public function cache_stats($id = null)
{
if (!$id) {
global $post;
if (!$post->ID) {
return null;
}
$id = $post->ID;
}
$the_post = get_post($id);
if (strlen($the_post->post_content) !== 0) {
$no_shortcodes = strip_shortcodes($the_post->post_content);
$charset = get_bloginfo('charset');
$all_text = bst_strip_html($no_shortcodes, $charset);
if ($all_text) {
$stats = bst_split_text($all_text);
$total_alphanumeric = mb_strlen($stats['alphanumeric']);
# mb_strlen = multibyte strlen
$total_sentences = count($stats['sentences']);
$total_words = count($stats['words']);
$word_array = $stats['words'];
$all_text = $stats['text'];
if ($total_words > 0 && $total_sentences > 0) {
# No divisions by zero, thanks.
$chars_per_word = intval($total_alphanumeric / $total_words);
$chars_per_sentence = intval($total_alphanumeric / $total_sentences);
$words_per_sentence = intval($total_words / $total_sentences);
$ARI = max(round(4.71 * ($total_alphanumeric / $total_words) + 0.5 * ($total_words / $total_sentences) - 21.43, 1), 0);
$CLI = max(round(5.88 * ($total_alphanumeric / $total_words) - 29.6 * ($total_sentences / $total_words) - 15.8, 1), 0);
$LIXlongwords = 0;
for ($i = 0; $i < count($word_array); $i = $i + 1) {
if (mb_strlen($word_array[$i]) > 6) {
$LIXlongwords++;
}
}
$temp = preg_split('/[,;\\.\\(\\:]/', $all_text);
$LIX = max(round($total_words / count($temp) + $LIXlongwords * 100 / $total_words, 1), 0);
} else {
$ARI = $CLI = $LIX = '0';
}
} else {
$ARI = $CLI = $LIX = '0';
}
# Remove ignored keywords
$ignore = Word_Stats_Core::get_ignored_keywords();
$keywords = bst_regfilter_keyword_counts(bst_keywords($the_post->post_content, 3, get_bloginfo('charset')), $ignore);
} else {
$ARI = 0;
$CLI = 0;
$LIX = 0;
$total_words = 0;
$keywords = array();
}
# Cache the stats
update_post_meta($id, 'readability_ARI', $ARI);
update_post_meta($id, 'readability_CLI', $CLI);
update_post_meta($id, 'readability_LIX', $LIX);
update_post_meta($id, 'word_stats_word_count', $total_words);
update_post_meta($id, 'word_stats_keywords', serialize($keywords));
update_post_meta($id, 'word_stats_cached', true);
}
function bst_keywords($text, $minimum = 0, $charset = 'UTF-8')
{
# No funky divisions
if ($ratio < 0) {
$ratio = 0;
}
if (!$text) {
return false;
}
if (!$ignore) {
$ignore = array();
}
$text = bst_strip_html($text, $charset);
$text = bst_strip_shortcodes($text);
$word_hash = array();
$top_word_count = 0;
$stats = bst_split_text($text);
$word_array = $stats['words'];
$total_words = count($word_array);
# Count keywords
foreach ($word_array as $word) {
$word = trim(strtolower($word));
if (strlen($word) > 3) {
if (!$word_hash[$word]) {
$word_hash[$word] = 0;
}
$word_hash[$word]++;
if ($word_hash[$word] > $top_word_count) {
$top_word_count = $word_hash[$word];
}
}
}
unset($word_array);
# Not needed anymore.
$filtered_result = array();
$purged_result = array();
# We want a ratio
if ($ratio && $minimum) {
# Filter
foreach ($word_hash as $keyword => $appareances) {
if (intval($appareances / ($total_words / $ratio)) >= $minimum) {
$filtered_result[$keyword] = $appareances;
}
}
# Only minimum
} elseif (!$ratio && $minimum) {
# Filter
foreach ($word_hash as $keyword => $appareances) {
if ($appareances >= $minimum) {
$filtered_result[$keyword] = $appareances;
}
}
} else {
$filtered_result = $word_hash;
}
return $filtered_result;
}
