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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 |
---|---|
513 | return $valid; |
514 |
|
515 | if ( !in_array($plugin, $current) ) { |
516 | if ( !empty($redirect) ) |
517 | 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 |
518 | ob_start(); |
519 | include_once(WP_PLUGIN_DIR . '/' . $plugin); |
520 |
|
521 | if ( ! $silent ) { |
522 | do_action( 'activate_plugin', $plugin, $network_wide ); |
523 | do_action( 'activate_' . $plugin, $network_wide ); |
524 | } |
525 |
|
526 | if ( $network_wide ) { |
527 | $current[$plugin] = time(); |
528 | update_site_option( 'active_sitewide_plugins', $current ); |
529 | } else { |
530 | $current[] = $plugin; |
531 | sort($current); |