Your IP : 3.16.135.228
<?php
function zem_rp_update_tags($post_id) {
global $wpdb;
$post = get_post($post_id);
if ($post->post_parent) { // Handling revisions
$post = get_post($post->post_parent);
}
$wpdb->query(
$wpdb->prepare('DELETE from ' . $wpdb->prefix . 'zem_rp_tags WHERE post_id=%d', $post->ID)
);
if ($post->post_type !== 'post' || $post->post_status !== 'publish') {
return;
}
zem_rp_generate_tags($post);
}
add_action('save_post', 'zem_rp_update_tags');
function zem_rp_get_exclude_ids_list_string($exclude_ids = array()) {
global $post;
array_push($exclude_ids, $post->ID);
$exclude_ids = array_map('intval', $exclude_ids);
$exclude_ids_str = implode(', ', $exclude_ids);
return $exclude_ids_str;
}
global $zem_rp_unigrams;
function zem_rp_get_unigrams() {
global $zem_rp_unigrams;
if ($zem_rp_unigrams) {
return $zem_rp_unigrams;
}
$zem_rp_unigrams = array();
$unigrams_file = dirname(__FILE__) . '/lib/unigrams.csv';
$handle = fopen($unigrams_file, 'r');
while (($data = fgets($handle, 50)) !== FALSE) {
$un = explode("\t", $data);
if (count($un) == 5) {
$zem_rp_unigrams[$un[0]] = floatval($un[4]);
}
}
fclose($handle);
return $zem_rp_unigrams;
}
function zem_rp_generate_auto_tags($post) {
$suitable_words = zem_rp_get_unigrams();
$words = array_slice(array_merge(explode(' ', $post->post_title), explode(' ', $post->post_content)), 0, ZEM_RP_RECOMMENDATIONS_AUTO_TAGS_MAX_WORDS);
$bag_of_words = array();
foreach ($words as $word) {
$word = strtolower($word);
$word = preg_replace('/[\W_]+/', '', $word);
$stem = ZemPorterStemmer::Stem($word);
if ($stem) {
if (!isset($bag_of_words[$stem])) {
$bag_of_words[$stem] = 1;
} else {
$bag_of_words[$stem] += 1;
}
}
}
$selected_words = array();
foreach ($bag_of_words as $word => $freq) {
if (isset($suitable_words[$word])) {
$selected_words[$word] = $suitable_words[$word] * sqrt($freq);
}
}
asort($selected_words);
$selected_words = array_reverse($selected_words, true);
$auto_tags = array_slice($selected_words, 0, ZEM_RP_RECOMMENDATIONS_AUTO_TAGS_MAX_TAGS, true);
return array_keys($auto_tags);
}
function zem_rp_get_post_term_tags($post, $term, $skip=array()) {
$tags = wp_get_post_terms($post->ID, $term);
$skip = array_flip($skip);
$selected_tags = array();
foreach ($tags as $tag) {
if (!isset($skip[$tag->name])) {
array_push($selected_tags, $tag->name);
}
}
return $selected_tags;
}
function zem_rp_generate_tags($post) {
global $wpdb;
$tag_groups = array(
'tags' => array(
'labels' => zem_rp_get_post_term_tags($post, 'post_tag'),
'weight' => ZEM_RP_RECOMMENDATIONS_TAGS_SCORE,
'prefix' => 'P_',
),
'categories' => array(
'labels' => zem_rp_get_post_term_tags($post, 'category', array('Uncategorized')),
'weight' => ZEM_RP_RECOMMENDATIONS_CATEGORIES_SCORE,
'prefix' => 'C_',
),
'auto_tags' => array(
'labels' => zem_rp_generate_auto_tags($post),
'weight' => ZEM_RP_RECOMMENDATIONS_AUTO_TAGS_SCORE,
'prefix' => 'A_',
)
);
$all_tags = array();
$sql_tag_values = array();
foreach ($tag_groups as $type => $tag_obj) {
$weight = $tag_obj['weight'];
foreach ($tag_obj['labels'] as $label) {
$label = $tag_obj['prefix'] . strtolower($label);
$label = substr($label, 0, ZEM_RP_MAX_LABEL_LENGTH);
array_push($all_tags, $label);
array_push($sql_tag_values, $post->ID);
array_push($sql_tag_values, $post->post_date);
array_push($sql_tag_values, $label);
array_push($sql_tag_values, $weight);
}
}
if (count($all_tags) > 0 && $post->post_status == 'publish') {
$sql_tag_format_line = '(%d, %s, %s, %f)';
$tags_insert_query = $wpdb->prepare('INSERT INTO ' . $wpdb->prefix . 'zem_rp_tags (post_id, post_date, label, weight)
VALUES ' . implode(', ', array_fill(0, count($all_tags), $sql_tag_format_line)) . ';',
$sql_tag_values);
$wpdb->query($tags_insert_query);
}
return $all_tags;
}
function zem_rp_fetch_related_posts_v2($limit = 10, $exclude_ids = array()) {
global $wpdb, $post;
$related_post_ids = null;
$options = zem_rp_get_options();
$exclude_ids_str = zem_rp_get_exclude_ids_list_string($exclude_ids);
$tags_query = "SELECT label FROM " . $wpdb->prefix . "zem_rp_tags WHERE post_id=$post->ID;";
$tags = $wpdb->get_col($tags_query, 0);
if (empty($tags)) {
$tags = zem_rp_generate_tags($post);
if (empty($tags)) {
return array();
}
}
if($options['exclude_categories']) {
$exclude_categories = get_categories(array('include' => $options['exclude_categories']));
$exclude_categories_labels = array_map(create_function('$c', 'return "C_" . $c->name;'), $exclude_categories);
} else {
$exclude_categories_labels = array();
}
$total_number_of_posts = $wpdb->get_col("SELECT count(distinct(post_id)) FROM " . $wpdb->prefix . "zem_rp_tags;", 0);
$total_number_of_posts = $wpdb->get_col("SELECT count(post_id) from (SELECT post_id FROM " . $wpdb->prefix . "zem_rp_tags group by post_id) t;", 0);
if (empty($total_number_of_posts)) {
return array();
}
$total_number_of_posts = $total_number_of_posts[0];
$post_id_query = $wpdb->prepare("
SELECT
target.post_id, sum(target.weight * log(%d / least(%d, freqs.freq))) as score
FROM
" . $wpdb->prefix . "zem_rp_tags as target,
(SELECT label, count(1) as freq FROM " . $wpdb->prefix . "zem_rp_tags
WHERE label IN (" . implode(', ', array_fill(0, count($tags), "%s")) . ")
GROUP BY label
) as freqs
WHERE
target.post_id NOT IN (%s) AND
" . ($options['max_related_post_age_in_days'] > 0 ? "target.post_date > DATE_SUB(CURDATE(), INTERVAL %s DAY) AND" : "") . "
target.label=freqs.label AND
target.label IN (" . implode(', ', array_fill(0, count($tags), "%s")) . ")" .
(empty($exclude_categories_labels) ? "" : " AND
target.post_id NOT IN (
SELECT post_id FROM " . $wpdb->prefix . "zem_rp_tags
WHERE label IN (" . implode(', ', array_fill(0, count($exclude_categories_labels), "%s")) . ")
)") . "
GROUP BY target.post_id
ORDER BY score desc, target.post_id desc
LIMIT %d;",
array_merge(
array($total_number_of_posts, $total_number_of_posts),
$tags,
array($exclude_ids_str),
$options['max_related_post_age_in_days'] > 0 ? array($options['max_related_post_age_in_days']) : array(),
$tags,
$exclude_categories_labels,
array($limit * 2)
)
); // limit * 2 just in case
$related_posts_with_score = $wpdb->get_results($post_id_query, 0);
if (empty($related_posts_with_score)) {
return array();
}
$related_posts_with_score_map = array();
foreach ($related_posts_with_score as $rp) {
$related_posts_with_score_map[$rp->post_id] = $rp->score;
}
$related_post_ids = array_keys($related_posts_with_score_map);
$now = current_time('mysql', 1);
$post_query = $wpdb->prepare("
SELECT post.ID, post.post_title, post.post_excerpt, post.post_content, post.post_date, post.comment_count
FROM $wpdb->posts as post
WHERE post.ID IN (" . implode(', ', array_fill(0, count($related_post_ids), '%d')) . ")
AND post.post_type = 'post'
AND post.post_status = 'publish'
AND post.post_date_gmt < %s",
array_merge($related_post_ids, array($now)));
$related_posts = $wpdb->get_results($post_query);
foreach ($related_posts as $rp) {
$rp->zem_rp_score = $related_posts_with_score_map[$rp->ID];
}
usort($related_posts, create_function('$a,$b', 'return $b->zem_rp_score < $a->zem_rp_score ? -1 : 1;'));
$related_posts = array_slice($related_posts, 0, $limit);
return $related_posts;
}
function zem_rp_fetch_related_posts($limit = 10, $exclude_ids = array()) {
global $wpdb, $post;
$options = zem_rp_get_options();
$exclude_ids_str = zem_rp_get_exclude_ids_list_string($exclude_ids);
if(!$post->ID){return;}
$now = current_time('mysql', 1);
$tags = wp_get_post_tags($post->ID);
$tagcount = count($tags);
$taglist = false;
if ($tagcount > 0) {
$taglist = "'" . $tags[0]->term_id. "'";
for ($i = 1; $i < $tagcount; $i++) {
$taglist = $taglist . ", '" . $tags[$i]->term_id . "'";
}
}
$related_posts = false;
if ($taglist) {
$q = "SELECT p.ID, p.post_title, p.post_content,p.post_excerpt, p.post_date, p.comment_count, count(t_r.object_id) as cnt
FROM $wpdb->term_taxonomy t_t, $wpdb->term_relationships t_r, $wpdb->posts p
WHERE t_t.taxonomy ='post_tag'
AND t_t.term_taxonomy_id = t_r.term_taxonomy_id
AND t_r.object_id = p.ID
AND (t_t.term_id IN ($taglist))
AND p.ID NOT IN ($exclude_ids_str)
AND " . (!$options['exclude_categories'] ? "" : "p.ID NOT IN (
SELECT tr.object_id FROM $wpdb->term_taxonomy tt, $wpdb->term_relationships tr
WHERE tt.taxonomy = 'category'
AND tt.term_taxonomy_id = tr.term_taxonomy_id
AND tt.term_id IN (" . $options['exclude_categories'] . "))
AND "
) .
"p.post_status = 'publish'
AND p.post_type = 'post'
AND " . ($options['max_related_post_age_in_days'] == 0 ? ""
: "p.post_date > DATE_SUB(CURDATE(), INTERVAL " . $options['max_related_post_age_in_days'] . " DAY) AND ") .
"p.post_date_gmt < '$now' GROUP BY t_r.object_id
ORDER BY cnt DESC, p.post_date_gmt DESC LIMIT $limit;";
$related_posts = $wpdb->get_results($q);
}
return $related_posts;
}
function zem_rp_fetch_random_posts($limit = 10, $exclude_ids = array()) {
global $wpdb, $post;
$options = zem_rp_get_options();
$exclude_ids_str = zem_rp_get_exclude_ids_list_string($exclude_ids);
$q1 = "SELECT ID FROM $wpdb->posts posts WHERE post_status = 'publish' AND post_type = 'post' AND ID NOT IN ($exclude_ids_str)";
if($options['exclude_categories']) {
$q1 .= " AND ID NOT IN (SELECT tr.object_id FROM $wpdb->term_taxonomy tt, $wpdb->term_relationships tr WHERE tt.taxonomy = 'category' AND tt.term_taxonomy_id = tr.term_taxonomy_id AND tt.term_id IN (" . $options['exclude_categories'] . "))";
}
if($options['max_related_post_age_in_days'] > 0) {
$q1 .= " AND post_date > DATE_SUB(CURDATE(), INTERVAL " . $options['max_related_post_age_in_days'] . " DAY)";
}
$ids = $wpdb->get_col($q1, 0);
$count = count($ids);
if($count === 0) {
return false;
/*} else if($count === 1) {
$rnd = $ids;*/
} else if($count > 1) {
$display_number = min($limit, $count);
$next_seed = rand();
$t = time();
$seed = $t - $t % 300 + $post->ID << 4; // We keep the same seed for 5 minutes, so MySQL can cache the `q2` query.
srand($seed);
shuffle($ids);
$ids = array_slice($ids, 0, $display_number);
srand($next_seed);
}
$q2 = "SELECT ID, post_title, post_content, post_excerpt, post_date, comment_count FROM $wpdb->posts WHERE post_status = 'publish' AND post_type = 'post' AND ID IN (" . implode(',', $ids) . ")";
$results = $wpdb->get_results($q2);
asort($ids);
$ids_keys = array_keys($ids);
array_multisort($ids_keys, $results);
return $results;
}
function zem_rp_get_post_categories() {
global $wpdb;
$post_query = "SELECT p.ID as pid, te.name as cat_name, te.term_id as cat_id
FROM $wpdb->posts p, $wpdb->terms te, $wpdb->term_taxonomy tt, $wpdb->term_relationships tr
WHERE p.post_status = 'publish' AND p.post_type = 'post'
AND tt.taxonomy='category' AND tt.term_id = te.term_id
AND tr.object_id = p.ID AND tt.term_taxonomy_id = tr.term_taxonomy_id";
$posts = $wpdb->get_results($post_query);
$result = array();
foreach($posts as $row) {
if (!isset($result[$row->pid])) {
$result[$row->pid] = array();
}
$result[$row->pid][$row->cat_id] = $row->cat_name;
}
return $result;
}