メソッドの呼び出し回数を数えるサンプル

call_count.php

<?php

class CallCount
{
    public $call_counts = array();

    function counts($method) {
        if(!isset($this->call_counts[$method])) {
            $this->call_counts[$method] = 0;
        }
        $this->call_counts[$method]++;
    }

}

class World
{
    function __construct()
    {
        $this->callCount = new CallCount();
    }

    function hello()
    {
        echo 'hello';
        $this->callCount->counts(__FUNCTION__);
    }
}

$world = new World();
$world->hello();
$world->hello();
$world->hello();
var_dump($world->callCount->call_counts);