Code
php-class-keyword-density-check
PHP Class keywordDensityChecker v1.1.1
Simple yet powerfull PHP class to calculate a websites keyword density.
EXAMPLE:
```
$obj = new KD(); // New instance $obj->domain = 'http://code.eyecatch-up.de'; // Define Domain print_r ($obj->result()); ?> ```
EXAMPLE ABOVE RETURNS
``` Array ( [0] => Array ( [total words] => 231 )
[1] => Array
(
[keyword] => display
[count] => 14
[percent] => 6.06
)
[2] => Array
(
[keyword] => echo
[count] => 12
[percent] => 5.19
)
[3] => Array
(
[keyword] => stats
[count] => 7
[percent] => 3.03
)
and so on.. ```
THE CLASS
```
Simple yet powerfull PHP class to get the keyword density of a website.
by Stephan Schmitz, info@eyecatch-up.de
Latest version, features, manual and examples: http://code.eyecatch-up.de/?p=155
LICENSE
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License (GPL) as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
To read the license please visit http://www.gnu.org/copyleft/gpl.html ====================================================================== */
/**
* KeywordDensityChecker
* Simple yet powerfull PHP class to get the keyword density of
* a website.
*/
class KD {
// -------------------------------------------------------------------
// @params
// -------------------------------------------------------------------
var $domain; // Domain to check
// -------------------------------------------------------------------
// PRIVATE FUNCTIONS
// -------------------------------------------------------------------
// -------------------------------------------------------------------
// Private Function cURL
// -------------------------------------------------------------------
private function cURL(){
// -------------------------------------------------------------------
// Save result page to string using curl
// -------------------------------------------------------------------
$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,$this->domain);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,5);
$str = curl_exec($ch);
return $str;
} // End of private function cURL
// -------------------------------------------------------------------
// Private Function to return result page as string
// -------------------------------------------------------------------
private function plainText(){
// -------------------------------------------------------------------
// External classes
// -------------------------------------------------------------------
require_once('ext/class.html2text.inc');
// -------------------------------------------------------------------
// Save google result page to string using curl
// -------------------------------------------------------------------
$str = $this->cURL();
// -------------------------------------------------------------------
// Extract the plain text
// -------------------------------------------------------------------
$extraction =& new html2text($str, true);
$extraction->set_base_url($this->domain);
// -------------------------------------------------------------------
// Return string
// -------------------------------------------------------------------
return strtolower($extraction->get_text());
} // End of private function plainText
// -------------------------------------------------------------------
// Private Function to clean out the plain text
// -------------------------------------------------------------------
private function trim_replace($string) {
$string = trim($string);
return (string)str_replace(array("\r", "\r\n", "\n"), '', $string);
}
// -------------------------------------------------------------------
// Private Function to calculate the keyword density from plain text
// -------------------------------------------------------------------
private function calcDensity(){
// -------------------------------------------------------------------
// Prepare string
// -------------------------------------------------------------------
$words = explode(" ",$this->plainText());
$common_words = "i,he,she,it,and,me,my,you,the";
$common_words = strtolower($common_words);
$common_words = explode(",", $common_words);
// -------------------------------------------------------------------
// Get keywords
// -------------------------------------------------------------------
$words_sum = 0;
foreach ($words as $value){
$common = false;
$value = $this->trim_replace($value);
if (strlen($value) > 3){
foreach ($common_words as $common_word){
if ($common_word == $value){
$common = true;
}
}
if ($common != true){
if (!preg_match("/http/i", $value) && !preg_match("/mailto:/i", $value)) {
$keywords[] = $value;
$words_sum++;
}
}
}
}
// -------------------------------------------------------------------
// Do some maths and write array
// -------------------------------------------------------------------
$keywords = array_count_values($keywords);
arsort($keywords);
$results = array();
$results []= array(
'total words' => $words_sum
);
foreach ($keywords as $key => $value){
$percent = 100 / $words_sum * $value;
$results []= array(
'keyword' => trim($key),
'count' => $value,
'percent' => round($percent, 2)
);
}
// -------------------------------------------------------------------
// Return array
// -------------------------------------------------------------------
return $results;
} // End of private function calcDensity
// -------------------------------------------------------------------
// PUBLIC FUNCTION
// -------------------------------------------------------------------
// -------------------------------------------------------------------
// Public Function to return the keyword density result array
// -------------------------------------------------------------------
public function result(){
return $this->calcDensity();
} // End of function KD
} // End of class KeywordDensityChecker v1.1.1 by Stephan Schmitz @ http://code.eyecatch-up.de/?p=155
?>
```