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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 |
|---|---|
| 1901 | |
| 1902 | /** |
| 1903 | * Filters the Custom CSS Output into the <head>. |
| 1904 | * |
| 1905 | * @since 4.7.0 |
| 1906 | * |
| 1907 | * @param string $css CSS pulled in from the Custom CSS CPT. |
| 1908 | * @param string $stylesheet The theme stylesheet name. |
| 1909 | */ |
| 1910 | $css = apply_filters( 'wp_get_custom_css', $css, $stylesheet ); |
| 1911 | |
| 1912 | return $css; |
| 1913 | } |
| 1914 | |
| 1915 | /** |
| 1916 | * Updates the `custom_css` post for a given theme. |
| 1917 | * |
| 1918 | * Inserts a `custom_css` post when one doesn't yet exist. |
| 1919 | * |