<?php
/////////////////////////////////////////////////////////////
/*
* Name: phpSEO
* URL: http:/neo22s.com/phpseo
* Version: v0.3
* Date: 17/02/2010
* Author: Chema Garrido
* Support: http:/neo22s.com/phpseo
* License: GPL v3
* Notes: Based on http://neo22s.com/seo-functions-for-php/
*/
class phpSEO{
//private variables
private $text;//text to work with
private $maxDescriptionLen=220;//max len for the meta description
private $maxKeywords=25;//mix number of keywords to return
private $minWordLen=4;//min len for a word
private $charset='UTF-8';//default charset to use
//banned words in english feel free to change them
private $bannedWords=array('able', 'about', 'above', 'act', 'add', 'afraid', 'after', 'again', 'against', 'age', 'ago', 'agree', 'all', 'almost', 'alone', 'along', 'already', 'also', 'although', 'always', 'am', 'amount', 'an', 'and', 'anger', 'angry', 'animal', 'another', 'answer', 'any', 'appear', 'apple', 'are', 'arrive', 'arm', 'arms', 'around', 'arrive', 'as', 'ask', 'at', 'attempt', 'aunt', 'away', 'back', 'bad', 'bag', 'bay', 'be', 'became', 'because', 'become', 'been', 'before', 'began', 'begin', 'behind', 'being', 'bell', 'belong', 'below', 'beside', 'best', 'better', 'between', 'beyond', 'big', 'body', 'bone', 'born', 'borrow', 'both', 'bottom', 'box', 'boy', 'break', 'bring', 'brought', 'bug', 'built', 'busy', 'but', 'buy', 'by', 'call', 'came', 'can', 'cause', 'choose', 'close', 'close', 'consider', 'come', 'consider', 'considerable', 'contain', 'continue', 'could', 'cry', 'cut', 'dare', 'dark', 'deal', 'dear', 'decide', 'deep', 'did', 'die', 'do', 'does', 'dog', 'done', 'doubt', 'down', 'during', 'each', 'ear', 'early', 'eat', 'effort', 'either', 'else', 'end', 'enjoy', 'enough', 'enter', 'even', 'ever', 'every', 'except', 'expect', 'explain', 'fail', 'fall', 'far', 'fat', 'favor', 'fear', 'feel', 'feet', 'fell', 'felt', 'few', 'fill', 'find', 'fit', 'fly', 'follow', 'for', 'forever', 'forget', 'from', 'front', 'gave', 'get', 'gives', 'goes', 'gone', 'good', 'got', 'gray', 'great', 'green', 'grew', 'grow', 'guess', 'had', 'half', 'hang', 'happen', 'has', 'hat', 'have', 'he', 'hear', 'heard', 'held', 'hello', 'help', 'her', 'here', 'hers', 'high', 'hill', 'him', 'his', 'hit', 'hold', 'hot', 'how', 'however', 'I', 'if', 'ill', 'in', 'indeed', 'instead', 'into', 'iron', 'is', 'it', 'its', 'just', 'keep', 'kept', 'knew', 'know', 'known', 'late', 'least', 'led', 'left', 'lend', 'less', 'let', 'like', 'likely', 'likr', 'lone', 'long', 'look', 'lot', 'make', 'many', 'may', 'me', 'mean', 'met', 'might', 'mile', 'mine', 'moon', 'more', 'most', 'move', 'much', 'must', 'my', 'near', 'nearly', 'necessary', 'neither', 'never', 'next', 'no', 'none', 'nor', 'not', 'note', 'nothing', 'now', 'number', 'of', 'off', 'often', 'oh', 'on', 'once', 'only', 'or', 'other', 'ought', 'our', 'out', 'please', 'prepare', 'probable', 'pull', 'pure', 'push', 'put', 'raise', 'ran', 'rather', 'reach', 'realize', 'reply', 'require', 'rest', 'run', 'said', 'same', 'sat', 'saw', 'say', 'see', 'seem', 'seen', 'self', 'sell', 'sent', 'separate', 'set', 'shall', 'she', 'should', 'side', 'sign', 'since', 'so', 'sold', 'some', 'soon', 'sorry', 'stay', 'step', 'stick', 'still', 'stood', 'such', 'sudden', 'suppose', 'take', 'taken', 'talk', 'tall', 'tell', 'ten', 'than', 'thank', 'that', 'the', 'their', 'them', 'then', 'there', 'therefore', 'these', 'they', 'this', 'those', 'though', 'through', 'till', 'to', 'today', 'told', 'tomorrow', 'too', 'took', 'tore', 'tought', 'toward', 'tried', 'tries', 'trust', 'try', 'turn', 'two', 'under', 'until', 'up', 'upon', 'us', 'use', 'usual', 'various', 'verb', 'very', 'visit', 'want', 'was', 'we', 'well', 'went', 'were', 'what', 'when', 'where', 'whether', 'which', 'while', 'white', 'who', 'whom', 'whose', 'why', 'will', 'with', 'within', 'without', 'would', 'yes', 'yet', 'you', 'young', 'your', 'br', 'img', 'p','lt', 'gt', 'quot', 'copy');
//private $bannedWords=array();
function phpSEO($text='',$charset='UTF-8'){//constructor
$this->setText($text);
$this->charset=$charset;
}
///SEO for meta description
function getMetaDescription($len=null){//returns a text with meta description
$this->setDescriptionLen($len);//by param set len
return mb_substr($this->getText(), 0, $this->getDescriptionLen(),$this->charset);//shrink X chars
}
function getKeyWords($mKw=null){//from the given text
$this->setMaxKeywords($mKw);//by param max keywords
$text = $this->getText();
$text = str_replace (array('–','(',')','+',':','.','?','!','_','*','-'), '', $text);//replace not valid character
$text = str_replace (array(' ','.'), ',', $text);//replace for comas
//erase minor words, banned words and count
$wordCounter=array();//array to keep word->number of repetitions
$arrText=explode(',',$text);
unset($text);
foreach ($arrText as $value) {
$value=trim($value);//bye spaces
if ( strlen($value)>=$this->getMinWordLen() && !in_array($value,$this->getBannedWords()) ) {//no smaller than X and not in banned
//I can count how many time we ad and update the record in an array
if (array_key_exists($value,$wordCounter)){//if the key exists we ad 1 more
$wordCounter[$value]=$wordCounter[$value]+1;
}
else $wordCounter[$value]=1;//creating the key
}
}
unset($arrText);
uasort($wordCounter,array($this,'cmp'));//sort from bigger to smaller
$i=1;//start countg how many keywords
$keywords='';
foreach($wordCounter as $key=>$value){
$keywords.=$key.', ';
if ($i<$this->getMaxKeywords()) $i++;//to control the limit of keywords to display
else break;//we did all of them! bye!
}
unset($wordCounter);
$keywords=substr($keywords,0,-2);//erase last coma
return $keywords;
}
//config params:
/////////$text
function setText($text){
$text = html_entity_decode($text,ENT_QUOTES,$this->charset);
$text = strip_tags($text);//erases any html markup
$text = preg_replace('/\s\s+/', ' ', $text);//erase possible duplicated white spaces
$text = str_replace (array('\r\n', '\n', '+'), ',', $text);//replace possible returns
$text = trim($text);
$text = mb_strtolower($text,$this->charset);//everything to lower case
$this-> text=$text;//set text
}
function getText(){
return $this->text;
}
/////////////$maxDescriptionLen
function setDescriptionLen($len){
if (is_numeric($len)) $this->maxDescriptionLen=$len;
}
function getDescriptionLen(){
return $this->maxDescriptionLen;
}
//////////////maxKeywords
function setMaxKeywords($len){
if (is_numeric($len)) $this->maxKeywords=$len;
}
function getMaxKeywords(){
return $this->maxKeywords;
}
////////////minWordLen
function setMinWordLen($len){
if (is_numeric($len)) $this->minWordLen=$len;
}
function getMinWordLen(){
return $this->minWordLen;
}
////////////bannedWords
function setBannedWords($words){
if (isset($words)){
$arrText=explode(',',$words);
if (is_array($arrText)) $this->bannedWords=$arrText;
}
}
function getBannedWords(){
return $this->bannedWords;
}
//end config params
//function tools:
private function countWordArray($search,$array){//count the $search word in the given array
if (is_array($array) && $search!=''){
$count=0;
foreach ($array as $e) if ($e==$search) $count++;
return $count;
}
else return false;
}
private function cmp($a, $b) {//sort for uasort descendent numbers
if ($a == $b) return 0;
return ($a < $b) ? 1 : -1;
}
//end function tools
}
//end phpSEO class
?>
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