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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 |
|---|---|
| 623 | |
| 624 | /** |
| 625 | * Filter the second-row list of TinyMCE buttons (Visual tab). |
| 626 | * |
| 627 | * @since 2.0.0 |
| 628 | * |
| 629 | * @param array $buttons Second-row list of buttons. |
| 630 | * @param string $editor_id Unique editor identifier, e.g. 'content'. |
| 631 | */ |
| 632 | $mce_buttons_2 = apply_filters( 'mce_buttons_2', $mce_buttons_2, $editor_id ); |
| 633 | |
| 634 | /** |
| 635 | * Filter the third-row list of TinyMCE buttons (Visual tab). |
| 636 | * |
| 637 | * @since 2.0.0 |
| 638 | * |
| 639 | * @param array $buttons Third-row list of buttons. |
| 640 | * @param string $editor_id Unique editor identifier, e.g. 'content'. |
| 641 | */ |