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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 |
|---|---|
| 2038 | * @param string $path Optional. Path relative to the content url. |
| 2039 | * @return string Content url link with optional path appended. |
| 2040 | */ |
| 2041 | function content_url($path = '') { |
| 2042 | $url = set_url_scheme( WP_CONTENT_URL ); |
| 2043 | |
| 2044 | if ( !empty($path) && is_string($path) && strpos($path, '..') === false ) |
| 2045 | $url .= '/' . ltrim($path, '/'); |
| 2046 | |
| 2047 | return apply_filters('content_url', $url, $path); |
| 2048 | } |
| 2049 | |
| 2050 | /** |
| 2051 | * Retrieve the url to the plugins directory or to a specific file within that directory. |
| 2052 | * You can hardcode the plugin slug in $path or pass __FILE__ as a second argument to get the correct folder name. |
| 2053 | * |
| 2054 | * @package WordPress |
| 2055 | * @since 2.6.0 |
| 2056 | * |