function coauthors__echo($tag, $type = 'tag', $separators = array(), $tag_args = null, $echo = true)
{
// Define the standard output separator. Constant support is for backwards compat.
// @see https://github.com/danielbachhuber/Co-Authors-Plus/issues/12
$default_before = defined('COAUTHORS_DEFAULT_BEFORE') ? COAUTHORS_DEFAULT_BEFORE : '';
$default_between = defined('COAUTHORS_DEFAULT_BETWEEN') ? COAUTHORS_DEFAULT_BETWEEN : ', ';
$default_between_last = defined('COAUTHORS_DEFAULT_BETWEEN_LAST') ? COAUTHORS_DEFAULT_BETWEEN_LAST : __(' and ', 'co-authors-plus');
$default_after = defined('COAUTHORS_DEFAULT_AFTER') ? COAUTHORS_DEFAULT_AFTER : '';
if (!isset($separators['before']) || $separators['before'] === NULL) {
$separators['before'] = apply_filters('coauthors_default_before', $default_before);
}
if (!isset($separators['between']) || $separators['between'] === NULL) {
$separators['between'] = apply_filters('coauthors_default_between', $default_between);
}
if (!isset($separators['betweenLast']) || $separators['betweenLast'] === NULL) {
$separators['betweenLast'] = apply_filters('coauthors_default_between_last', $default_between_last);
}
if (!isset($separators['after']) || $separators['after'] === NULL) {
$separators['after'] = apply_filters('coauthors_default_after', $default_after);
}
$output = '';
$i = new CoAuthorsIterator();
$output .= $separators['before'];
$i->iterate();
do {
$author_text = '';
if ($type == 'tag') {
$author_text = $tag($tag_args);
} elseif ($type == 'field' && isset($i->current_author->{$tag})) {
$author_text = $i->current_author->{$tag};
} elseif ($type == 'callback' && is_callable($tag)) {
$author_text = call_user_func($tag, $i->current_author);
}
// Fallback to user_login if we get something empty
if (empty($author_text)) {
$author_text = $i->current_author->user_login;
}
// Append separators
if (!$i->is_first() && $i->count() > 2) {
$output .= $separators['between'];
}
if ($i->is_last() && $i->count() > 1) {
$output = rtrim($output, $separators['between']);
$output .= $separators['betweenLast'];
}
$output .= $author_text;
} while ($i->iterate());
$output .= $separators['after'];
if ($echo) {
echo $output;
}
return $output;
}
