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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 |
|---|---|
| 1729 | /** |
| 1730 | * Filters whether to print default gallery styles. |
| 1731 | * |
| 1732 | * @since 3.1.0 |
| 1733 | * |
| 1734 | * @param bool $print Whether to print default gallery styles. |
| 1735 | * Defaults to false if the theme supports HTML5 galleries. |
| 1736 | * Otherwise, defaults to true. |
| 1737 | */ |
| 1738 | if ( apply_filters( 'use_default_gallery_style', ! $html5 ) ) { |
| 1739 | $gallery_style = " |
| 1740 | <style type='text/css'> |
| 1741 | #{$selector} { |
| 1742 | margin: auto; |
| 1743 | } |
| 1744 | #{$selector} .gallery-item { |
| 1745 | float: {$float}; |
| 1746 | margin-top: 10px; |
| 1747 | text-align: center; |