The UnderflowException class(PHP 5 >= 5.1.0) ВведениеException thrown when performing an invalid operation on an empty container, such as removing an element. Обзор классов
     
      UnderflowException
     
 
    
      extends
      RuntimeException
     
     { 
 
   /* Наследуемые методы */ 
    
   } | 
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