Estimate keyword density for a given block of text

Question

I would like to use php to pass a keyword phrase to a function and to parse a block of text and return the keyword density of the input phrase as a percentage of the total number of words in the text block.

Answer 1

$text = 'lorem ipsum etc';
$keyword = 'lorem ipsum';

$word_count = explode(' ', $text);
$word_count = count($word_count);

$keyword_count = preg_match_all("#{$keyword}#si", $text, $matches);
$keyword_count = count($matches);

$density = $keyword_count / $word_count * 100;

echo number_format($density, 2) . '%';

Answer 2

Take a look at:

• http://www.bitrepository.com/word-popularity-script.html

Answer 3

:

• , preg_split.
• count, .
• array_count_values .
• .

, , .

Answer 4

Departure:

• PHP Keyword Density N-gram Analysis Algorithm