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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 |
|---|---|
| 76 | $panel_count = 0; |
| 77 | |
| 78 | /** |
| 79 | * Filter number of front page sections in Twenty Seventeen. |
| 80 | * |
| 81 | * @since Twenty Seventeen 1.0 |
| 82 | * |
| 83 | * @param int $num_sections Number of front page sections. |
| 84 | */ |
| 85 | $num_sections = apply_filters( 'twentyseventeen_front_page_sections', 4 ); |
| 86 | |
| 87 | // Create a setting and control for each of the sections available in the theme. |
| 88 | for ( $i = 1; $i < ( 1 + $num_sections ); $i++ ) { |
| 89 | if ( get_theme_mod( 'panel_' . $i ) ) { |
| 90 | $panel_count++; |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | return $panel_count; |