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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 6 times in this file.
| Line | Code |
|---|---|
| 627 | /** |
| 628 | * Filters HTML elements allowed for a given context. |
| 629 | * |
| 630 | * @since 3.5.0 |
| 631 | * |
| 632 | * @param string $tags Allowed tags, attributes, and/or entities. |
| 633 | * @param string $context Context to judge allowed tags by. Allowed values are 'post', |
| 634 | * 'data', 'strip', 'entities', 'explicit', or the name of a filter. |
| 635 | */ |
| 636 | return apply_filters( 'wp_kses_allowed_html', $context, 'explicit' ); |
| 637 | } |
| 638 | |
| 639 | switch ( $context ) { |
| 640 | case 'post': |
| 641 | /** This filter is documented in wp-includes/kses.php */ |
| 642 | return apply_filters( 'wp_kses_allowed_html', $allowedposttags, $context ); |
| 643 | |
| 644 | case 'user_description': |
| 645 | case 'pre_user_description': |
| 646 | $tags = $allowedtags; |
| 647 | $tags['a']['rel'] = true; |
| 648 | /** This filter is documented in wp-includes/kses.php */ |
| 649 | return apply_filters( 'wp_kses_allowed_html', $tags, $context ); |
| 650 | |
| 651 | case 'strip': |
| 652 | /** This filter is documented in wp-includes/kses.php */ |
| 653 | return apply_filters( 'wp_kses_allowed_html', array(), $context ); |
| 654 | |
| 655 | case 'entities': |
| 656 | /** This filter is documented in wp-includes/kses.php */ |
| 657 | return apply_filters( 'wp_kses_allowed_html', $allowedentitynames, $context); |
| 658 | |
| 659 | case 'data': |
| 660 | default: |
| 661 | /** This filter is documented in wp-includes/kses.php */ |
| 662 | return apply_filters( 'wp_kses_allowed_html', $allowedtags, $context ); |
| 663 | } |
| 664 | } |
| 665 | |
| 666 | /** |
| 667 | * You add any kses hooks here. |
| 668 | * |
| 669 | * There is currently only one kses WordPress hook, {@see 'pre_kses'}, and it is called here. |
| 670 | * All parameters are passed to the hooks and expected to receive a string. |
| 671 | * |