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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 |
|---|---|
| 1696 | |
| 1697 | /** |
| 1698 | * Modify the Custom CSS Output into the <head>. |
| 1699 | * |
| 1700 | * @since 4.7.0 |
| 1701 | * |
| 1702 | * @param string $css CSS pulled in from the Custom CSS CPT. |
| 1703 | * @param string $stylesheet The theme stylesheet name. |
| 1704 | */ |
| 1705 | $css = apply_filters( 'wp_get_custom_css', $css, $stylesheet ); |
| 1706 | |
| 1707 | return $css; |
| 1708 | } |
| 1709 | |
| 1710 | /** |
| 1711 | * Update the `custom_css` post for a given theme. |
| 1712 | * |
| 1713 | * Inserts a `custom_css` post when one doesn't yet exist. |
| 1714 | * |