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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 |
|---|---|
| 607 | |
| 608 | if ( $hmac != $hash ) { |
| 609 | do_action('auth_cookie_bad_hash', $cookie_elements); |
| 610 | return false; |
| 611 | } |
| 612 | |
| 613 | if ( $expiration < time() ) // AJAX/POST grace period set above |
| 614 | $GLOBALS['login_grace_period'] = 1; |
| 615 | |
| 616 | do_action('auth_cookie_valid', $cookie_elements, $user); |
| 617 | |
| 618 | return $user->ID; |
| 619 | } |
| 620 | endif; |
| 621 | |
| 622 | if ( !function_exists('wp_generate_auth_cookie') ) : |
| 623 | /** |
| 624 | * Generate authentication cookie contents. |
| 625 | * |