is_plugin_active( string $plugin )

Determines whether a plugin is active.

Description Description

Only plugins installed in the plugins/ folder can be active.

Plugins in the mu-plugins/ folder can’t be "activated," so this function will return false for those plugins.

For more information on this and similar theme functions, check out the Conditional Tags article in the Theme Developer Handbook.

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Parameters Parameters


(string) (Required) Path to the plugin file relative to the plugins directory.

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Return Return

(bool) True, if in the active plugins list. False, not in the list.

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Source Source

File: wp-admin/includes/plugin.php

function is_plugin_active( $plugin ) {
	return in_array( $plugin, (array) get_option( 'active_plugins', array() ), true ) || is_plugin_active_for_network( $plugin );

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Changelog Changelog

Version Description
2.5.0 Introduced.

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