note 80603 added to function.strncmp

I ran the following experiment to compare arrays. 1 st - using (substr($key,0,5 == "HTTP_") & 2 nd - using (!strncmp($key, 'HTTP_', 5)) I wanted to work out the fastest way to get the first few characters from a array BENCHMARK ITERATION RESULT IS: if (substr($key,0,5 == "HTTP_").... - 0,000481s if (!strncmp($key, 'HTTP_', 5)).... - 0,000405s strncmp() is 20% faster than substr() :D <?php // SAMPLE FUNCTION function strncmp_match($arr) { foreach ($arr as $key => $val) { //if (substr($key,0,5 == "HTTP_") if (!strncmp($key, 'HTTP_', 5)) { $out[$key] = $val; } } return $out; } // EXAMPLE USE ?><pre><?php print_r(strncmp_match($_SERVER)); ?></pre> will display code like this: Array ( [HTTP_ACCEPT] => XXX [HTTP_ACCEPT_LANGUAGE] => pl [HTTP_UA_CPU] => x64 [HTTP_ACCEPT_ENCODING] => gzip, deflate [HTTP_USER_AGENT] => Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727) [HTTP_HOST] => XXX.XXX.XXX.XXX [HTTP_CONNECTION] => Keep-Alive [HTTP_COOKIE] => __utma=XX;__utmz=XX.utmccn=(direct)|utmcsr=(direct)|utmcmd=(none) ) ---- Server IP: 82.160.94.10 Probable Submitter: 81.210.63.146 ---- Manual Page -- http://www.php.net/manual/en/function.strncmp.php Edit -- https://master.php.net/note/edit/80603 Del: integrated -- https://master.php.net/note/delete/80603/integrated Del: useless -- https://master.php.net/note/delete/80603/useless Del: bad code -- https://master.php.net/note/delete/80603/bad+code Del: spam -- https://master.php.net/note/delete/80603/spam Del: non-english -- https://master.php.net/note/delete/80603/non-english Del: in docs -- https://master.php.net/note/delete/80603/in+docs Del: other reasons-- https://master.php.net/note/delete/80603 Reject -- https://master.php.net/note/reject/80603 Search -- https://master.php.net/manage/user-notes.php