Da quel che sono riuscito a capire la parte di codice predisposta per la modifica dovrebbe essere quella finale, ovvero questa:
Codice PHP:
// select the post_type sql for both post pages (post_status = 'static')
// and posts (AND post_status = 'publish')
// or for just pages or for just posts (the default)
// by adding this where criteria, we also solve the problem
// of accidentally including images from draft posts.
if ($wp_version < '2.1') {
if ($post_type == "both") {
$post_type_sql = "AND (post_status = 'publish' OR post_status = 'static')";
} else if ($post_type == "pages") {
$post_type_sql = "AND post_status = 'static'";
} else {
$post_type_sql = "AND post_status = 'publish'";
}
} else {
if ($post_type == 'both') {
$post_type_sql = "AND post_status = 'publish' AND post_type in ('post', 'page')";
} elseif ($post_type == 'pages') {
$post_type_sql = "AND post_status = 'publish' AND post_type = 'page'";
} else {
$post_type_sql = "AND post_status = 'publish' AND post_type = 'post'";
}
}
// assuming $category_filter is a comma separated list of category ids,
// modify query to join with post2cat table to select from only the chosen categories
$category_filter_join = "";
$category_filter_sql = "";
$category_filter_group = "";
if ($category_filter != "") {
if ($wp_version >= '2.3') {
$category_filter_join = "LEFT JOIN $wpdb->term_relationships ON $wpdb->posts.ID = $wpdb->term_relationships.object_id LEFT JOIN $wpdb->term_taxonomy ON $wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id";
$category_filter_sql = "AND $wpdb->term_taxonomy.term_id IN ($category_filter)";
$category_filter_group = "GROUP BY $wpdb->posts.ID";
} else {
$category_filter_join = "LEFT JOIN $wpdb->post2cat ON $wpdb->posts.ID = $wpdb->post2cat.post_id";
$category_filter_sql = "AND $wpdb->post2cat.category_id IN ($category_filter)";
$category_filter_group = "GROUP BY $wpdb->posts.ID";
}
}
// by default we sort images randomly,
// but we can also sort them in descending date order
if ($sort_images_randomly) {
$order_by_sql = "rand()";
} else {
$order_by_sql = "$wpdb->posts.post_date DESC";
}
// query records that contain img tags, ordered randomly
// do not select images from password protected posts
$sql = "SELECT $wpdb->posts.ID, $wpdb->posts.post_title, $wpdb->posts.post_content, $wpdb->posts.post_excerpt
FROM $wpdb->posts
$category_filter_join
WHERE (post_content LIKE '%<img%' or post_content LIKE '%[gallery]%')
AND post_password = ''
$post_type_sql
$category_filter_sql
$category_filter_group
ORDER BY $order_by_sql";
$resultset = @mysql_query($sql, $wpdb->dbh);
if ($debugging && mysql_error($wpdb->dbh)) print "mysql errors: " . mysql_error($wpdb->dbh) . "<br/> SQL: " . htmlspecialchars($sql) . "<br/>";;
if ($debugging) print "elligible post count: " . @mysql_num_rows($resultset) . "<br/>";
// keep track of multiple images to prevent displaying dups
$image_srcs = array();
// loop through each applicable post from the database
$image_count = 0;
while ($row = mysql_fetch_array($resultset)) {
$post_title = $row['post_title'];
$post_permalink = get_permalink($row['ID']);
$post_content = $row['post_content'];
$post_excerpt = $row['post_excerpt'];
$matches = array();
// find all img tags
preg_match_all("/<img[^>]+>/i", $post_content, $matches);
if ($show_images_in_galleries) {
// find any gallery attachments
if (strpos($post_content, '[gallery]') !== false) {
$sql = "SELECT $wpdb->posts.guid, $wpdb->posts.post_excerpt
FROM $wpdb->posts
WHERE post_parent = '" . $row['ID'] . "'
AND post_type = 'attachment'
AND post_password = ''
AND post_mime_type in ('image/jpeg', 'image/gif', 'image/png')";
$resultset2 = @mysql_query($sql, $wpdb->dbh);
while ($row2 = mysql_fetch_array($resultset2)) {
$matches[0][] = "<img src='" . $row2['guid'] . "' alt='" . htmlspecialchars($row2['post_excerpt'], ENT_QUOTES) . "' />";
}
}
}
// if there are none, try again,
if (count($matches[0]) == 0) {
continue;
}
// randomize the array of images in this post
shuffle($matches[0]);
// loop through each image candidate for this post and try to find a winner
foreach ($matches[0] as $image_element) {
// grab the src attribute and see if it exists, if not try again
preg_match("/src\s*=\s*(\"|')(.*?)\\1/i", $image_element, $image_src);
$image_src = $image_src[2];
// make sure we haven't displayed this image before
if ($image_src == "" || in_array($image_src, $image_srcs)) {
continue;
}
// if a regex is supplied and it doesn't match, try next post
if ($image_src_regex != "" && !preg_match("/" . $image_src_regex . "/i", $image_src)) {
continue;
}
if ($image_class_match != "") {
// grab the class attribute and see if it exists, if not try again
preg_match("/class\s*=\s*(\"|')(.*?)\\1/i", $image_element, $image_classes);
$image_classes = $image_classes[2];
if ($image_classes == '') {
continue;
}
$image_classes = explode(" ", $image_classes);
if (!in_array($image_class_match, $image_classes)) {
continue;
}
}
// add img src to array to check for dups
$image_srcs[] = $image_src;
// grab the alt attribute and see if it exists, if not supply default
preg_match("/alt\s*=\s*(\"|')(.*?)\\1/i", $image_element, $image_alt);
$image_alt = $image_alt[2];
if ($image_alt == "") {
$image_alt = "random image";
}
$image_html = $image_template_html;
$image_html = str_replace("%1", $post_title, $image_html);
$image_html = str_replace("%2", "<a href='$post_permalink'><img src='$image_src' alt='$image_alt' $image_attributes /></a>", $image_html);
if ($image_alt == 'random image') {
$image_html = str_replace("%3", '', $image_html);
} else {
$image_html = str_replace("%3", $image_alt, $image_html);
}
$image_html = str_replace("%4", $post_excerpt, $image_html);
print $image_html;
$image_count++;
if ($image_count == $number_of_images) {
return;
} else {
// print a linebreak between each successive image
print "$inter_image_html\n";
}
// leave the foreach loop and look for images
// in other posts
// TODO: if people wanted to display multiple images per post,
// we would selectively skip this break
break;
}
}
}
?>
Purtroppo non capisco quale variabile utilizzare per fare il controllo sul formato dell'immagine (ho intenzione di visualizzare solo immagini con rapporto larghezza/altezza = a 1,5).