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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.
This hook occurs 7 times in this file.
Line | Code |
---|---|
832 | if ( is_array( $context ) ) { |
833 | /** |
834 | * Filters the HTML that is allowed for a given context. |
835 | * |
836 | * @since 3.5.0 |
837 | * |
838 | * @param array[]|string $context Context to judge allowed tags by. |
839 | * @param string $context_type Context name. |
840 | */ |
841 | return apply_filters( 'wp_kses_allowed_html', $context, 'explicit' ); |
842 | } |
843 |
|
844 | switch ( $context ) { |
845 | case 'post': |
846 | /** This filter is documented in wp-includes/kses.php */ |
847 | $tags = apply_filters( 'wp_kses_allowed_html', $allowedposttags, $context ); |
848 |
|
849 | // 5.0.1 removed the `<form>` tag, allow it if a filter is allowing it's sub-elements `<input>` or `<select>`. |
850 | if ( ! CUSTOM_TAGS && ! isset( $tags['form'] ) && ( isset( $tags['input'] ) || isset( $tags['select'] ) ) ) { |
851 | $tags = $allowedposttags; |
852 |
|
853 | $tags['form'] = array( |
854 | 'action' => true, |
855 | 'accept' => true, |
856 | 'accept-charset' => true, |
857 | 'enctype' => true, |
858 | 'method' => true, |
859 | 'name' => true, |
860 | 'target' => true, |
861 | ); |
862 |
|
863 | /** This filter is documented in wp-includes/kses.php */ |
864 | $tags = apply_filters( 'wp_kses_allowed_html', $tags, $context ); |
865 | } |
866 |
|
867 | return $tags; |
868 |
|
869 | case 'user_description': |
870 | case 'pre_user_description': |
871 | $tags = $allowedtags; |
872 | $tags['a']['rel'] = true; |
873 | /** This filter is documented in wp-includes/kses.php */ |
874 | return apply_filters( 'wp_kses_allowed_html', $tags, $context ); |
875 |
|
876 | case 'strip': |
877 | /** This filter is documented in wp-includes/kses.php */ |
878 | return apply_filters( 'wp_kses_allowed_html', array(), $context ); |
879 |
|
880 | case 'entities': |
881 | /** This filter is documented in wp-includes/kses.php */ |
882 | return apply_filters( 'wp_kses_allowed_html', $allowedentitynames, $context ); |
883 |
|
884 | case 'data': |
885 | default: |
886 | /** This filter is documented in wp-includes/kses.php */ |
887 | return apply_filters( 'wp_kses_allowed_html', $allowedtags, $context ); |
888 | } |
889 | } |
890 |
|
891 | /** |
892 | * You add any KSES hooks here. |
893 | * |
894 | * There is currently only one KSES WordPress hook, {@see 'pre_kses'}, and it is called here. |
895 | * All parameters are passed to the hooks and expected to receive a string. |
896 | * |