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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 |
|---|---|
| 1004 | /** |
| 1005 | * Filter whether to print default gallery styles. |
| 1006 | * |
| 1007 | * @since 3.1.0 |
| 1008 | * |
| 1009 | * @param bool $print Whether to print default gallery styles. |
| 1010 | * Defaults to false if the theme supports HTML5 galleries. |
| 1011 | * Otherwise, defaults to true. |
| 1012 | */ |
| 1013 | if ( apply_filters( 'use_default_gallery_style', ! $html5 ) ) { |
| 1014 | $gallery_style = " |
| 1015 | <style type='text/css'> |
| 1016 | #{$selector} { |
| 1017 | margin: auto; |
| 1018 | } |
| 1019 | #{$selector} .gallery-item { |
| 1020 | float: {$float}; |
| 1021 | margin-top: 10px; |
| 1022 | text-align: center; |