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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 |
|---|---|
| 518 | $hash = hash_hmac('md5', $username . '|' . $expiration, $key); |
| 519 | |
| 520 | if ( $hmac != $hash ) { |
| 521 | do_action('auth_cookie_bad_hash', $cookie_elements); |
| 522 | return false; |
| 523 | } |
| 524 | |
| 525 | $user = get_userdatabylogin($username); |
| 526 | if ( ! $user ) { |
| 527 | do_action('auth_cookie_bad_username', $cookie_elements); |
| 528 | return false; |
| 529 | } |
| 530 | |
| 531 | do_action('auth_cookie_valid', $cookie_elements, $user); |
| 532 | |
| 533 | return $user->ID; |
| 534 | } |
| 535 | endif; |
| 536 | |