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.
Parameters Parameters
- $plugin
-
(string) (Required) Path to the plugin file relative to the plugins directory.
Return Return
(bool) True, if in the active plugins list. False, not in the list.
Source Source
File: wp-admin/includes/plugin.php
function is_plugin_active( $plugin ) {
return in_array( $plugin, (array) get_option( 'active_plugins', array() ) ) || is_plugin_active_for_network( $plugin );
}
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Changelog Changelog
| Version | Description |
|---|---|
| 2.5.0 | Introduced. |
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Front end
<?php /** * Detect plugin. For use on Front End only. */ include_once( ABSPATH . 'wp-admin/includes/plugin.php' ); // check for plugin using plugin name if ( is_plugin_active( 'plugin-directory/plugin-file.php' ) ) { //plugin is activated }<?php /** * Detect plugin. For use on Front End and Back End. */ // check for plugin using plugin name if(in_array('plugin-directory/plugin-file.php', apply_filters('active_plugins', get_option('active_plugins')))){ //plugin is activated }Admin area
<?php /** * Detect plugin. For use in Admin area only. */ if ( is_plugin_active( 'plugin-directory/plugin-file.php' ) ) { //plugin is activated }