数据结构
PHP Manual

The SplDoublyLinkedList class

(PHP 5 >= 5.3.0)

简介

The SplDoublyLinkedList class provides the main functionalities of a doubly linked list.

类摘要

SplDoublyLinkedList implements Iterator , ArrayAccess , Countable {
/* 方法 */
__construct ( void )
mixed bottom ( void )
int count ( void )
mixed current ( void )
int getIteratorMode ( void )
bool isEmpty ( void )
mixed key ( void )
void next ( void )
bool offsetExists ( mixed $index )
mixed offsetGet ( mixed $index )
void offsetSet ( mixed $index , mixed $newval )
void offsetUnset ( mixed $index )
mixed pop ( void )
void prev ( void )
void push ( mixed $value )
void rewind ( void )
public string serialize ( void )
void setIteratorMode ( int $mode )
mixed shift ( void )
mixed top ( void )
public void unserialize ( string $serialized )
void unshift ( mixed $value )
bool valid ( void )
}

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数据结构
PHP Manual