// A stopwords list is a collection of commonly used words in a language
// that are often removed during text processing tasks.
function remove_stop_words($arr) {
$stopWords = array(
"i", "me", "my", "myself", "we", "our", "ours", "ourselves", "you", "your",
"yours", "yourself", "yourselves", "he", "him", "his", "himself", "she", "her",
"hers", "herself", "it", "its", "itself", "they", "them", "their", "theirs",
"themselves", "what", "which", "who", "whom", "this", "that", "these", "those",
"am", "is", "are", "was", "were", "be", "been", "being", "have", "has", "had",
"having", "do", "does", "did", "doing", "a", "an", "the", "and", "but", "if", "or",
"because", "as", "until", "while", "of", "at", "by", "for", "with", "about", "against",
"between", "into", "through", "during", "before", "after", "above", "below", "to",
"from", "in", "out", "on", "off", "over", "under", "again", "further", "then", "once",
"here", "there", "when", "where", "why", "how", "all", "any", "both", "each", "few",
"more", "most", "other", "some", "such", "no", "nor", "not", "only", "own", "same",
"so", "than", "too", "very", "can", "will", "just", "don", "should", "now"
);
foreach($stopWords as $word) {
for ($i = 0; $i < count($arr); $i++)
if ($arr[$i] == $word)
$arr[$i] = "";
}
$s = implode(" ", $arr);
return trim(preg_replace('/\s+/', ' ',$s));
}
$s = "a php and java to python a we if c# then a and aa";
$arr = explode(" ", $s);
echo $s . "\n";
$s = remove_stop_words($arr);
echo $s;
/*
run:
a php and java to python a we if c# then a and aa
php java python c# aa
*/
