我正在尝试使用add\\u filter更新我的一个插件函数，最终目标是更改插件输出的元素的顺序。
以下是插件功能：
public function stores_single_content($content)
{
global $post;
if(!isset($post->post_type)) {
return $content;
}
if ($post->post_type == \'stores\') {
$prefix = "wordpress_store_locator_";
$meta = get_post_meta($post->ID);
$args = array(\'fields\' => \'names\', \'orderby\' => \'name\', \'order\' => \'ASC\');
// Categories
$store_cats = wp_get_object_terms($post->ID, \'store_category\', $args);
$categories = \'<div class="store_locator_single_categories">\';
$categories .= \'<strong class="store_locator_single_categories_title">\' . __(\'Categories: \', \'wordpress-store-locator\') . \'</strong>\' . implode(\', \', $store_cats);
$categories .= \'</div>\';
$store_filter = wp_get_object_terms($post->ID, \'store_filter\', $args);
$filter = \'<div class="store_locator_single_filter">\';
$filter .= \'<strong class="store_locator_single_filter_title">\' . __(\'Filter: \', \'wordpress-store-locator\') . \'</strong>\' . implode(\', \', $store_filter);
$filter .= \'</div>\';
$address1 = isset($meta[ $prefix . \'address1\' ][0]) ? $meta[ $prefix . \'address1\' ][0] : \'\';
$address2 = isset($meta[ $prefix . \'address2\' ][0]) ? $meta[ $prefix . \'address2\' ][0] : \'\';
$zip = isset($meta[ $prefix . \'zip\' ][0]) ? $meta[ $prefix . \'zip\' ][0] : \'\';
$city = isset($meta[ $prefix . \'city\' ][0]) ? $meta[ $prefix . \'city\' ][0] : \'\';
$region = isset($meta[ $prefix . \'region\' ][0]) ? $meta[ $prefix . \'region\' ][0] : \'\';
$country = isset($meta[ $prefix . \'country\' ][0]) ? $meta[ $prefix . \'country\' ][0] : \'\';
$telephone = isset($meta[ $prefix . \'telephone\' ][0]) ? $meta[ $prefix . \'telephone\' ][0] : \'\';
$mobile = isset($meta[ $prefix . \'mobile\' ][0]) ? $meta[ $prefix . \'mobile\' ][0] : \'\';
$fax = isset($meta[ $prefix . \'fax\' ][0]) ? $meta[ $prefix . \'fax\' ][0] : \'\';
$email = isset($meta[ $prefix . \'email\' ][0]) ? $meta[ $prefix . \'email\' ][0] : \'\';
$website = isset($meta[ $prefix . \'website\' ][0]) ? $meta[ $prefix . \'website\' ][0] : \'\';
$description = "";
if($this->get_option(\'showAddressStyle\') == "american") {
$address = \'<div class="store_locator_single_address">\';
$address .= \'<h2>\' . __(\'Address \', \'wordpress-store-locator\') . \'</h2>\';
$address .= !empty($address1) ? $address1 . \'<br/>\' : \'\';
$address .= !empty($address2) ? $address2 . \'<br/>\' : \'\';
$address .= !empty($city) ? $city . \', \' : \'\';
$address .= !empty($region) ? $region . \' \' : \'\';
$address .= !empty($zip) ? $zip . \'<br/>\' : \'\';
if($this->get_option(\'showCountry\')) {
$address .= !empty($country) ? $country : \'\';
}
$address .= \'</div>\';
} else {
$address = \'<div class="store_locator_single_address">\';
$address .= \'<h2>\' . __(\'Address \', \'wordpress-store-locator\') . \'</h2>\';
$address .= !empty($address1) ? $address1 . \'<br/>\' : \'\';
$address .= !empty($address2) ? $address2 . \'<br/>\' : \'\';
$address .= !empty($zip) ? $zip . \', \' : \'\';
$address .= !empty($city) ? $city . \', \' : \'\';
$address .= !empty($region) ? $region . \', \' : \'\';
if($this->get_option(\'showCountry\')) {
$address .= !empty($country) ? $country : \'\';
}
$address .= \'</div>\';
}
$contact = \'<div class="store_locator_single_contact">\';
$contact .= \'<h2>\' . __(\'Contact \', \'wordpress-store-locator\') . \'</h2>\';
$contact .= !empty($telephone) && $this->get_option(\'showTelephone\') ?
$this->get_option(\'showTelephoneText\') . \': <a href="tel:\' . $telephone . \'">\' . $telephone . \'</a><br/>\' : \'\';
$contact .= !empty($mobile) && $this->get_option(\'showMobile\') ?
$this->get_option(\'showMobileText\') . \': <a href="tel:\' . $mobile . \'">\' . $mobile . \'</a><br/>\' : \'\';
$contact .= !empty($fax) && $this->get_option(\'showFax\') ?
$this->get_option(\'showFaxText\') . \': <a href="tel:\' . $fax . \'">\' . $fax . \'</a><br/>\' : \'\';
$contact .= !empty($email) && $this->get_option(\'showEmail\') ?
$this->get_option(\'showEmailText\') . \': <a href="mailto:\' . $email . \'">\' . $email . \'</a><br/>\' : \'\';
$contact .= !empty($website) && $this->get_option(\'showWebsite\') ?
$this->get_option(\'showWebsiteText\') . \': <a href="\' . $website . \'" target="_blank">\' . $website . \'</a><br/>\' : \'\';
$contact .= \'</div>
<div class="store_locator_single_clear"></div>\';
$map = "";
$opening_hours = "";
$opening_hours2 = "";
$contactStore = "";
if(is_single()) {
$weekdays = array(
\'Monday\' => __(\'Monday\', \'wordpress-store-locator\'),
\'Tuesday\' => __(\'Tuesday\', \'wordpress-store-locator\'),
\'Wednesday\' => __(\'Wednesday\', \'wordpress-store-locator\'),
\'Thursday\' => __(\'Thursday\', \'wordpress-store-locator\'),
\'Friday\' => __(\'Friday\', \'wordpress-store-locator\'),
\'Saturday\' => __(\'Saturday\', \'wordpress-store-locator\'),
\'Sunday\' => __(\'Sunday\', \'wordpress-store-locator\'),
);
foreach ($weekdays as $key => $weekday) {
$open = isset($meta[ $prefix . $key . "_open"]) ? $meta[ $prefix . $key . "_open"][0] : \'\';
$close = isset($meta[ $prefix . $key . "_close"]) ? $meta[ $prefix . $key . "_close"][0] : \'\';
if(!empty($open) && !empty($close)) {
$opening_hours .= $weekday . \': \' . $open . \' – \' . $close . \' \' . $this->get_option(\'showOpeningHoursClock\') . \'<br/>\';
} elseif(!empty($open)) {
$opening_hours .= $weekday . \': \' . $open . \' \' . $this->get_option(\'showOpeningHoursClock\') . \'<br/>\';
} elseif(!empty($close)) {
$opening_hours .= $weekday . \': \' . $close . \' \' . $this->get_option(\'showOpeningHoursClock\') . \'<br/>\';
}
}
if(!empty($opening_hours)) {
$opening_hours = \'<div class="store_locator_single_opening_hours">\' .
\'<h2>\' . __(\'Opening Hours \', \'wordpress-store-locator\') . \'</h2>\' .
$opening_hours .
\'</div>\';
}
foreach ($weekdays as $key => $weekday) {
$open = isset($meta[ $prefix . $key . "_open2"]) ? $meta[ $prefix . $key . "_open2"][0] : \'\';
$close = isset($meta[ $prefix . $key . "_close2"]) ? $meta[ $prefix . $key . "_close2"][0] : \'\';
if(!empty($open) && !empty($close)) {
$opening_hours2 .= $weekday . \': \' . $open . \' – \' . $close . \' \' . $this->get_option(\'showOpeningHours2Clock\') . \'<br/>\';
} elseif(!empty($open)) {
$opening_hours2 .= $weekday . \': \' . $open . \' \' . $this->get_option(\'showOpeningHours2Clock\') . \'<br/>\';
} elseif(!empty($close)) {
$opening_hours2 .= $weekday . \': \' . $close . \' \' . $this->get_option(\'showOpeningHours2Clock\') . \'<br/>\';
}
}
if(!empty($opening_hours2)) {
$opening_hours2 = \'<div class="store_locator_single_opening_hours2">\' .
\'<h2>\' . $this->get_option(\'showOpeningHours2Text\') . \'</h2>\' .
$opening_hours2 .
\'</div>\';
}
if($this->get_option(\'showContactStore\')) {
$contactStorePage = $this->get_option(\'showContactStorePage\');
$contactStoreText = $this->get_option(\'showContactStoreText\');
if(!empty($contactStorePage)) {
$contactStorePage = get_permalink($contactStorePage) . \'?store_id=\' . $post->ID;
}
$contactStore = \'<div class="store_locator_single_contact_store">\' .
\'<a href="\' . $contactStorePage . \'" class="store_locator_contact_store_button btn button et_pb_button btn-primary theme-button btn-lg center">\' . $contactStoreText . \'</a>\'.
\'</div>\';
}
$map .= \'<div id="store_locator_single_map" class="store_locator_single_map"
data-lat="\' . $meta[ $prefix . \'lat\' ][0] . \'"
data-lng="\' . $meta[ $prefix . \'lng\' ][0] . \'"></div>\';
}
$content = $categories . $filter . $content . $address . $contact . $opening_hours . $opening_hours2 . $contactStore . $map;
}
return $content;
}
还有我为函数编写的add\\u过滤器。php：
function modify_store_output() {
$content = $contact . $address . $filter . $map . $content;
return $content;
}
add_filter (\'stores_single_content\', \'modify_store_output\', 15);
试图理解为什么这不起作用：(
