is_plugin_active( string $plugin )

使用示例

• 示例1

  <?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
  }

• 示例2

  前端

  <?php
  /**
   * Detect plugin. For frontend 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
  } 
  
  

• 示例3

  管理区

  <?php
  /**
   * Detect plugin. For use in Admin area only.
   */
  if ( is_plugin_active( 'plugin-directory/plugin-file.php' ) ) {
  	//plugin is activated
  }