************* HELP TEXT RELATED ************************** */
/**
* Create a variable help text table.
*
* @param string $type Either 'basic' or 'advanced'.
*
* @return string Help text table.
*/
private static function create_variable_help_table( $type ) {
if ( ! in_array( $type, array( 'basic', 'advanced' ), true ) ) {
return '';
}
$table = '
';
return $table;
}
/**
* Create the help text table for the basic variables for use in a help tab.
*
* @return string
*/
public static function get_basic_help_texts() {
return self::create_variable_help_table( 'basic' );
}
/**
* Create the help text table for the advanced variables for use in a help tab.
*
* @return string
*/
public static function get_advanced_help_texts() {
return self::create_variable_help_table( 'advanced' );
}
/**
* Set the help text for a user/plugin/theme defined extra variable.
*
* @param string $type Type of variable: 'basic' or 'advanced'.
* @param WPSEO_Replacement_Variable $replacement_variable The replacement variable to register.
*/
private static function register_help_text( $type, WPSEO_Replacement_Variable $replacement_variable ) {
$identifier = $replacement_variable->get_variable();
if ( ( is_string( $type ) && in_array( $type, array( 'basic', 'advanced' ), true ) )
&& ( $identifier !== '' && ! isset( self::$help_texts[ $type ][ $identifier ] ) )
) {
self::$help_texts[ $type ][ $identifier ] = $replacement_variable;
}
}
/**
* Generates a list of replacement variables based on the help texts.
*
* @return array List of replace vars.
*/
public function get_replacement_variables_list() {
self::setup_statics_once();
$replacement_variables = array_merge(
$this->get_replacement_variables(),
WPSEO_Custom_Fields::get_custom_fields(),
WPSEO_Custom_Taxonomies::get_custom_taxonomies()
);
return array_map( array( $this, 'format_replacement_variable' ), $replacement_variables );
}
/**
* Creates a merged associative array of both the basic and advanced help texts.
*
* @return array Array with the replacement variables.
*/
private function get_replacement_variables() {
$help_texts = array_merge( self::$help_texts['basic'], self::$help_texts['advanced'] );
return array_filter( array_keys( $help_texts ), array( $this, 'is_not_prefixed' ) );
}
/**
* Checks whether the replacement variable contains a `ct_` or `cf_` prefix, because they follow different logic.
*
* @param string $replacement_variable The replacement variable.
*
* @return bool True when the replacement variable is not prefixed.
*/
private function is_not_prefixed( $replacement_variable ) {
$prefixes = array( 'cf_', 'ct_' );
$prefix = $this->get_prefix( $replacement_variable );
return ! in_array( $prefix, $prefixes, true );
}
/**
* Strip the prefix from a replacement variable name.
*
* @param string $replacement_variable The replacement variable.
*
* @return string The replacement variable name without the prefix.
*/
private function strip_prefix( $replacement_variable ) {
return substr( $replacement_variable, 3 );
}
/**
* Gets the prefix from a replacement variable name.
*
* @param string $replacement_variable The replacement variable.
*
* @return string The prefix of the replacement variable.
*/
private function get_prefix( $replacement_variable ) {
return substr( $replacement_variable, 0, 3 );
}
/**
* Strips 'desc_' if present, and appends ' description' at the end.
*
* @param string $label The replacement variable.
*
* @return string The altered replacement variable name.
*/
private function handle_description( $label ) {
if ( strpos( $label, 'desc_' ) === 0 ) {
return substr( $label, 5 ) . ' description';
}
return $label;
}
/**
* Creates a label for prefixed replacement variables that matches the format in the editors.
*
* @param string $replacement_variable The replacement variable.
*
* @return string The replacement variable label.
*/
private function get_label( $replacement_variable ) {
$prefix = $this->get_prefix( $replacement_variable );
if ( $prefix === 'cf_' ) {
return $this->strip_prefix( $replacement_variable ) . ' (custom field)';
}
if ( $prefix === 'ct_' ) {
$label = $this->strip_prefix( $replacement_variable );
$label = $this->handle_description( $label );
return ucfirst( $label . ' (custom taxonomy)' );
}
if ( $prefix === 'pt_' ) {
if ( $replacement_variable === 'pt_single' ) {
return 'Post type (singular)';
}
return 'Post type (plural)';
}
return '';
}
/**
* Formats the replacement variables.
*
* @param string $replacement_variable The replacement variable to format.
*
* @return array The formatted replacement variable.
*/
private function format_replacement_variable( $replacement_variable ) {
return array(
'name' => $replacement_variable,
'value' => '',
'label' => $this->get_label( $replacement_variable ),
);
}
/**
* Retrieves the custom field names as an array.
*
* @link WordPress core: wp-admin/includes/template.php. Reused query from it.
*
* @return array The custom fields.
*/
private function get_custom_fields() {
global $wpdb;
/**
* Filters the number of custom fields to retrieve for the drop-down
* in the Custom Fields meta box.
*
* @since 2.1.0
*
* @param int $limit Number of custom fields to retrieve. Default 30.
*/
$limit = apply_filters( 'postmeta_form_limit', 30 );
$sql = "SELECT DISTINCT meta_key
FROM $wpdb->postmeta
WHERE meta_key NOT BETWEEN '_' AND '_z'
HAVING meta_key NOT LIKE %s
ORDER BY meta_key
LIMIT %d";
$fields = $wpdb->get_col( $wpdb->prepare( $sql, $wpdb->esc_like( '_' ) . '%', $limit ) );
if ( is_array( $fields ) ) {
return array_map( array( $this, 'add_custom_field_prefix' ), $fields );
}
return array();
}
/**
* Adds the cf_ prefix to a field.
*
* @param string $field The field to prefix.
*
* @return string The prefixed field.
*/
private function add_custom_field_prefix( $field ) {
return 'cf_' . $field;
}
/**
* Gets the names of the custom taxonomies, prepends 'ct_' and 'ct_desc', and returns them in an array.
*
* @return array The custom taxonomy prefixed names.
*/
private function get_custom_taxonomies() {
$args = array(
'public' => true,
'_builtin' => false,
);
$output = 'names';
$operator = 'and';
$custom_taxonomies = get_taxonomies( $args, $output, $operator );
if ( is_array( $custom_taxonomies ) ) {
$ct_replace_vars = array();
foreach ( $custom_taxonomies as $custom_taxonomy ) {
array_push( $ct_replace_vars, 'ct_' . $custom_taxonomy, 'ct_desc_' . $custom_taxonomy );
}
return $ct_replace_vars;
}
return array();
}
/**
* Set/translate the help texts for the WPSEO standard basic variables.
*/
private static function set_basic_help_texts() {
/* translators: %s: wp_title() function. */
$separator_description = __( 'The separator defined in your theme\'s %s tag.', 'wordpress-seo' );
$separator_description = sprintf(
$separator_description,
// 'wp_title()
'
'wp_title()'
);
$replacement_variables = array(
new WPSEO_Replacement_Variable( 'date', __( 'Date', 'wordpress-seo' ), __( 'Replaced with the date of the post/page', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'title', __( 'Title', 'wordpress-seo' ), __( 'Replaced with the title of the post/page', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'parent_title', __( 'Parent title', 'wordpress-seo' ), __( 'Replaced with the title of the parent page of the current page', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'archive_title', __( 'Archive title', 'wordpress-seo' ), __( 'Replaced with the normal title for an archive generated by WordPress', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'sitename', __( 'Site title', 'wordpress-seo' ), __( 'The site\'s name', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'sitedesc', __( 'Tagline', 'wordpress-seo' ), __( 'The site\'s tagline', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'excerpt', __( 'Excerpt', 'wordpress-seo' ), __( 'Replaced with the post/page excerpt (or auto-generated if it does not exist)', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'excerpt_only', __( 'Excerpt only', 'wordpress-seo' ), __( 'Replaced with the post/page excerpt (without auto-generation)', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'tag', __( 'Tag', 'wordpress-seo' ), __( 'Replaced with the current tag/tags', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'category', __( 'Category', 'wordpress-seo' ), __( 'Replaced with the post categories (comma separated)', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'primary_category', __( 'Primary category', 'wordpress-seo' ), __( 'Replaced with the primary category of the post/page', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'category_description', __( 'Category description', 'wordpress-seo' ), __( 'Replaced with the category description', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'tag_description', __( 'Tag description', 'wordpress-seo' ), __( 'Replaced with the tag description', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'term_description', __( 'Term description', 'wordpress-seo' ), __( 'Replaced with the term description', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'term_title', __( 'Term title', 'wordpress-seo' ), __( 'Replaced with the term name', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'searchphrase', __( 'Search phrase', 'wordpress-seo' ), __( 'Replaced with the current search phrase', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'sep', __( 'Separator', 'wordpress-seo' ), $separator_description ),
);
foreach ( $replacement_variables as $replacement_variable ) {
self::register_help_text( 'basic', $replacement_variable );
}
}
/**
* Set/translate the help texts for the WPSEO standard advanced variables.
*/
private static function set_advanced_help_texts() {
$replacement_variables = array(
new WPSEO_Replacement_Variable( 'pt_single', __( 'Post type (singular)', 'wordpress-seo' ), __( 'Replaced with the content type single label', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'pt_plural', __( 'Post type (plural)', 'wordpress-seo' ), __( 'Replaced with the content type plural label', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'modified', __( 'Modified', 'wordpress-seo' ), __( 'Replaced with the post/page modified time', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'id', __( 'ID', 'wordpress-seo' ), __( 'Replaced with the post/page ID', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'name', __( 'Name', 'wordpress-seo' ), __( 'Replaced with the post/page author\'s \'nicename\'', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'user_description', __( 'User description', 'wordpress-seo' ), __( 'Replaced with the post/page author\'s \'Biographical Info\'', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'page', __( 'Page number', 'wordpress-seo' ), __( 'Replaced with the current page number with context (i.e. page 2 of 4)', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'pagetotal', __( 'Pagetotal', 'wordpress-seo' ), __( 'Replaced with the current page total', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'pagenumber', __( 'Pagenumber', 'wordpress-seo' ), __( 'Replaced with the current page number', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'caption', __( 'Caption', 'wordpress-seo' ), __( 'Attachment caption', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'focuskw', __( 'Focus keyword', 'wordpress-seo' ), __( 'Replaced with the posts focus keyphrase', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'term404', __( 'Term404', 'wordpress-seo' ), __( 'Replaced with the slug which caused the 404', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'cf_', ' ' . __( '(custom field)', 'wordpress-seo' ), __( 'Replaced with a posts custom field value', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'ct_', ' ' . __( '(custom taxonomy)', 'wordpress-seo' ), __( 'Replaced with a posts custom taxonomies, comma separated.', 'wordpress-seo' ) ),
new WPSEO_Replacement_Variable( 'ct_desc_', ' ' . __( 'description (custom taxonomy)', 'wordpress-seo' ), __( 'Replaced with a custom taxonomies description', 'wordpress-seo' ) ),
);
foreach ( $replacement_variables as $replacement_variable ) {
self::register_help_text( 'advanced', $replacement_variable );
}
}
/* *********************** GENERAL HELPER METHODS ************************** */
/**
* Remove the '%%' delimiters from a variable string.
*
* @param string $string Variable string to be cleaned.
*
* @return string
*/
private static function remove_var_delimiter( $string ) {
return trim( $string, '%' );
}
/**
* Add the '%%' delimiters to a variable string.
*
* @param string $string Variable string to be delimited.
*
* @return string
*/
private static function add_var_delimiter( $string ) {
return '%%' . $string . '%%';
}
/**
* Retrieve a post's terms, comma delimited.
*
* @param int $id ID of the post to get the terms for.
* @param string $taxonomy The taxonomy to get the terms for this post from.
* @param bool $return_single If true, return the first term.
*
* @return string Either a single term or a comma delimited string of terms.
*/
public function get_terms( $id, $taxonomy, $return_single = false ) {
$output = '';
// If we're on a specific tag, category or taxonomy page, use that.
if ( is_category() || is_tag() || is_tax() ) {
$term = $GLOBALS['wp_query']->get_queried_object();
$output = $term->name;
}
elseif ( ! empty( $id ) && ! empty( $taxonomy ) ) {
$terms = get_the_terms( $id, $taxonomy );
if ( is_array( $terms ) && $terms !== array() ) {
foreach ( $terms as $term ) {
if ( $return_single ) {
$output = $term->name;
break;
}
else {
$output .= $term->name . ', ';
}
}
$output = rtrim( trim( $output ), ',' );
}
}
unset( $terms, $term );
/**
* Allows filtering of the terms list used to replace %%category%%, %%tag%% and %%ct_%% variables.
*
* @api string $output Comma-delimited string containing the terms.
* @api string $taxonomy The taxonomy of the terms.
*/
return apply_filters( 'wpseo_terms', $output, $taxonomy );
}
} /* End of class WPSEO_Replace_Vars */