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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 153 | /** |
| 154 | * Filters the content of the Custom HTML widget. |
| 155 | * |
| 156 | * @since 4.8.1 |
| 157 | * |
| 158 | * @param string $content The widget content. |
| 159 | * @param array $instance Array of settings for the current widget. |
| 160 | * @param WP_Widget_Custom_HTML $widget Current Custom HTML widget instance. |
| 161 | */ |
| 162 | $content = apply_filters( 'widget_custom_html_content', $content, $instance, $this ); |
| 163 | |
| 164 | // Restore post global. |
| 165 | $post = $original_post; |
| 166 | remove_filter( 'shortcode_atts_gallery', array( $this, '_filter_gallery_shortcode_attrs' ) ); |
| 167 | |
| 168 | // Inject the Text widget's container class name alongside this widget's class name for theme styling compatibility. |
| 169 | $args['before_widget'] = preg_replace( '/(?<=\sclass=["\'])/', 'widget_text ', $args['before_widget'] ); |
| 170 | |
| 171 | echo $args['before_widget']; |