<?php

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if( !defined( 'ABSPATH') ) exit();

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class RevSliderMemoryUsageInformation

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{

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private $real_usage;

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private $statistics = array();

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// Memory Usage Information constructor

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public function __construct($real_usage = false)

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{

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$this->real_usage = $real_usage;

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}

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// Returns current memory usage with or without styling

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public function getCurrentMemoryUsage($with_style = true)

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{

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$mem = memory_get_usage($this->real_usage);

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return ($with_style) ? $this->byteFormat($mem) : $mem;

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}

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// Returns peak of memory usage

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public function getPeakMemoryUsage($with_style = true)

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{

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$mem = memory_get_peak_usage($this->real_usage);

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return ($with_style) ? $this->byteFormat($mem) : $mem;

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}

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// Set memory usage with info

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public function setMemoryUsage($info = '')

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{

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$this->statistics[] = array(

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'time' => time(), //microtime(),

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'info' => $info,

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'memory_usage' => $this->getCurrentMemoryUsage());

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}

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// Print all memory usage info and memory limit and

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public function printMemoryUsageInformation()

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{

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//return true;

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echo '<pre>';

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foreach ($this->statistics as $satistic)

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{

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echo "Time: " . $satistic['time'] .

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" | Memory Usage: " . $satistic['memory_usage'] .

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" | Info: " . $satistic['info'];

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echo "\n";

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}

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echo "\n\n";

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echo "Peak of memory usage: " . $this->getPeakMemoryUsage();

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echo "\n\n";

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echo '</pre>';

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}

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// Set start with default info or some custom info

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public function setStart($info = 'Initial Memory Usage')

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{

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$this->setMemoryUsage($info);

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}

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// Set end with default info or some custom info

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public function setEnd($info = 'Memory Usage at the End')

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{

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$this->setMemoryUsage($info);

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}

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// Byte formatting

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private function byteFormat($bytes, $unit = "", $decimals = 2)

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{

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$units = array('B' => 0, 'KB' => 1, 'MB' => 2, 'GB' => 3, 'TB' => 4,

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'PB' => 5, 'EB' => 6, 'ZB' => 7, 'YB' => 8);

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$value = 0;

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if ($bytes > 0)

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{

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// Generate automatic prefix by bytes

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// If wrong prefix given

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if (!array_key_exists($unit, $units))

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{

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$pow = floor(log($bytes) / log(1024));

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$unit = array_search($pow, $units);

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}

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// Calculate byte value by prefix

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$value = ($bytes / pow(1024, floor($units[$unit])));

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}

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// If decimals is not numeric or decimals is less than 0

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// then set default value

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if (!is_numeric($decimals) || $decimals < 0)

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{

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$decimals = 2;

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}

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// Format output

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return sprintf('%.' . $decimals . 'f ' . $unit, $value);

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}

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}

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