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Arrays and data structures in PHP

Arrays and data structures in PHP

Arrays and data structures in PHP
Classify:   Learning materials / php e-book Release time:  2018-02-09 visits:  2872019
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Download homepage / Learning resources / php e-book
In strongly typed programming languages, there are dedicated data structure solutions. Usually, a container is created, in which any type of data can be stored. The capacity of the container can be determined based on the data stored in the container, and the container structure can be variable in length, such as linked lists, stacks, queues, etc., which are all data structures. commonly used forms. In PHP, arrays are usually used to complete work that can be done using data structures in other languages. It is a type language that can store multiple types of data in the same array, and there is no length limit for arrays in PHP. The capacity of the array to store data can also be automatically adjusted according to the increase or decrease in the number of elements inside.
1. Use arrays to implement stacks
Stack is an implementation form of data structure, and a "first in, last out" data structure is used for data storage. In php, treat the array as a stack and use the two functions array_push() and array_pop() to complete the push and pop operations of data.
-->array_push(): Push one or more units to the end of the array (push onto the stack), and then return the length of the new group.
-->array_pop(): Pop the last unit of the array into the array (pop off the stack)
2. Use arrays to implement queues
Queue is an implementation form of data structure. Data storage adopts "first in, first out" data structure. In PHP, you can use the array_push() and array_shift() functions to complete the data queue operation by treating the array as a stack.
-->array_shift(): Move the element at the beginning of the array out of the array, and then return the value of the deleted element.
​ ​ ​ -->array_shift(): Insert one or more cells at the beginning of the array
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