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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 |
|---|---|
| 1557 | * @param string $type Chosen type of filesystem. |
| 1558 | * @param bool $error Whether the current request has failed to connect. |
| 1559 | * Default false. |
| 1560 | * @param string $context Full path to the directory that is tested for |
| 1561 | * being writable. |
| 1562 | * @param bool $allow_relaxed_file_ownership Whether to allow Group/World writable. |
| 1563 | * Default false. |
| 1564 | * @param array $extra_fields Extra POST fields. |
| 1565 | */ |
| 1566 | $req_cred = apply_filters( 'request_filesystem_credentials', '', $form_post, $type, $error, $context, $extra_fields, $allow_relaxed_file_ownership ); |
| 1567 | if ( '' !== $req_cred ) |
| 1568 | return $req_cred; |
| 1569 | |
| 1570 | if ( empty($type) ) { |
| 1571 | $type = get_filesystem_method( array(), $context, $allow_relaxed_file_ownership ); |
| 1572 | } |
| 1573 | |
| 1574 | if ( 'direct' == $type ) |
| 1575 | return true; |