gistfile1.php

<?php
 
/*
Took 10.474477052689 seconds
Took 12.499534845352 seconds
*/
set_time_limit( 0 );
 
$searchText = 'Page and Brin originally nicknamed THEIR new search engine "BackRub", because the system checked backlinks to estimate the importance of a site.';
 
$start = microtime_float();
for( $i = 0 ; $i < 1000000 ; $i++ )
{
    preg_match_all("/[A-Z]{1}[a-zA-z]*/", $searchText, $matches );
}
$total = microtime_float() - $start;
echo "Took $total seconds<br/>";
 
 
$str = $searchText;
$start = microtime_float();
for( $i = 0 ; $i < 1000000 ; $i++ )
{
    foreach (str_word_count($str, 1) as $key => $value) {
        if (ctype_upper($value)) $arr[] = $value;
    }
}
$total = microtime_float() - $start;
echo "Took $total seconds<br/>";
 

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