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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 | |
| 533 | if ( !in_array($plugin, $current) ) { |
| 534 | if ( !empty($redirect) ) |
| 535 | wp_redirect(add_query_arg('_error_nonce', wp_create_nonce('plugin-activation-error_' . $plugin), $redirect)); // we'll override this later if the plugin can be included without fatal error |
| 536 | ob_start(); |
| 537 | include_once(WP_PLUGIN_DIR . '/' . $plugin); |
| 538 | |
| 539 | if ( ! $silent ) { |
| 540 | do_action( 'activate_plugin', $plugin, $network_wide ); |
| 541 | do_action( 'activate_' . $plugin, $network_wide ); |
| 542 | } |
| 543 | |
| 544 | if ( $network_wide ) { |
| 545 | $current[$plugin] = time(); |
| 546 | update_site_option( 'active_sitewide_plugins', $current ); |
| 547 | } else { |
| 548 | $current[] = $plugin; |
| 549 | sort($current); |
| 550 | update_option('active_plugins', $current); |