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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 |
|---|---|
| 538 | return false; |
| 539 | } |
| 540 | |
| 541 | $pass_frag = substr($user->user_pass, 8, 4); |
| 542 | |
| 543 | $key = wp_hash($username . $pass_frag . '|' . $expiration, $scheme); |
| 544 | $hash = hash_hmac('md5', $username . '|' . $expiration, $key); |
| 545 | |
| 546 | if ( $hmac != $hash ) { |
| 547 | do_action('auth_cookie_bad_hash', $cookie_elements); |
| 548 | return false; |
| 549 | } |
| 550 | |
| 551 | if ( $expiration < time() ) // AJAX/POST grace period set above |
| 552 | $GLOBALS['login_grace_period'] = 1; |
| 553 | |
| 554 | do_action('auth_cookie_valid', $cookie_elements, $user); |
| 555 | |
| 556 | return $user->ID; |