WordPress at a glance
filter is not described

widget_title filter-hook . WP 1.0

This filter is documented in wp-includes/widgets/class-wp-widget-pages.php

Usage

add_filter( 'widget_title', 'filter_function_name_4995', 10, 3 );
function filter_function_name_4995( $title, $instance, $id_base ){
	// filter...

	return $title;
}
$title
-
$instance
-
$id_base
-

Where the hook is called

WP_Widget_Recent_Posts::widget()
widget_title
WP_Widget_Calendar::widget()
widget_title
WP_Widget_RSS::widget()
widget_title
WP_Widget_Media::widget()
widget_title
WP_Widget_Recent_Comments::widget()
widget_title
WP_Nav_Menu_Widget::widget()
widget_title
WP_Widget_Meta::widget()
widget_title
WP_Widget_Archives::widget()
widget_title
WP_Widget_Tag_Cloud::widget()
widget_title
WP_Widget_Categories::widget()
widget_title
WP_Widget_Search::widget()
widget_title
WP_Widget_Text::widget()
widget_title
WP_Widget_Pages::widget()
widget_title
WP_Widget_Custom_HTML::widget()
widget_title
wp-includes/widgets/class-wp-widget-recent-posts.php 52
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
wp-includes/widgets/class-wp-widget-calendar.php 53
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
wp-includes/widgets/class-wp-widget-rss.php 85
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
wp-includes/widgets/class-wp-widget-media.php 235
$title = apply_filters( 'widget_title', $instance['title'], $instance, $this->id_base );
wp-includes/widgets/class-wp-widget-recent-comments.php 89
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
wp-includes/widgets/class-wp-nav-menu-widget.php 53
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
wp-includes/widgets/class-wp-widget-meta.php 49
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
wp-includes/widgets/class-wp-widget-archives.php 47
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
wp-includes/widgets/class-wp-widget-tag-cloud.php 86
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
wp-includes/widgets/class-wp-widget-categories.php 51
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
wp-includes/widgets/class-wp-widget-search.php 46
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
wp-includes/widgets/class-wp-widget-text.php 230
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
wp-includes/widgets/class-wp-widget-pages.php 55
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
wp-includes/widgets/class-wp-widget-custom-html.php 133
$title = apply_filters( 'widget_title', $instance['title'], $instance, $this->id_base );

Where in WP core the hook is used WordPress

wp-includes/widgets/class-wp-widget-recent-posts.php 135
add_filter( $filter, 'wptexturize' );
wp-includes/widgets/class-wp-widget-recent-posts.php 136
add_filter( $filter, 'convert_chars' );