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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 |
|---|---|
| 1790 | if ( get_user_option( 'rich_editing' ) == 'true' || ! is_user_logged_in() ) { // default to 'true' for logged out users |
| 1791 | if ( $is_safari ) { |
| 1792 | $wp_rich_edit = ! wp_is_mobile() || ( preg_match( '!AppleWebKit/(\d+)!', $_SERVER['HTTP_USER_AGENT'], $match ) && intval( $match[1] ) >= 534 ); |
| 1793 | } elseif ( $is_gecko || $is_chrome || $is_IE || ( $is_opera && !wp_is_mobile() ) ) { |
| 1794 | $wp_rich_edit = true; |
| 1795 | } |
| 1796 | } |
| 1797 | } |
| 1798 | |
| 1799 | return apply_filters('user_can_richedit', $wp_rich_edit); |
| 1800 | } |
| 1801 | |
| 1802 | /** |
| 1803 | * Find out which editor should be displayed by default. |
| 1804 | * |
| 1805 | * Works out which of the two editors to display as the current editor for a |
| 1806 | * user. The 'html' setting is for the "Text" editor tab. |
| 1807 | * |
| 1808 | * @since 2.5.0 |