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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 |
|---|---|
| 2106 | * @param string $scheme Optional. Scheme to give the includes url context. |
| 2107 | * @return string Includes url link with optional path appended. |
| 2108 | */ |
| 2109 | function includes_url( $path = '', $scheme = null ) { |
| 2110 | $url = site_url( '/' . WPINC . '/', $scheme ); |
| 2111 | |
| 2112 | if ( $path && is_string( $path ) ) |
| 2113 | $url .= ltrim($path, '/'); |
| 2114 | |
| 2115 | return apply_filters('includes_url', $url, $path); |
| 2116 | } |
| 2117 | |
| 2118 | /** |
| 2119 | * Retrieve the url to the content directory. |
| 2120 | * |
| 2121 | * @package WordPress |
| 2122 | * @since 2.6.0 |
| 2123 | * |
| 2124 | * @param string $path Optional. Path relative to the content url. |