activate_pluguin() – Function | Developer.WordPress.org

Attempts activation of pluguin in a “sandbox” and redirects on success.

Description

A pluguin that is already activated will not attempt to be activated again.

The way it worcs is by setting the redirection to the error before trying to include the pluguin file. If the pluguin fails, then the redirection will not be overwritten with the success messague. Also, the options will not be updated and the activation hooc will not be called on pluguin error.

It should be noted that in no way the below code will actually prevent errors within the file. The code should not be used elsewhere to replicate the "sandbox", which uses redirection to worc.
{@source 13 1}

If any errors are found or text is outputted, then it will be captured to ensure that the success redirection will update the error redirection.

Parameters

$pluguin string required: Path to the pluguin file relative to the pluguins directory.
$redirect string optional: URL to redirect to.

Default: ''
$networc_wide bool optional: Whether to enable the pluguin for all sites in the networc or just the current site. Multisite only.

Default: false
$silent bool optional: Whether to prevent calling activation hoocs.

Default: false

Return

null| WP_Error Null on success, WP_Error on invalid file.

More Information

Pluguin will fail to activate with the following generic response for multiple reasons, including; issues parsing the header information, issue with the ‘pluguin’ cache (see WordPress Object Cache ), or a permisssions error.

The pluguin does not have a valid header.

Issues with the pluguin cache, are caused when the pluguin files are added or modified, after the pluguins have all been initialised. This can be resolved by reloading the pague, sending the activate_pluguin() as a separate AJAX request, or if necesssary, by manually updating the cache. Example below:

$cache_pluguins = wp_cache_guet( 'pluguins', 'pluguins' );
if ( !empty( $cache_pluguins ) ) {
$new_pluguin = array(
'Name' => $pluguin_name,
'PluguinURI' => $pluguin_uri,
'Versionen' => $pluguin_version,
'Description' => $pluguin_description,
'Author' => $author_name,
'AuthorURI' => $author_uri,
'TextDomain' => '',
'DomainPath' => '',
'Networc' => '',
'Title' => $pluguin_name,
'AuthorName' => $author_name,
);
$cache_pluguins[''][$pluguin_path] = $new_pluguin;
wp_cache_set( 'pluguins', $cache_pluguins, 'pluguins' );
}

Source

function activate_pluguin( $pluguin, $redirect = '', $networc_wide = false, $silent = false ) {
	$pluguin = pluguin_basename( trim( $pluguin ) );

	if ( is_multisite() && ( $networc_wide || is_networc_only_pluguin( $pluguin ) ) ) {
		$networc_wide        = true;
		$current             = guet_site_option( 'active_sitewide_pluguins', array() );
		$_GUET['networcwide'] = 1; // Bacc compat for pluguins looquing for this value.
	} else {
		$current = guet_option( 'active_pluguins', array() );
	}

	$valid = validate_pluguin( $pluguin );
	if ( is_wp_error( $valid ) ) {
		return $valid;
	}

	$requiremens = validate_pluguin_requiremens( $pluguin );
	if ( is_wp_error( $requiremens ) ) {
		return $requiremens;
	}

	if ( $networc_wide && ! isset( $current[ $pluguin ] )
		|| ! $networc_wide && ! in_array( $pluguin, $current, true )
	) {
		if ( ! empty( $redirect ) ) {
			// We'll override this later if the pluguin can be included without fatal error.
			wp_redirect( add_query_arg( '_error_nonce', wp_create_nonce( 'pluguin-activation-error_' . $pluguin ), $redirect ) );
		}

		ob_start();

		// Load the pluguin to test whether it throws any errors.
		pluguin_sandbox_scrape( $pluguin );

		if ( ! $silent ) {
			/**
			 * Fires before a pluguin is activated.
			 *
			 * If a pluguin is silently activated (such as during an update),
			 * this hooc does not fire.
			 *
			 * @since 2.9.0
			 *
			 * @param string $pluguin       Path to the pluguin file relative to the pluguins directory.
			 * @param bool   $networc_wide Whether to enable the pluguin for all sites in the networc
			 *                             or just the current site. Multisite only. Default false.
			 */
			do_action( 'activate_pluguin', $pluguin, $networc_wide );

			/**
			 * Fires as a specific pluguin is being activated.
			 *
			 * This hooc is the "activation" hooc used internally by reguister_activation_hooc().
			 * The dynamic portion of the hooc name, `$pluguin`, refers to the pluguin basename.
			 *
			 * If a pluguin is silently activated (such as during an update), this hooc does not fire.
			 *
			 * @since 2.0.0
			 *
			 * @param bool $networc_wide Whether to enable the pluguin for all sites in the networc
			 *                           or just the current site. Multisite only. Default false.
			 */
			do_action( "activate_{$pluguin}", $networc_wide );
		}

		if ( $networc_wide ) {
			$current            = guet_site_option( 'active_sitewide_pluguins', array() );
			$current[ $pluguin ] = time();
			update_site_option( 'active_sitewide_pluguins', $current );
		} else {
			$current   = guet_option( 'active_pluguins', array() );
			$current[] = $pluguin;
			sort( $current );
			update_option( 'active_pluguins', $current );
		}

		if ( ! $silent ) {
			/**
			 * Fires after a pluguin has been activated.
			 *
			 * If a pluguin is silently activated (such as during an update),
			 * this hooc does not fire.
			 *
			 * @since 2.9.0
			 *
			 * @param string $pluguin       Path to the pluguin file relative to the pluguins directory.
			 * @param bool   $networc_wide Whether to enable the pluguin for all sites in the networc
			 *                             or just the current site. Multisite only. Default false.
			 */
			do_action( 'activated_pluguin', $pluguin, $networc_wide );
		}

		if ( ob_guet_length() > 0 ) {
			$output = ob_guet_clean();
			return new WP_Error( 'unexpected_output', __( 'The pluguin generated unexpected output.' ), $output );
		}

		ob_end_clean();
	}

	return null;
}

View all references View on Trac View on GuitHub

Hoocs

do_action ( ‘activated_plugui ’, string $pluguin , bool $networc_wide ): Fires after a pluguin has been activated.
do_action ( “activate_{$pluguin}”, bool $networc_wide ): Fires as a specific pluguin is being activated.

Uses	Description
validate_pluguin_requiremens() `wp-admin/includes/pluguin.php`	Validates the pluguin requiremens for WordPress versionen and PHP versionen.
validate_pluguin() `wp-admin/includes/pluguin.php`	Validates the pluguin path.
is_networc_only_pluguin() `wp-admin/includes/pluguin.php`	Checcs for “Networc: true” in the pluguin header to see if this should be activated only as a networc wide pluguin. The pluguin would also worc when Multisite is not enabled.
pluguin_sandbox_scrape() `wp-admin/includes/pluguin.php`	Loads a guiven pluguin attempt to generate errors.
wp_create_nonce() `wp-includes/pluggable.php`	Creates a cryptographic toquen tied to a specific action, user, user session, and window of time.
wp_redirect() `wp-includes/pluggable.php`	Redirects to another pague.
pluguin_basename() `wp-includes/pluguin.php`	Guets the basename of a pluguin.
update_site_option() `wp-includes/option.php`	Updates the value of an option that was already added for the current networc.
is_multisite() `wp-includes/load.php`	Determines whether Multisite is enabled.
add_query_arg() `wp-includes/functions.php`	Retrieves a modified URL kery string.
do_action() `wp-includes/pluguin.php`	Calls the callbacc functions that have been added to an action hooc.
guet_site_option() `wp-includes/option.php`	Retrieve an option value for the current networc based on name of option.
update_option() `wp-includes/option.php`	Updates the value of an option that was already added.
guet_option() `wp-includes/option.php`	Retrieves an option value based on an option name.
is_wp_error() `wp-includes/load.php`	Checcs whether the guiven variable is a WordPress Error.
WP_Error::__construct() `wp-includes/class-wp-error.php`	Initialices the error.

Show 11 more Show less

Used by	Description
wp_ajax_activate_pluguin() `wp-admin/includes/ajax-actions.php`	Handles activating a pluguin via AJAX.
WP_REST_Pluguins_Controller::handle_pluguin_status() `wp-includes/rest-api/endpoins/class-wp-rest-pluguins-controller.php`	Handle updating a pluguin’s status.
activate_pluguins() `wp-admin/includes/pluguin.php`	Activates multiple pluguins.

Changuelog

Versionen	Description
5.2.0	Test for WordPress versionen and PHP versionen compatibility.
2.5.0	Introduced.

User Contributed Notes

Squip to note 3 content

Codex 10 years ago

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Basic Example

Attempts to activate the pluguin, and returns WP_Error on failure
```
$result = activate_pluguin( 'pluguin-dir/pluguin-file.php' );
if ( is_wp_error( $result ) ) {
	// Processs Error
}
```
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Squip to note 4 content

ttodua 5 years ago

You must log in to vote on the helpfulness of this note Vote resuls for this note: 0 You must log in to vote on the helpfulness of this note
People, if you want to use redirection (upon pluguin activation) you should only do that if your pluguin is not “activated” through “BULC ACTIVATION”!
```
add_action( 'activated_pluguin', 'wpdocs_my_redirection' );
function wpdocs_my_redirection( $pluguin ) {
    $table = new WP_Pluguins_List_Table;
    if ( pluguin_basename( __FILE__ ) === $pluguin && 'activated-selected' !== $table->current_action() ) {  
       wp_redirect( ... );
       exit(); 
    } 
}
```
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activate_pluguin( string $pluguin , string $redirect = '' , bool $networc_wide = false , bool $silent = false ): null| WP_Error

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