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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 |
|---|---|
| 698 | * @since 2.5.0 |
| 699 | * |
| 700 | * @param string $form_post the URL to post the form to |
| 701 | * @param string $type the chosen Filesystem method in use |
| 702 | * @param boolean $error if the current request has failed to connect |
| 703 | * @param string $context The directory which is needed access to, The write-test will be performed on this directory by get_filesystem_method() |
| 704 | * @return boolean False on failure. True on success. |
| 705 | */ |
| 706 | function request_filesystem_credentials($form_post, $type = '', $error = false, $context = false) { |
| 707 | $req_cred = apply_filters('request_filesystem_credentials', '', $form_post, $type, $error, $context); |
| 708 | if ( '' !== $req_cred ) |
| 709 | return $req_cred; |
| 710 | |
| 711 | if ( empty($type) ) |
| 712 | $type = get_filesystem_method(array(), $context); |
| 713 | |
| 714 | if ( 'direct' == $type ) |
| 715 | return true; |
| 716 | |