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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 |
|---|---|
| 2779 | /** |
| 2780 | * Filters whether to print default gallery styles. |
| 2781 | * |
| 2782 | * @since 3.1.0 |
| 2783 | * |
| 2784 | * @param bool $print Whether to print default gallery styles. |
| 2785 | * Defaults to false if the theme supports HTML5 galleries. |
| 2786 | * Otherwise, defaults to true. |
| 2787 | */ |
| 2788 | if ( apply_filters( 'use_default_gallery_style', ! $html5 ) ) { |
| 2789 | $type_attr = current_theme_supports( 'html5', 'style' ) ? '' : ' type="text/css"'; |
| 2790 | |
| 2791 | $gallery_style = " |
| 2792 | <style{$type_attr}> |
| 2793 | #{$selector} { |
| 2794 | margin: auto; |
| 2795 | } |
| 2796 | #{$selector} .gallery-item { |
| 2797 | float: {$float}; |