original_string: public static function initialize() {
          if (self::$registered) {
              debugging('Shutdown manager is already initialised!');
          }
          self::$registered = true;
          register_shutdown_function(array('core_shutdown_manager', 'shutdown_handler'));
  
          // Signal handlers should only be used when dealing with a CLI script.
          // In the case of PHP called in a web server the server is the owning process and should handle the signal chain
          // properly itself.
          // The 'pcntl' extension is optional and not available on Windows.
          if (CLI_SCRIPT && extension_loaded('pcntl') && function_exists('pcntl_async_signals')) {
              // We capture and handle SIGINT (Ctrl+C) and SIGTERM (termination requested).
              pcntl_async_signals(true);
              pcntl_signal(SIGINT, ['core_shutdown_manager', 'signal_handler']);
              pcntl_signal(SIGTERM, ['core_shutdown_manager', 'signal_handler']);
          }
      }
code: public static function initialize() {
          if (self::$registered) {
              debugging('Shutdown manager is already initialised!');
          }
          self::$registered = true;
          register_shutdown_function(array('core_shutdown_manager', 'shutdown_handler'));
  
          // Signal handlers should only be used when dealing with a CLI script.
          // In the case of PHP called in a web server the server is the owning process and should handle the signal chain
          // properly itself.
          // The 'pcntl' extension is optional and not available on Windows.
          if (CLI_SCRIPT && extension_loaded('pcntl') && function_exists('pcntl_async_signals')) {
              // We capture and handle SIGINT (Ctrl+C) and SIGTERM (termination requested).
              pcntl_async_signals(true);
              pcntl_signal(SIGINT, ['core_shutdown_manager', 'signal_handler']);
              pcntl_signal(SIGTERM, ['core_shutdown_manager', 'signal_handler']);
          }
      }
code_tokens: public static function initialize ( ) { if ( self :: $ registered ) { debugging ( 'Shutdown manager is already initialised!' ) ; } self :: $ registered = true ; register_shutdown_function ( array ( 'core_shutdown_manager' , 'shutdown_handler' ) ) ; // Signal handlers should only be used when dealing with a CLI script. // In the case of PHP called in a web server the server is the owning process and should handle the signal chain // properly itself. // The 'pcntl' extension is optional and not available on Windows. if ( CLI_SCRIPT && extension_loaded ( 'pcntl' ) && function_exists ( 'pcntl_async_signals' ) ) { // We capture and handle SIGINT (Ctrl+C) and SIGTERM (termination requested). pcntl_async_signals ( true ) ; pcntl_signal ( SIGINT , [ 'core_shutdown_manager' , 'signal_handler' ] ) ; pcntl_signal ( SIGTERM , [ 'core_shutdown_manager' , 'signal_handler' ] ) ; } }
docstring: Register self as main shutdown handler.
  
  @private to be called from lib/setup.php only!
docstring_tokens: Register self as main shutdown handler .