class node{

public $value;

public function __construct($value){

$this->value = $value;

}

}

class queue{

public $head;

public $last;

public $queuelist;

public $size = 0;

//出隊列

public function dequeue(){

if(0 == $this->size){

return ;

exit(‘the queue is empty‘);

}

$current = $this->head;

array_shift($this->queuelist);

$this->head = current($this->queuelist);

$this->size--;

return $current;

}

//入隊列

public function enqueue($value){

$node = new node($value);

$this->queuelist[] = $node;

if( 0 == $this->size){

$this->head = $node;

}

$this->last = $node ;

$this->size++;

}

public function size(){

return $this->size;

}

}

$queue = new queue();

for($i=0;$i<10;$i++){

$queue->enqueue($i);

}

while($value = $queue->dequeue()){

var_dump($value);

}

總結

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