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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 |
|---|---|
| 1951 | |
| 1952 | /** |
| 1953 | * Filters the custom CSS output into the head element. |
| 1954 | * |
| 1955 | * @since 4.7.0 |
| 1956 | * |
| 1957 | * @param string $css CSS pulled in from the Custom CSS post type. |
| 1958 | * @param string $stylesheet The theme stylesheet name. |
| 1959 | */ |
| 1960 | $css = apply_filters( 'wp_get_custom_css', $css, $stylesheet ); |
| 1961 | |
| 1962 | return $css; |
| 1963 | } |
| 1964 | |
| 1965 | /** |
| 1966 | * Updates the `custom_css` post for a given theme. |
| 1967 | * |
| 1968 | * Inserts a `custom_css` post when one doesn't yet exist. |
| 1969 | * |