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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 |
|---|---|
| 660 | * Filters the first-row list of TinyMCE buttons (Visual tab). |
| 661 | * |
| 662 | * @since 2.0.0 |
| 663 | * @since 3.3.0 The `$editor_id` parameter was added. |
| 664 | * |
| 665 | * @param array $mce_buttons First-row list of buttons. |
| 666 | * @param string $editor_id Unique editor identifier, e.g. 'content'. Accepts 'classic-block' |
| 667 | * when called from block editor's Classic block. |
| 668 | */ |
| 669 | $mce_buttons = apply_filters( 'mce_buttons', $mce_buttons, $editor_id ); |
| 670 | |
| 671 | $mce_buttons_2 = array( |
| 672 | 'strikethrough', |
| 673 | 'hr', |
| 674 | 'forecolor', |
| 675 | 'pastetext', |
| 676 | 'removeformat', |
| 677 | 'charmap', |
| 678 | 'outdent', |