Trying to run some PHP on a HTML site not working

I am trying to run a small code to replace the keyword but it is not working.

I did this already

http://php.about.com/od/advancedphp/p/html_php.htm

<?php
/* 
** Extracts and formats meta tag content 
*/ 

function get_meta_data($url, $searchkey='') {    
    $data = get_meta_tags($url);    // get the meta data in an array 
    foreach($data as $key => $value) { 
        if(mb_detect_encoding($value, 'UTF-8, ISO-8859-1', true) != 'ISO-8859-1') {    // check whether the content is UTF-8 or ISO-8859-1 
            $value = utf8_decode($value);    // if UTF-8 decode it 
        } 
        $value = strtr($value, get_html_translation_table(HTML_ENTITIES));    // mask the content 
        if($searchkey != '') {    // if only one meta tag is in demand e.g. 'description' 
            if($key == $searchkey) { 
                $str = $value;    // just return the value 
            } 
        } else {    // all meta tags 
            $pattern = '/ |,/i';    // ' ' or ',' 
            $array = preg_split($pattern, $value, -1, PREG_SPLIT_NO_EMPTY);    // split it in an array, so we have the count of words            
            $str .= '<p><span style="display:block;color:#000000;font-weight:bold;">' . $key . ' <span style="font-weight:normal;">(' . count($array) . ' words | ' . strlen($value) . ' chars)</span></span>' . $value . '</p>';    // format data with count of words and chars 
        } 
    } 
    return $str; 
} 

$urlpage = "http://www.example.com";
$urlpage = $urlpage.$_SERVER["PHP_SELF"];
//echo $urlpage;
//echo "<br /><br />";

//$content .= get_meta_data($urlpage); 
/* 
output looks like this: 

description (23 words | 167 chars) 
SELFHTML 8.1.2 - Die bekannte Dokumentation zu HTML, JavaScript und CGI/Perl - Tutorial und Referenz, mit etlichen Zusatztips zu Design, Grafik, Projektverwaltung usw. 

keywords (13 words | 119 chars) 
SELFHTML, HTML, Dynamic HTML, JavaScript, CGI, Perl, Grafik, WWW-Seiten, Web-Seiten, Hilfe, Dokumentation, Beschreibung 

etc. 

*/ 

$content = get_meta_data($urlpage, "description"); 
//$content .= get_meta_data($urlpage, "description"); 
//echo $content;
/* 
output looks like this: 

SELFHTML 8.1.2 - Die bekannte Dokumentation zu HTML, JavaScript und CGI/Perl - Tutorial und Referenz, mit etlichen Zusatztips zu Design, Grafik, Projektverwaltung usw. 
*/ 
?>

PHP:

 

Did you try :

AddHandler application/x-httpd-php .html .htm 

PHP:

..and or for php 5

AddHandler application/x-httpd-php5 .html .htm 

PHP:

 

yes thanks i did i must made some mistake in my code i do not know really whats the problem.