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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 |
|---|---|
| 86 | ) ); |
| 87 | |
| 88 | /** |
| 89 | * Filter number of front page sections in Twenty Seventeen. |
| 90 | * |
| 91 | * @since Twenty Seventeen 1.0 |
| 92 | * |
| 93 | * @param int $num_sections Number of front page sections. |
| 94 | */ |
| 95 | $num_sections = apply_filters( 'twentyseventeen_front_page_sections', 4 ); |
| 96 | |
| 97 | // Create a setting and control for each of the sections available in the theme. |
| 98 | for ( $i = 1; $i < ( 1 + $num_sections ); $i++ ) { |
| 99 | $wp_customize->add_setting( 'panel_' . $i, array( |
| 100 | 'default' => false, |
| 101 | 'sanitize_callback' => 'absint', |
| 102 | 'transport' => 'postMessage', |
| 103 | ) ); |
| 104 | |