Double counting an insert in the db

Question

When I run the following code – the INSERT INTO occurrence seems to repeat itself – Thus, I am double counting each word:
Example, if I have three words, (Help, Hope & Peace) – each word is placed in the word table – but, when inserted into the occurrence table, it puts them in thusly:
Help
Hope
Peace
Help
Hope
Peace
It does it twice.  Can you help me find out why so that I can find a fix?
CODE:
<?
mysql_select_db($database_connDB, $connDB);
$url = addslashes( $_GET['url'] );
if( !$url )
   die( "You need to define a URL to process." );
else if( substr($url,0,7) != "http://" )
   $url = "http://$url";
$result = mysql_query("SELECT page_id FROM page WHERE page_url = \"$url\"");
$row = mysql_fetch_array($result);
if( $row['page_id'] )
   $page_id = $row['page_id'];
else
   mysql_query("INSERT INTO page (page_url, page_title, page_description) VALUES (\"$url\", 'No Title', 'No Description Provided')");
   $page_id = mysql_insert_id();
if( !($fd = fopen($url,"r")) )
   die( "Could not open URL!" );
while( $buf = fgets($fd,1024) )
   $buf = trim($buf);
   $buf = strip_tags($buf);
   $buf = ereg_replace('/&\w;/', '', $buf);
   preg_match_all("/(\b[\w+]+\b)/",$buf,$words);
   for( $i = 0; $words[$i]; $i++ )
     for( $j = 0; $words[$i][$j]; $j++)
      $cur_word = addslashes( strtolower($words[$i][$j]) );
         $result = mysql_query("SELECT word_id FROM word
                                WHERE word_word = '$cur_word'");
         $row = mysql_fetch_array($result);
         if( $row['word_id'] )
            $word_id = $row['word_id'];
         else
            $results = mysql_query("SELECT common_id FROM common WHERE common_common = '$cur_word'");
                                    $row = mysql_fetch_array($results);
                                    if( !$row['common_id'])
                                    mysql_query("INSERT INTO word (word_word) VALUES (\"$cur_word\")");
            $word_id = mysql_insert_id();
                                    else
                                    $common_id = $row['common_id'];
         mysql_query("INSERT INTO occurrence (word_id,page_id)
                      VALUES ($word_id,$page_id)");
?>

Answer 1

Trying something different.