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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 |
|---|---|
| 738 | |
| 739 | script_concat_settings(); |
| 740 | $wp_styles->do_concat = $concatenate_scripts; |
| 741 | $zip = $compress_css ? 1 : 0; |
| 742 | if ( $zip && defined('ENFORCE_GZIP') && ENFORCE_GZIP ) |
| 743 | $zip = 'gzip'; |
| 744 | |
| 745 | $wp_styles->do_items(false); |
| 746 | |
| 747 | if ( apply_filters('print_admin_styles', true) ) { |
| 748 | if ( !empty($wp_styles->concat) ) { |
| 749 | $dir = $wp_styles->text_direction; |
| 750 | $ver = md5("$wp_styles->concat_version{$dir}"); |
| 751 | $href = $wp_styles->base_url . "/wp-admin/load-styles.php?c={$zip}&dir={$dir}&load=" . trim($wp_styles->concat, ', ') . "&ver=$ver"; |
| 752 | echo "<link rel='stylesheet' href='" . esc_attr($href) . "' type='text/css' media='all' />\n"; |
| 753 | } |
| 754 | |
| 755 | if ( !empty($wp_styles->print_html) ) |
| 756 | echo $wp_styles->print_html; |