[CheckMemoryConsumption проверка занимаемой памяти (basic implementation))

memory_consumption.php

    /**
     * [CheckMemoryConsumption проверка занимаемой памяти приложением]
     * @param string $state [состояние одно из возможных: initial,final,peak]
     * @return string
     */
    public static function CheckMemoryConsumption($state = 'initial')
    {
        $memorySizeConsumptionString = '';

        switch ($state){
            case "initial":
                $memorySizeConsumptionString = "Initial: ".number_format(memory_get_usage(), 0, ',', ' ')." bytes \n";
                /* prints
                Initial: 361400 bytes
                */
                break;

            case "final":
                $memorySizeConsumptionString = "Final: ".number_format(memory_get_usage(), 0, ',', ' ')." bytes \n";
                /* prints
                Final: 885912 bytes
                */
                break;

            case "peak":
                $memorySizeConsumptionString = "Peak: ".number_format(memory_get_peak_usage(), 0, ',', ' ')." bytes \n";
            /* prints
            Peak: 13687072 bytes
            */
            default:
                break;
        }
        return $memorySizeConsumptionString;
    }