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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 |
|---|---|
| 659 | |
| 660 | /** |
| 661 | * Filters the fourth-row list of TinyMCE buttons (Visual tab). |
| 662 | * |
| 663 | * @since 2.5.0 |
| 664 | * |
| 665 | * @param array $buttons Fourth-row list of buttons. |
| 666 | * @param string $editor_id Unique editor identifier, e.g. 'content'. |
| 667 | */ |
| 668 | $mce_buttons_4 = apply_filters( 'mce_buttons_4', array(), $editor_id ); |
| 669 | } |
| 670 | |
| 671 | $body_class = $editor_id; |
| 672 | |
| 673 | if ( $post = get_post() ) { |
| 674 | $body_class .= ' post-type-' . sanitize_html_class( $post->post_type ) . ' post-status-' . sanitize_html_class( $post->post_status ); |
| 675 | |
| 676 | if ( post_type_supports( $post->post_type, 'post-formats' ) ) { |
| 677 | $post_format = get_post_format( $post ); |