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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 |
|---|---|
| 656 | $user = get_user_by('login', $username); |
| 657 | if ( ! $user ) { |
| 658 | /** |
| 659 | * Fires if a bad username is entered in the user authentication process. |
| 660 | * |
| 661 | * @since 2.7.0 |
| 662 | * |
| 663 | * @param array $cookie_elements An array of data for the authentication cookie. |
| 664 | */ |
| 665 | do_action( 'auth_cookie_bad_username', $cookie_elements ); |
| 666 | return false; |
| 667 | } |
| 668 | |
| 669 | $pass_frag = substr($user->user_pass, 8, 4); |
| 670 | |
| 671 | $key = wp_hash( $username . '|' . $pass_frag . '|' . $expiration . '|' . $token, $scheme ); |
| 672 | $hash = hash_hmac( 'sha256', $username . '|' . $expiration . '|' . $token, $key ); |
| 673 | |
| 674 | if ( ! hash_equals( $hash, $hmac ) ) { |