英文短句提取SEO关键词

这个就是利用去掉高频词后得到词组作为tag的函数

包含一个轻量级的英文高频词词库 740多个

下面是代码和使用实例

有问题可以讨论
一个项目使用到的

<?
function extractkeywords($string){
      //$stopWords = array('a', 'able', 'about', 'across', 'after', 'all', 'almost', 'also', 'am', 'among', 'an', 'and', 'any', 'are', 'as', 'at', 'be', 'because', 'been', 'but', 'by', 'can', 'cannot', 'could', 'dear', 'did', 'do', 'does', 'either', 'else', 'ever', 'every', 'for', 'from', 'get', 'got', 'had', 'has', 'have', 'he', 'her', 'hers', 'him', 'his', 'how', 'however', 'i', 'if', 'in', 'into', 'is', 'it', 'its', 'just', 'least', 'let', 'like', 'likely', 'may', 'me', 'might', 'most', 'must', 'my', 'neither', 'no', 'nor', 'not', 'of', 'off', 'often', 'on', 'only', 'or', 'other', 'our', 'own', 'rather', 'said', 'say', 'says', 'she', 'should', 'since', 'so', 'some', 'than', 'that', 'the', 'their', 'them', 'then', 'there', 'these', 'they', 'this', 'tis', 'to', 'too', 'twas', 'us', 'wants', 'was', 'we', 'were', 'what', 'when', 'where', 'which', 'while', 'who', 'whom', 'why', 'will', 'with', 'would', 'yet', 'you', 'your');
	  $stopwords = array("a","able","about","above","abst","accordance","according","accordingly","across","act","actually","added","adj","affected","affecting","affects","after","afterwards","again","against","ah","all","almost","alone","along","already","also","although","always","am","among","amongst","an","and","announce","another","any","anybody","anyhow","anymore","anyone","anything","anyway","anyways","anywhere","apparently","approximately","are","aren","arent","arise","around","as","aside","ask","asking","at","auth","available","away","awfully","b","back","be","became","because","become","becomes","becoming","been","before","beforehand","begin","beginning","beginnings","begins","behind","being","believe","below","beside","besides","between","beyond","biol","both","brief","briefly","but","by","c","ca","came","can","cannot","can't","cause","causes","certain","certainly","co","com","come","comes","contain","containing","contains","could","couldnt","d","date","did","didn't","different","do","does","doesn't","doing","done","don't","down","downwards","due","during","e","each","ed","edu","effect","eg","eight","eighty","either","else","elsewhere","end","ending","enough","especially","et","et-al","etc","even","ever","every","everybody","everyone","everything","everywhere","ex","except","f","far","few","ff","fifth","first","five","fix","followed","following","follows","for","former","formerly","forth","found","four","from","further","furthermore","g","gave","get","gets","getting","give","given","gives","giving","go","goes","gone","got","gotten","h","had","happens","hardly","has","hasn't","have","haven't","having","he","hed","hence","her","here","hereafter","hereby","herein","heres","hereupon","hers","herself","hes","hi","hid","him","himself","his","hither","home","how","howbeit","however","hundred","i","id","ie","if","i'll","im","immediate","immediately","importance","important","in","inc","indeed","index","information","instead","into","invention","inward","is","isn't","it","itd","it'll","its","itself","i've","j","just","k","keep","keeps","kept","kg","km","know","known","knows","l","largely","last","lately","later","latter","latterly","least","less","lest","let","lets","like","liked","likely","line","little","'ll","look","looking","looks","ltd","m","made","mainly","make","makes","many","may","maybe","me","mean","means","meantime","meanwhile","merely","mg","might","million","miss","ml","more","moreover","most","mostly","mr","mrs","much","mug","must","my","myself","n","na","name","namely","nay","nd","near","nearly","necessarily","necessary","need","needs","neither","never","nevertheless","new","next","nine","ninety","no","nobody","non","none","nonetheless","noone","nor","normally","nos","not","noted","nothing","now","nowhere","o","obtain","obtained","obviously","of","off","often","oh","ok","okay","old","omitted","on","once","one","ones","only","onto","or","ord","other","others","otherwise","ought","our","ours","ourselves","out","outside","over","overall","owing","own","p","page","pages","part","particular","particularly","past","per","perhaps","placed","please","plus","poorly","possible","possibly","potentially","pp","predominantly","present","previously","primarily","probably","promptly","proud","provides","put","q","que","quickly","quite","qv","r","ran","rather","rd","re","readily","really","recent","recently","ref","refs","regarding","regardless","regards","related","relatively","research","respectively","resulted","resulting","results","right","run","s","said","same","saw","say","saying","says","sec","section","see","seeing","seem","seemed","seeming","seems","seen","self","selves","sent","seven","several","shall","she","shed","she'll","shes","should","shouldn't","show","showed","shown","showns","shows","significant","significantly","similar","similarly","since","six","slightly","so","some","somebody","somehow","someone","somethan","something","sometime","sometimes","somewhat","somewhere","soon","sorry","specifically","specified","specify","specifying","still","stop","strongly","sub","substantially","successfully","such","sufficiently","suggest","sup","sure","t","take","taken","taking","tell","tends","th","than","thank","thanks","thanx","that","that'll","thats","that've","the","their","theirs","them","themselves","then","thence","there","thereafter","thereby","thered","therefore","therein","there'll","thereof","therere","theres","thereto","thereupon","there've","these","they","theyd","they'll","theyre","they've","think","this","those","thou","though","thoughh","thousand","throug","through","throughout","thru","thus","til","tip","to","together","too","took","toward","towards","tried","tries","truly","try","trying","ts","twice","two","u","un","under","unfortunately","unless","unlike","unlikely","until","unto","up","upon","ups","us","use","used","useful","usefully","usefulness","uses","using","usually","v","value","various","'ve","very","via","viz","vol","vols","vs","w","want","wants","was","wasn't","way","we","wed","welcome","we'll","went","were","weren't","we've","what","whatever","what'll","whats","when","whence","whenever","where","whereafter","whereas","whereby","wherein","wheres","whereupon","wherever","whether","which","while","whim","whither","who","whod","whoever","whole","who'll","whom","whomever","whos","whose","why","widely","willing","wish","with","within","without","won't","words","world","would","wouldn't","www","x","y","yes","yet","you","youd","you'll","your","youre","yours","yourself","yourselves","you've","z","zero");
   
      $string = preg_replace('/\s\s+/i', '', $string); // replace whitespace
      $string = trim($string); // trim the string
      $string = preg_replace('/[^a-zA-Z0-9 -]/', '', $string); // only take alphanumerical characters, but keep the spaces and dashes too…
      $string = strtolower($string); // make it lowercase
   
      preg_match_all('/\b.*?\b/i', $string, $matchWords);
      $matchWords = $matchWords[0];
      
      foreach ( $matchWords as $key=>$item ) {
          if ( $item == '' || in_array(strtolower($item), $stopwords) || strlen($item) <= 3 ) {
              unset($matchWords[$key]);
          }
      }   
      $wordCountArr = array();
      if ( is_array($matchWords) ) {
          foreach ( $matchWords as $key => $val ) {
              $val = strtolower($val);
              if ( isset($wordCountArr[$val]) ) {
                  $wordCountArr[$val]++;
              } else {
                  $wordCountArr[$val] = 1;
              }
          }
      }
      arsort($wordCountArr);
      $wordCountArr = array_slice($wordCountArr, 0, 10);
      return $wordCountArr;
}
?>

function extractkeywords($string){

//$stopWords = array('a', 'able', 'about', 'across', 'after', 'all', 'almost', 'also', 'am', 'among', 'an', 'and', 'any', 'are', 'as', 'at', 'be', 'because', 'been', 'but', 'by', 'can', 'cannot', 'could', 'dear', 'did', 'do', 'does', 'either', 'else', 'ever', 'every', 'for', 'from', 'get', 'got', 'had', 'has', 'have', 'he', 'her', 'hers', 'him', 'his', 'how', 'however', 'i', 'if', 'in', 'into', 'is', 'it', 'its', 'just', 'least', 'let', 'like', 'likely', 'may', 'me', 'might', 'most', 'must', 'my', 'neither', 'no', 'nor', 'not', 'of', 'off', 'often', 'on', 'only', 'or', 'other', 'our', 'own', 'rather', 'said', 'say', 'says', 'she', 'should', 'since', 'so', 'some', 'than', 'that', 'the', 'their', 'them', 'then', 'there', 'these', 'they', 'this', 'tis', 'to', 'too', 'twas', 'us', 'wants', 'was', 'we', 'were', 'what', 'when', 'where', 'which', 'while', 'who', 'whom', 'why', 'will', 'with', 'would', 'yet', 'you', 'your');

$stopwords = array("a","able","about","above","abst","accordance","according","accordingly","across","act","actually","added","adj","affected","affecting","affects","after","afterwards","again","against","ah","all","almost","alone","along","already","also","although","always","am","among","amongst","an","and","announce","another","any","anybody","anyhow","anymore","anyone","anything","anyway","anyways","anywhere","apparently","approximately","are","aren","arent","arise","around","as","aside","ask","asking","at","auth","available","away","awfully","b","back","be","became","because","become","becomes","becoming","been","before","beforehand","begin","beginning","beginnings","begins","behind","being","believe","below","beside","besides","between","beyond","biol","both","brief","briefly","but","by","c","ca","came","can","cannot","can't","cause","causes","certain","certainly","co","com","come","comes","contain","containing","contains","could","couldnt","d","date","did","didn't","different","do","does","doesn't","doing","done","don't","down","downwards","due","during","e","each","ed","edu","effect","eg","eight","eighty","either","else","elsewhere","end","ending","enough","especially","et","et-al","etc","even","ever","every","everybody","everyone","everything","everywhere","ex","except","f","far","few","ff","fifth","first","five","fix","followed","following","follows","for","former","formerly","forth","found","four","from","further","furthermore","g","gave","get","gets","getting","give","given","gives","giving","go","goes","gone","got","gotten","h","had","happens","hardly","has","hasn't","have","haven't","having","he","hed","hence","her","here","hereafter","hereby","herein","heres","hereupon","hers","herself","hes","hi","hid","him","himself","his","hither","home","how","howbeit","however","hundred","i","id","ie","if","i'll","im","immediate","immediately","importance","important","in","inc","indeed","index","information","instead","into","invention","inward","is","isn't","it","itd","it'll","its","itself","i've","j","just","k","keep","keeps","kept","kg","km","know","known","knows","l","largely","last","lately","later","latter","latterly","least","less","lest","let","lets","like","liked","likely","line","little","'ll","look","looking","looks","ltd","m","made","mainly","make","makes","many","may","maybe","me","mean","means","meantime","meanwhile","merely","mg","might","million","miss","ml","more","moreover","most","mostly","mr","mrs","much","mug","must","my","myself","n","na","name","namely","nay","nd","near","nearly","necessarily","necessary","need","needs","neither","never","nevertheless","new","next","nine","ninety","no","nobody","non","none","nonetheless","noone","nor","normally","nos","not","noted","nothing","now","nowhere","o","obtain","obtained","obviously","of","off","often","oh","ok","okay","old","omitted","on","once","one","ones","only","onto","or","ord","other","others","otherwise","ought","our","ours","ourselves","out","outside","over","overall","owing","own","p","page","pages","part","particular","particularly","past","per","perhaps","placed","please","plus","poorly","possible","possibly","potentially","pp","predominantly","present","previously","primarily","probably","promptly","proud","provides","put","q","que","quickly","quite","qv","r","ran","rather","rd","re","readily","really","recent","recently","ref","refs","regarding","regardless","regards","related","relatively","research","respectively","resulted","resulting","results","right","run","s","said","same","saw","say","saying","says","sec","section","see","seeing","seem","seemed","seeming","seems","seen","self","selves","sent","seven","several","shall","she","shed","she'll","shes","should","shouldn't","show","showed","shown","showns","shows","significant","significantly","similar","similarly","since","six","slightly","so","some","somebody","somehow","someone","somethan","something","sometime","sometimes","somewhat","somewhere","soon","sorry","specifically","specified","specify","specifying","still","stop","strongly","sub","substantially","successfully","such","sufficiently","suggest","sup","sure","t","take","taken","taking","tell","tends","th","than","thank","thanks","thanx","that","that'll","thats","that've","the","their","theirs","them","themselves","then","thence","there","thereafter","thereby","thered","therefore","therein","there'll","thereof","therere","theres","thereto","thereupon","there've","these","they","theyd","they'll","theyre","they've","think","this","those","thou","though","thoughh","thousand","throug","through","throughout","thru","thus","til","tip","to","together","too","took","toward","towards","tried","tries","truly","try","trying","ts","twice","two","u","un","under","unfortunately","unless","unlike","unlikely","until","unto","up","upon","ups","us","use","used","useful","usefully","usefulness","uses","using","usually","v","value","various","'ve","very","via","viz","vol","vols","vs","w","want","wants","was","wasn't","way","we","wed","welcome","we'll","went","were","weren't","we've","what","whatever","what'll","whats","when","whence","whenever","where","whereafter","whereas","whereby","wherein","wheres","whereupon","wherever","whether","which","while","whim","whither","who","whod","whoever","whole","who'll","whom","whomever","whos","whose","why","widely","willing","wish","with","within","without","won't","words","world","would","wouldn't","www","x","y","yes","yet","you","youd","you'll","your","youre","yours","yourself","yourselves","you've","z","zero");

$string = preg_replace('/\s\s+/i', '', $string); // replace whitespace

$string = trim($string); // trim the string

$string = preg_replace('/[^a-zA-Z0-9 -]/', '', $string); // only take alphanumerical characters, but keep the spaces and dashes too…

$string = strtolower($string); // make it lowercase

preg_match_all('/\b.*?\b/i', $string, $matchWords);

$matchWords = $matchWords[0];

foreach ( $matchWords as $key=>$item ) {

if ( $item == '' || in_array(strtolower($item), $stopwords) || strlen($item) <= 3 ) {

unset($matchWords[$key]);

}

$wordCountArr = array();

if ( is_array($matchWords) ) {

foreach ( $matchWords as $key => $val ) {

$val = strtolower($val);

if ( isset($wordCountArr[$val]) ) {

$wordCountArr[$val]++;

} else {

$wordCountArr[$val] = 1;

}

arsort($wordCountArr);

$wordCountArr = array_slice($wordCountArr, 0, 10);

return $wordCountArr;

}

使用方式

<?
$text = "This is some text. This is some text. Vending Machines are great.";
$words = extractkeywords($text);
echo implode(',', array_keys($words));
# 得到 text,machines,vending
?>

$text = "This is some text. This is some text. Vending Machines are great.";

$words = extractkeywords($text);

echo implode(',', array_keys($words));

# 得到 text,machines,vending

英文短句提取SEO关键词

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