static protected function isExecAvailable() {
		if (self::$_execAvailable === null) {
			$disabled = explode(',', ini_get('disable_functions'));
			$disabled = array_map('trim', $disabled);
			
			self::$_execAvailable = ! in_array('exec', $disabled, true);
		}
		
		return self::$_execAvailable;
	}
static protected function isExecAvailable() {
		if (self::$_execAvailable === null) {
			$disabled = explode(',', ini_get('disable_functions'));
			$disabled = array_map('trim', $disabled);
			
			self::$_execAvailable = ! in_array('exec', $disabled, true);
		}
		
		return self::$_execAvailable;
	}
static protected function isExecAvailable ( ) { if ( self :: $ _execAvailable === null ) { $ disabled = explode ( ',' , ini_get ( 'disable_functions' ) ) ; $ disabled = array_map ( 'trim' , $ disabled ) ; self :: $ _execAvailable = ! in_array ( 'exec' , $ disabled , true ) ; } return self :: $ _execAvailable ; }
Is system function available

@return bool
Is system function available