stop words function

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stop words function This simple php script is a function that takes a list of stop words (commnly occuring words that are of no use to a search engine) and strips them out of a variable term. This is similar to google removal of common words.


<?php
function stopWords($term, $stopwords_file)
    {
        
    //load list of common words
    $common = file($stopwords_file);
    $total = count($common);    
    for ($x=0; $x<= $total; $x++)
    {
        $common[$x] = trim(strtolower($common[$x]));
    }
    
    //make array of search terms        
    $_terms = explode(" ", $term);
    
        foreach ($_terms as $line)
        {
            if (in_array(strtolower(trim($line)), $common))
            {                
                $removeKey = array_search($line, $this->_terms);
                unset($_terms[$removeKey]);                
            }
            else
            {
                $clean_term .= " ".$line;
            }
        }
        return $clean_term;    
    }
?>

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