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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 |
|---|---|
| 590 | * If a plugin is silently activated (such as during an update), |
| 591 | * this hook does not fire. |
| 592 | * |
| 593 | * @since 2.9.0 |
| 594 | * |
| 595 | * @param string $plugin Plugin path to main plugin file with plugin data. |
| 596 | * @param bool $network_wide Whether to enable the plugin for all sites in the network |
| 597 | * or just the current site. Multisite only. Default is false. |
| 598 | */ |
| 599 | do_action( 'activated_plugin', $plugin, $network_wide ); |
| 600 | } |
| 601 | |
| 602 | if ( ob_get_length() > 0 ) { |
| 603 | $output = ob_get_clean(); |
| 604 | return new WP_Error('unexpected_output', __('The plugin generated unexpected output.'), $output); |
| 605 | } |
| 606 | ob_end_clean(); |
| 607 | } |
| 608 | |