I wanted to benchmark functional PHP vs loops...

benchmark.php

<?php

/*
  PHP Benchmark
  Downloaded from: http://onlinephpfunctions.com
 */

class benchmark
{

    function benchmark()
    {

        $totalTime = 0;
        $head = str_pad("#", 40, "#");
        echo "<pre>$head\n|" . str_pad("PHP BENCHMARK", 38, " ", STR_PAD_BOTH) . "|\n$head\nStart : " . date("m/d/Y H:i:s a") . "\nServer : {$_SERVER['SERVER_NAME']}@{$_SERVER['SERVER_ADDR']}\nPHP version : " . PHP_VERSION . "\nPlatform : " . PHP_OS . "\n$head\n";

        $totalTime = $totalTime + $this->benchmark_Math();
        $totalTime = $totalTime + $this->benchmark_StringManipulation();
        $totalTime = $totalTime + $this->benchmark_Loops();
        $totalTime = $totalTime + $this->benchmark_IfElse();


        echo str_pad("#", 40, "#") . "\n" . str_pad("Total:", 27) . " : " . number_format($totalTime, 3) . " sec.</pre>";
    }

    function microtime_float()
    {
        list($usec, $sec) = explode(" ", microtime());
        return ((float) $usec + (float) $sec);
    }

    function benchmark_Math($runCount = 150000)
    {
        $startTime = $this->microtime_float();
        $functions = array("abs", "acos", "asin", "atan", "bindec", "floor", "exp", "sin", "tan", "pi", "is_finite", "is_nan", "sqrt");
        for ($i = 0; $i < $runCount; $i++) {
            foreach ($functions as $function) {
                 call_user_func_array($function, array($i));
            }
        }
        $time = $this->microtime_float() - $startTime;
        echo str_pad("Math", 27) . " : " . number_format($time, 3) . " sec.\n";
        return $time;
    }

    function benchmark_StringManipulation($runCount = 150000)
    {
        $startTime = $this->microtime_float();
        $functions = array("addslashes", "chunk_split", "metaphone", "strip_tags", "md5", "sha1", "strtoupper", "strtolower", "strrev", "strlen", "soundex", "ord");
        $string = "the quick brown fox jumps over the lazy dog";
        for ($i = 0; $i < $runCount; $i++) {
            foreach ($functions as $function) {
                 call_user_func_array($function, array($string));
            }
        }
        $time = $this->microtime_float() - $startTime;
        echo str_pad("String Manipulation", 27) . " : " . number_format($time, 3) . " sec.\n";
        return $time;
    }

    function benchmark_Loops($runCount = 10000000)
    {
        $startTime = $this->microtime_float();
        for ($i = 0; $i < $runCount; ++$i)
            ;
        $i = 0;
        while ($i < $runCount)
            ++$i;
        $time = $this->microtime_float() - $startTime;
        echo str_pad("Loops", 27) . " : " . number_format($time, 3) . " sec.\n";
        return $time;
    }

    function benchmark_IfElse($runCount = 10000000)
    {
        $startTime = $this->microtime_float();
        for ($i = 0; $i < $runCount; $i++) {
            if ($i == -1) {
                
            } elseif ($i == -2) {
                
            } else if ($i == -3) {
                
            }
        }
        $time = $this->microtime_float() - $startTime;
        echo str_pad("If/Else", 27) . " : " . number_format($time, 3) . " sec.\n";
        return $time;
    }

}

new benchmark();

benchmark_detailed.php

 <?php

// php benchmarker by Paul Taulborg (njaguar at http://forums.d2jsp.org) - Modified by Jeroen Post


$timer = new benchmarkTimer();


$head = str_pad("#", 36, "#");

echo "<pre>" . str_pad(' PHP ' . PHP_VERSION . ' BENCHMARK ', 36, "#", STR_PAD_BOTH) . "\nStart : " . date("m/d/Y H:i:s a") . "\nServer : {$_SERVER['SERVER_NAME']}@{$_SERVER['SERVER_ADDR']}\nPlatform : " . PHP_OS . "\nPHP version: ".phpversion()."\n$head\n";

$run_times = 1000000;
$run_times_slow_function = 10000;

$string_1 = 'bob & jim & tim & kim & me & you are &&&& =%"';
$string_2 = '     what      ';
$string_3 = strtoupper($string_1);
$string_4 = '1234a';
$string_5 = '64x32';
$string_6 = 'this is a link to http://google.com which is a really popular site';
$string_7 = 'number %d is like a string %s that likes to hex %x it out';
$string_8 = $string_7 . ' and then some';
$string_9 = 'quotes\'are "fun" to use\'. Most of the time. \\ ya';

$array_1 = array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h' => 1, 'i' => 2, 'j' => 0);
$array_2 = array('coffee', 'brown', 'caffeine');

$time_1 = '12/29/2011 10:15:37pm';

$now = time();


$timer->start();

for ($i = 0; $i < $run_times; ++$i)
    ;

$timer->stop('for');



$timer->start();

while ($i > 0)
    --$i;

$timer->stop('while');



$timer->start();

for ($i = 0; $i < $run_times; $i++) {

    $z = $i % 4;

    if ($z == 0) {
        
    } else if ($z == 1) {
        
    } else if ($z == 2) {
        
    } else {
        
    }
}

$timer->stop('if else');



$timer->start();

for ($i = 0; $i < $run_times; $i++) {

    $z = $i % 4;

    switch ($z)
    {

        case 0: break;

        case 1: break;

        case 2: break;

        default: break;
    }
}

$timer->stop('switch');



$timer->start();

for ($i = 0; $i < $run_times; $i++) {

    $z = ($i % 2 == 0 ? 1 : 0);
}

$timer->stop('Ternary');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    str_replace('&', '&amp;', $string_1);

$timer->stop('str_replace');



$timer->start();

for ($i = 0; $i < $run_times_slow_function; $i++)
    preg_replace("#(^|\s)(http[s]?://\w+[^\s\[\]\<]+)#i", '\1<a href="\2">\2</a>', $string_6);

$timer->stop('preg_replace');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    preg_match("#http[s]?://\w+[^\s\[\]\<]+#", $string_6);

$timer->stop('preg_match');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    count($array_1);

$timer->stop('count');



$timer->start();

for ($i = 0; $i < $run_times; $i++) {

    isset($array_1['i']);

    isset($array_1['zzNozz']);
}

$timer->stop('isset');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    time();

$timer->stop('time');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    strlen($string_1);

$timer->stop('strlen');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    sprintf($string_7, $i, $string_5, $i);

$timer->stop('sprintf');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    strcmp($string_7, $string_8);

$timer->stop('strcmp');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    trim($string_2);

$timer->stop('trim');



$timer->start();

for ($i = 0; $i < $run_times_slow_function; $i++)
    explode('&', $string_1);

$timer->stop('explode');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    implode('&', $array_1);

$timer->stop('implode');



$f1 = $timer->totalTime;

$timer->start();

for ($i = 0; $i < $run_times; $i++)
    number_format($f1, 3);

$timer->stop('number_format');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    floor($f1);

$timer->stop('floor');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    strpos($string_2, 't');

$timer->stop('strpos');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    substr($string_1, 10);

$timer->stop('substr');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    intval($string_4);

$timer->stop('intval');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    (int) $string_4;

$timer->stop('(int)');



$timer->start();

for ($i = 0; $i < $run_times; $i++) {

    is_array($array_1);

    is_array($string_1);
}

$timer->stop('is_array');



$timer->start();

for ($i = 0; $i < $run_times; $i++) {

    is_numeric($f1);

    is_numeric($string_4);
}

$timer->stop('is_numeric');



$timer->start();

for ($i = 0; $i < $run_times; $i++) {

    is_int($f1);

    is_int($string_4);
}

$timer->stop('is_int');



$timer->start();

for ($i = 0; $i < $run_times; $i++) {

    is_string($f1);

    is_string($string_4);
}

$timer->stop('is_string');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    ip2long('1.2.3.4');

$timer->stop('ip2long');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    long2ip(89851921);

$timer->stop('long2ip');



$timer->start();

for ($i = 0; $i < $run_times_slow_function; $i++)
    date('F j, Y, g:i a', $now);

$timer->stop('date');



$timer->start();

for ($i = 0; $i < $run_times_slow_function; $i++)
    strftime('%B %e, %Y, %l:%M %P', $now);

$timer->stop('strftime');



$timer->start();

for ($i = 0; $i < $run_times_slow_function; $i++)
    strtotime($time_1);

$timer->stop('strtotime');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    strtolower($string_3);

$timer->stop('strtolower');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    strtoupper($string_1);

$timer->stop('strtoupper');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    md5($string_1);

$timer->stop('md5');



$timer->start();

for ($i = 0; $i < $run_times; $i++) {

    unset($array_1['j']);

    $array_1['j'] = 0;
}

$timer->stop('unset');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    list($drink, $run_timesolor, $power) = $array_2;

$timer->stop('list');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    urlencode($string_1);

$timer->stop('urlencode');



$string_1e = urlencode($string_1);

$timer->start();

for ($i = 0; $i < $run_times; $i++)
    urldecode($string_1e);

$timer->stop('urldecode');



$timer->start();

for ($i = 0; $i < $run_times; $i++)
    addslashes($string_9);

$timer->stop('addslashes');



$string_9e = addslashes($string_9);

$timer->start();

for ($i = 0; $i < $run_times; $i++)
    stripslashes($string_9e);

$timer->stop('stripslashes');







echo $head . "\n" . str_pad("Total", 23) . " : " . number_format($timer->totalTime, 3) . " sec</pre>\n";

exit; // all done

class benchmarkTimer
{

    var $startTime;
    var $totalTime = 0;

    function start()
    {
        // use this method, because old php 4.x branches do not support the parameter to return a float
        list($usec, $string_ec) = explode(" ", microtime());

        $this->startTime = ((float) $usec + (float) $string_ec);
    }

    function stop($time_itle)
    {

        list($usec, $string_ec) = explode(" ", microtime());

        $time = ((float) $usec + (float) $string_ec) - $this->startTime;



        echo str_pad($time_itle, 23) . " : " . number_format($time, 5) . " sec\n";

        $this->totalTime += $time;
    }

}