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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 |
---|---|
63 |
|
64 | /** |
65 | * Filters the title tag content for login page. |
66 | * |
67 | * @since 4.9.0 |
68 | * |
69 | * @param string $login_title The page title, with extra context added. |
70 | * @param string $title The original page title. |
71 | */ |
72 | $login_title = apply_filters( 'login_title', $login_title, $title ); |
73 |
|
74 | ?><!DOCTYPE html> |
75 | <!--[if IE 8]> |
76 | <html xmlns="http://www.w3.org/1999/xhtml" class="ie8" <?php language_attributes(); ?>> |
77 | <![endif]--> |
78 | <!--[if !(IE 8) ]><!--> |
79 | <html xmlns="http://www.w3.org/1999/xhtml" <?php language_attributes(); ?>> |
80 | <!--<![endif]--> |
81 | <head> |