source: tags/2.1.5/lib/ScriptTimer.inc.php

<?php
/**
 * The Strangecode Codebase - a general application development framework for PHP
 * For details visit the project site: <http://trac.strangecode.com/codebase/>
 * Copyright 2001-2010 Strangecode, LLC
 * 
 * This file is part of The Strangecode Codebase.
 *
 * The Strangecode Codebase is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your option)
 * any later version.
 * 
 * The Strangecode Codebase is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * The Strangecode Codebase. If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * ScriptTimer.inc.php
 */
class ScriptTimer {

    var $time_format = '%.3f';
    var $_timing_start_times = array();
    var $_timing_stop_times = array();
    var $_timing_cumulative_times = array();
    
    function start($name='default')
    {
        $this->_timing_start_times[$name] = explode(' ', microtime());
    }
    
    function stop($name='default')
    {
        if (!isset($this->_timing_stop_times[$name]) || !isset($this->_timing_cumulative_times[$name])) {
            $this->_timing_stop_times[$name] = null;
            $this->_timing_cumulative_times[$name] = null;
        }
        $this->_timing_stop_times[$name] = explode(' ', microtime());
        $this->_timing_cumulative_times[$name] += $this->getTime($name);
    }
    
    function getTime($name='default')
    {
        if (!isset($this->_timing_start_times[$name])) {
            return 0;
        }
        if (!isset($this->_timing_stop_times[$name])) {
            $stop_time = explode(' ', microtime());
        } else {
            $stop_time = $this->_timing_stop_times[$name];
        }
        // Do the big numbers first so the small ones aren't lost.
        $current = $stop_time[1] - $this->_timing_start_times[$name][1];
        $current += $stop_time[0] - $this->_timing_start_times[$name][0];
        return $current;
    }
    
    function printAll($sort_by_time=false)
    {
        $names = array_map('strlen', array_keys($this->_timing_start_times));
        sort($names);
        $name_len = end($names);
        
        if ($sort_by_time) {
           arsort($this->_timing_cumulative_times, SORT_NUMERIC);
        }
        
        $this->_timing_cumulative_times['TOTAL'] = array_sum($this->_timing_cumulative_times);

        echo '<pre>';
        foreach ($this->_timing_cumulative_times as $name => $time) {
            printf("\n%-{$name_len}s $this->time_format", $name, $time);
        }
        echo '</pre>';
    }
}

?>