wp_ajax_activate_plugin()

Compatibility

Present in every tracked release (6.7.10 to 7.1.3), and compiles on PHP 7.4 through 8.6-dev.

Performance profile

How much work a call to wp_ajax_activate_plugin() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class

Moderate

Reads stored settings via get_option(), cached per request but not free on a cold cache.

Scaling

Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions

65–119

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 119.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

0

Nothing in core calls this; the cost is only what you spend yourself.

What it touches

• hookthird-party callbacksdo_action()one call below wp_ajax_activate_plugin()
• optionoption read or writeget_option()one call below wp_ajax_activate_plugin()

Further down the call graph this can also reach cache, serialize, query and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.

What one call costs · 64 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost wp_ajax_activate_plugin() can have, taken from its control-flow graph on PHP 8.5.

Uses · 11

• check_ajax_referer()Verifies the Ajax request to prevent processing requests external of the blog.
• wp_send_json_error()Sends a JSON response back to an Ajax request, indicating failure.
• __()Retrieves the translation of $text.
• wp_unslash()Removes slashes from a string or recursively removes slashes from strings within an array.
• current_user_can()Returns whether the current user has the specified capability.
• is_multisite()Determines whether Multisite is enabled.
• is_network_only_plugin()Checks for "Network: true" in the plugin header to see if this should be activated only as a network wide plugin. The plugin would also work when Multisite is not enabled.
• is_plugin_active()Determines whether a plugin is active.
• activate_plugin()Attempts activation of plugin in a "sandbox" and redirects on success.
• is_wp_error()Checks whether the given variable is a WordPress Error.
• wp_send_json_success()Sends a JSON response back to an Ajax request, indicating success.

Source code

View on Trac ↗View on GitHub ↗

4568function wp_ajax_activate_plugin() {4569	check_ajax_referer( 'updates' );4570 4571	if ( empty( $_POST['name'] ) || empty( $_POST['slug'] ) || empty( $_POST['plugin'] ) ) {4572		wp_send_json_error(4573			array(4574				'slug'         => '',4575				'pluginName'   => '',4576				'plugin'       => '',4577				'errorCode'    => 'no_plugin_specified',4578				'errorMessage' => __( 'No plugin specified.' ),4579			)4580		);4581	}4582 4583	$status = array(4584		'activate'   => 'plugin',4585		'slug'       => wp_unslash( $_POST['slug'] ),4586		'pluginName' => wp_unslash( $_POST['name'] ),4587		'plugin'     => wp_unslash( $_POST['plugin'] ),4588	);4589 4590	if ( ! current_user_can( 'activate_plugin', $status['plugin'] ) ) {4591		$status['errorMessage'] = __( 'Sorry, you are not allowed to activate plugins on this site.' );4592		wp_send_json_error( $status );4593	}4594 4595	// A network-only plugin is activated for the entire network.4596	if ( is_multisite() && is_network_only_plugin( $status['plugin'] ) && ! current_user_can( 'manage_network_plugins' ) ) {4597		$status['errorMessage'] = __( 'Sorry, you are not allowed to activate this plugin.' );4598		wp_send_json_error( $status );4599	}4600 4601	if ( is_plugin_active( $status['plugin'] ) ) {4602		$status['errorMessage'] = sprintf(4603			/* translators: %s: Plugin name. */4604			__( '%s is already active.' ),4605			$status['pluginName']4606		);4607	}4608 4609	$activated = activate_plugin( $status['plugin'] );4610 4611	if ( is_wp_error( $activated ) ) {4612		$status['errorMessage'] = $activated->get_error_message();4613		wp_send_json_error( $status );4614	}4615 4616	wp_send_json_success( $status );4617}

Changelog

Introduced in 6.5.0. Unchanged from 6.7.10 through 7.1.3.

1. 6.7.10
2. 6.8.11
3. 6.9.10
4. 7.0.7
5. 7.1.3

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data

Generated from the wordpress-develop 6.8.11 tag, from src/wp-admin/includes/ajax-actions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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