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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 |
|---|---|
| 532 | if ( function_exists('delete_site_transient') ) |
| 533 | delete_site_transient('update_core'); |
| 534 | else |
| 535 | delete_option('update_core'); |
| 536 | |
| 537 | // Remove maintenance file, we're done. |
| 538 | $wp_filesystem->delete($maintenance_file); |
| 539 | |
| 540 | // If we made it this far: |
| 541 | do_action( '_core_updated_successfully', $wp_version ); |
| 542 | |
| 543 | return $wp_version; |
| 544 | } |
| 545 | |
| 546 | /** |
| 547 | * Copies a directory from one location to another via the WordPress Filesystem Abstraction. |
| 548 | * Assumes that WP_Filesystem() has already been called and setup. |
| 549 | * |
| 550 | * This is a temporary function for the 3.1 -> 3.2 upgrade only and will be removed in 3.3 |