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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 |
|---|---|
| 707 | * If a plugin is silently activated (such as during an update), |
| 708 | * this hook does not fire. |
| 709 | * |
| 710 | * @since 2.9.0 |
| 711 | * |
| 712 | * @param string $plugin Path to the plugin file relative to the plugins directory. |
| 713 | * @param bool $network_wide Whether to enable the plugin for all sites in the network |
| 714 | * or just the current site. Multisite only. Default false. |
| 715 | */ |
| 716 | do_action( 'activated_plugin', $plugin, $network_wide ); |
| 717 | } |
| 718 | |
| 719 | if ( ob_get_length() > 0 ) { |
| 720 | $output = ob_get_clean(); |
| 721 | return new WP_Error( 'unexpected_output', __( 'The plugin generated unexpected output.' ), $output ); |
| 722 | } |
| 723 | |
| 724 | ob_end_clean(); |
| 725 | } |