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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 |
|---|---|
| 2176 | * @param string $form_post The URL to post the form to. |
| 2177 | * @param string $type Chosen type of filesystem. |
| 2178 | * @param bool|WP_Error $error Whether the current request has failed to connect, |
| 2179 | * or an error object. |
| 2180 | * @param string $context Full path to the directory that is tested for |
| 2181 | * being writable. |
| 2182 | * @param array $extra_fields Extra POST fields. |
| 2183 | * @param bool $allow_relaxed_file_ownership Whether to allow Group/World writable. |
| 2184 | */ |
| 2185 | $req_cred = apply_filters( 'request_filesystem_credentials', '', $form_post, $type, $error, $context, $extra_fields, $allow_relaxed_file_ownership ); |
| 2186 | |
| 2187 | if ( '' !== $req_cred ) { |
| 2188 | return $req_cred; |
| 2189 | } |
| 2190 | |
| 2191 | if ( empty( $type ) ) { |
| 2192 | $type = get_filesystem_method( array(), $context, $allow_relaxed_file_ownership ); |
| 2193 | } |
| 2194 | |