How to achieve the effect of stack and queue?

Stack and Queue

1. StackandQueueboth belong to thedata structure

2. StackisLIFO

3. ##QueueisFIFO

array_push(array input array, value should be pushed into the first value at the end of array )

array_pop(): Pop the last element from the stack.

 1 [1] => 14 [2] => 34 [3] => 89 ) ?>

queue

array_shift(): Dequeue and remove the first element in the queue

array_unshift(): Insert an element at the beginning of the array

 1 [1] => 14 [2] => 34 [3] => 89 [4] => 67 ) echo "
"; array_shift($array);//将先进入队列的数组元素，出队列 print_r($array);//Array ( [0] => 14 [1] => 34 [2] => 89 [3] => 67 ) echo "
"; array_unshift($array,'66');//在队列头部插入一个元素 print_r($array);//Array ( [0] => 66 [1] => 14 [2] => 34 [3] => 89 [4] => 67 ) ?>

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