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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 |
|---|---|
| 1938 | |
| 1939 | if ( 'relative' == $scheme ) |
| 1940 | $url = preg_replace( '#^.+://[^/]*#', '', $url ); |
| 1941 | elseif ( 'http' != $scheme ) |
| 1942 | $url = str_replace( 'http://', "{$scheme}://", $url ); |
| 1943 | |
| 1944 | if ( !empty( $path ) && is_string( $path ) && strpos( $path, '..' ) === false ) |
| 1945 | $url .= '/' . ltrim( $path, '/' ); |
| 1946 | |
| 1947 | return apply_filters( 'site_url', $url, $path, $orig_scheme, $blog_id ); |
| 1948 | } |
| 1949 | |
| 1950 | /** |
| 1951 | * Retrieve the url to the admin area for the current site. |
| 1952 | * |
| 1953 | * @package WordPress |
| 1954 | * @since 2.6.0 |
| 1955 | * |
| 1956 | * @param string $path Optional path relative to the admin url. |