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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 |
|---|---|
| 3061 | /** |
| 3062 | * Filters the language attributes for display in the html tag. |
| 3063 | * |
| 3064 | * @since 2.5.0 |
| 3065 | * @since 4.3.0 Added the `$doctype` parameter. |
| 3066 | * |
| 3067 | * @param string $output A space-separated list of language attributes. |
| 3068 | * @param string $doctype The type of html document (xhtml|html). |
| 3069 | */ |
| 3070 | return apply_filters( 'language_attributes', $output, $doctype ); |
| 3071 | } |
| 3072 | |
| 3073 | /** |
| 3074 | * Displays the language attributes for the html tag. |
| 3075 | * |
| 3076 | * Builds up a set of html attributes containing the text direction and language |
| 3077 | * information for the page. |
| 3078 | * |
| 3079 | * @since 2.1.0 |