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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 |
|---|---|
| 287 | * |
| 288 | * By default a subset of the_content filters are applied, including wpautop and wptexturize. |
| 289 | * |
| 290 | * @since 4.8.0 |
| 291 | * |
| 292 | * @param string $text The widget content. |
| 293 | * @param array $instance Array of settings for the current widget. |
| 294 | * @param WP_Widget_Text $widget Current Text widget instance. |
| 295 | */ |
| 296 | $text = apply_filters( 'widget_text_content', $text, $instance, $this ); |
| 297 | } else { |
| 298 | // Now in legacy mode, add paragraphs and line breaks when checkbox is checked. |
| 299 | if ( ! empty( $instance['filter'] ) ) { |
| 300 | $text = wpautop( $text ); |
| 301 | } |
| 302 | |
| 303 | /* |
| 304 | * Manually do shortcodes on the content when the core-added filter is present. It is added by default |
| 305 | * in core by adding do_shortcode() to the 'widget_text_content' filter to apply after wpautop(). |