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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 |
|---|---|
| 2387 | * @param string $form_post The URL to post the form to. |
| 2388 | * @param string $type Chosen type of filesystem. |
| 2389 | * @param bool|WP_Error $error Whether the current request has failed to connect, |
| 2390 | * or an error object. |
| 2391 | * @param string $context Full path to the directory that is tested for |
| 2392 | * being writable. |
| 2393 | * @param array $extra_fields Extra POST fields. |
| 2394 | * @param bool $allow_relaxed_file_ownership Whether to allow Group/World writable. |
| 2395 | */ |
| 2396 | $req_cred = apply_filters( 'request_filesystem_credentials', '', $form_post, $type, $error, $context, $extra_fields, $allow_relaxed_file_ownership ); |
| 2397 | |
| 2398 | if ( '' !== $req_cred ) { |
| 2399 | return $req_cred; |
| 2400 | } |
| 2401 | |
| 2402 | if ( empty( $type ) ) { |
| 2403 | $type = get_filesystem_method( array(), $context, $allow_relaxed_file_ownership ); |
| 2404 | } |
| 2405 | |