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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 |
|---|---|
| 2053 | |
| 2054 | /** |
| 2055 | * Filters the custom CSS output into the head element. |
| 2056 | * |
| 2057 | * @since 4.7.0 |
| 2058 | * |
| 2059 | * @param string $css CSS pulled in from the Custom CSS post type. |
| 2060 | * @param string $stylesheet The theme stylesheet name. |
| 2061 | */ |
| 2062 | $css = apply_filters( 'wp_get_custom_css', $css, $stylesheet ); |
| 2063 | |
| 2064 | return $css; |
| 2065 | } |
| 2066 | |
| 2067 | /** |
| 2068 | * Updates the `custom_css` post for a given theme. |
| 2069 | * |
| 2070 | * Inserts a `custom_css` post when one doesn't yet exist. |
| 2071 | * |