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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 |
---|---|
3828 | /** |
3829 | * Filters the language attributes for display in the html tag. |
3830 | * |
3831 | * @since 2.5.0 |
3832 | * @since 4.3.0 Added the `$doctype` parameter. |
3833 | * |
3834 | * @param string $output A space-separated list of language attributes. |
3835 | * @param string $doctype The type of html document (xhtml|html). |
3836 | */ |
3837 | return apply_filters( 'language_attributes', $output, $doctype ); |
3838 | } |
3839 |
|
3840 | /** |
3841 | * Displays the language attributes for the html tag. |
3842 | * |
3843 | * Builds up a set of html attributes containing the text direction and language |
3844 | * information for the page. |
3845 | * |
3846 | * @since 2.1.0 |