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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 |
---|---|
420 | global $wp_filesystem; |
421 |
|
422 | require_once(ABSPATH . 'wp-admin/includes/class-wp-filesystem-base.php'); |
423 |
|
424 | $method = get_filesystem_method(); |
425 |
|
426 | if ( ! $method ) |
427 | return false; |
428 |
|
429 | $abstraction_file = apply_filters('filesystem_method_file', ABSPATH . 'wp-admin/includes/class-wp-filesystem-'.$method.'.php', $method); |
430 | if( ! file_exists($abstraction_file) ) |
431 | return; |
432 |
|
433 | require_once($abstraction_file); |
434 | $method = "WP_Filesystem_$method"; |
435 |
|
436 | $wp_filesystem = new $method($args); |
437 |
|
438 | if ( $wp_filesystem->errors->get_error_code() ) |