value for that matter and for tracking time. A common application would be to use it for a process that takes a few seconds for which various information should be collected and then logged.

The collected data can be emitted as an array or as a JSON string.

Installation

Using Composer:

{
    "require": {
        "hgg/metrics": "*"
    }
}

Usage

Simple use case

<?php
$metrics = new Metrics(true);
$metrics->myCounter = 0;

while (1) {
    // Do some work
    ++$metrics->myCounter;
}

print_r($metrics->toArray());

The above constructs a Metrics object with time tracking turned on and a single counter that is incremented as a result of some process. The metrics container is then emitted as an array.

Initialize multiple counters more efficiently

<?php
$metrics = new Metrics(true);
$metrics->initMembers(array('counter1', 'counter2', 'counter3'), 0);

This initializes the named counters to 0 with a single call.

Output to Array

<?php
$arrayResult = $metrics->toArray();

Output to JSON

<?php
$json = $metrics->toJson();

Sample output (JSON)

{
  "counter1": 23,
  "counter2": 569,
  "counter3": 0,
  "elapsed-time": "00:00:24"
}

Note

For a more comprehensive solution take a look at beberlei/metrics.