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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 |
|---|---|
| 583 | |
| 584 | /** |
| 585 | * Filters the first-row list of TinyMCE buttons (Visual tab). |
| 586 | * |
| 587 | * @since 2.0.0 |
| 588 | * |
| 589 | * @param array $buttons First-row list of buttons. |
| 590 | * @param string $editor_id Unique editor identifier, e.g. 'content'. |
| 591 | */ |
| 592 | $mce_buttons = apply_filters( 'mce_buttons', $mce_buttons, $editor_id ); |
| 593 | |
| 594 | $mce_buttons_2 = array( 'strikethrough', 'hr', 'forecolor', 'pastetext', 'removeformat', 'charmap', 'outdent', 'indent', 'undo', 'redo' ); |
| 595 | |
| 596 | if ( ! wp_is_mobile() ) { |
| 597 | $mce_buttons_2[] = 'wp_help'; |
| 598 | } |
| 599 | |
| 600 | /** |
| 601 | * Filters the second-row list of TinyMCE buttons (Visual tab). |