Backend Development
PHP Tutorial
Examples of sequential linked lists and linked linear lists of PHP data structures
Examples of sequential linked lists and linked linear lists of PHP data structures
This article mainly introduces the sequential linked list and linked linear list of the PHP data structure. It analyzes in detail the various common operating techniques of PHP to implement the sequential linked list and the linked linear list in the form of examples. Friends who need it can refer to it. Next
The example of this article describes the sequential linked list and linked linear list of PHP data structure. Share it with everyone for your reference, the details are as follows:
Linked list operation
1, InitList(L): Initialize linked list
2, DestroyList(L): Delete the connection
3, ClearList(L): Clear the linked list
4, ListEmpty(L): Determine whether it is empty
5, ListLength(L): Linked list length
6, getElem(L,i): Take out the element
7、 LocateElem(L,e): Determine whether e is in the linked list
8、 PriorElem(L,i): Precursor
9、 NextElem(L,i ): Successor
10, ListInsert(L,i,e): Insert element
11, ListDelete(L,i,): Delete element
Sequential linked list operation
<?php
class ArrayList{
private $list;
private $size;
//构造函数
public function __construct(){
$this->list=array();
$this->size=0;
}
public function initList(){
$this->list=array();
$this->size=0;
}
//删除链表
public function destoryList(){
if(isset($this->list)){
unset($this->list);
$this->size=0;
}
}
//清空链表
public function clearList(){
if(isset($this->list)){
unset($this->list);
}
$this->list=array();
$this->size=0;
}
//判断链表是否为空
public function emptyList(){
if(isset($this->list)){
if($this->size=0)
return TRUE;
else
return FALSE;
}
}
//链表长度
public function lenghtList(){
if(isset($this->list)){
return $this->size;
}
}
//取元素
public function getElem($i){
if($i<1||$i>$this->size){
echo "溢出<br>";
exit();
}
if(isset($this->list)&&is_array($this->list)){
return $this->list[$i-1];
}
}
//是否在链表中
public function locateElem($e){
if(isset($this->list)&&is_array($this->list)){
for($i=0;$i<$this->size;$i++){
if($this->list[$i]==$e){
return $i+1;
}
}
return 0;
}
}
//前驱
public function priorElem($i){
if($i<1||$i>$this->size){
echo "溢出";
exit();
}
if($i==1){
echo "没有前驱";
exit();
}
if(isset($this->list)&&is_array($this->list)){
return $this->list[$i-2];
}
}
//后继
public function nextElem($i){
if($i<1||$i>$this->size){
echo "溢出";
exit();
}
if($i==$this->size){
echo "没有后继";
exit();
}
if(isset($this->list)&&is_array($this->list)){
return $this->list[$i];
}
}
//插入元素
public function insertList($i,$e){
if($i<1||$i>$this->size+1){
echo "插入元素位置有误";
exit();
}
if(isset($this->list)&&is_array($this->list)){
if($this->size==0){
$this->list[$this->size]=$e;
$this->size++;
}else{
$this->size++;
for($j=$this->size-1;$j>=$i;$j--){
$this->list[$j]=$this->list[$j-1];
}
$this->list[$i-1]=$e;
}
}
}
//删除元素
public function deleteLlist($i){
if($i<1||$i>$this->size){
echo "删除元素位置有误";
exit();
}
if(isset($this->list)&&is_array($this->list)){
if($i==$this->size){
unset($this->list[$this->size-1]);
}else{
for($j=$i;$j<$this->size;$j++){
$this->list[$j-1]=$this->list[$j];
}
unset($this->list[$this->size-1]);
}
$this->size--;
}
}
//遍历
public function printList(){
if(isset($this->list)&&is_array($this->list)){
foreach ($this->list as $value){
echo $value." ";
}
echo "<br>";
}
}
}
?>Linked linear table
<?php
class LinkList {
private $head;
private $size;
private $list;
public function __construct(){
$this->head="";
$this->size=0;
$this->list=array();
}
public function initList(){
$this->head="";
$this->size=0;
$this->list=array();
}
//删除链表
public function destoryList(){
if(isset($this->list)&&isset($this->head)){
unset($this->list);
unset($this->head);
}
}
//清空链表
public function clearList(){
if(isset($this->list)){
unset($this->list);
}
$this->list=array();
$this->size=0;
$this->head="";
}
//判断链表是否为空
public function emptyList(){
if(isset($this->list)){
if($this->size==0)
returnTRUE;
else
returnFALSE;
}
}
//链表长度
public function lenghtList(){
if(isset($this->list)){
return$this->size;
}
}
//取元素
public function getElem($i){
if($i<1||$i>$this->size){
echo "溢出<br>";
exit();
}
if(isset($this->list)&&is_array($this->list)){
$j=1;
//头指针
$tmp=$this->head;
while($i>$j){
if($this->list[$tmp]['next']!=null){
$tmp=$this->list[$tmp]['next'];
$j++;
}
}
return $this->list[$tmp]['data'];
}
}
//是否在链表中
public function locateElem($e){
if(isset($this->list)&&is_array($this->list)){
$tmp=$this->head;
while($this->list[$tmp]['data']!=$e){
if($this->list[$tmp]['next']!=null){
$tmp=$this->list[$tmp]['next'];
}else{
returnFALSE;
}
}
return TRUE;
}
}
//前驱
public function priorElem($i){
if($i<1||$i>=$this->size){
echo "溢出";
exit();
}
if($i==1){
echo "没有前驱";
exit();
}
$tmp=$this->head;
$j=1;
while($i>$j+1){
if($this->list[$tmp]['next']!=null){
$j++;
$tmp=$this->list[$tmp]['next'];
}
}
return$this->list[$tmp]['data'];
}
//后继
public function nextElem($i){
if($i<1||$i>$this->size){
echo "溢出";
exit();
}
if($i==$this->size){
echo "没有后继";
exit();
}
$j=1;
$tmp=$this->head;
while($i>=$j){
if($this->list[$tmp]['next']!=null){
$j++;
$tmp=$this->list[$tmp]['next'];
}
}
return$this->list[$tmp]['data'];
}
//插入元素:后插法
public function insertList($i,$e){
if(isset($this->list)&&is_array($this->list)){
//空表
if($this->size==0){
$this->head=$this->uuid();
$this->list[$this->head]['data']=$e;
$this->list[$this->head]['next']=NULL;
$this->size++;
}else{
if($i<1||$i>$this->size){
echo"插入元素位置有误";
exit();
}
$j=1;
$tmp=$this->head;
while($i>$j){
if($this->list[$tmp]['next']!=null){
$j++;
$tmp=$this->list[$tmp]['next'];
}
}
$find=$tmp;
$id=$this->uuid();
if($this->list[$find]['next']==null){
//尾部
$this->list[$find]['next']=$id;
$this->list[$id]['data']=$e;
$this->list[$id]['next']=null;
$this->size++;
}else{
//中间
$this->list[$id]['next']=$this->list[$find]['next'];
$this->list[$find]['next']=$id;
$this->list[$id]['data']=$e;
$this->size++;
}
}
}
}
//删除元素
public function deleteLlist($i){
if($i<1||$i>$this->size){
echo "删除元素位置有误";
exit();
}
if(isset($this->list)&&is_array($this->list)){
if($i==1){
//删除头元素
$this->head=$this->list[$this->head]['next'];
}else{
$tmp=$this->head;
$j=1;
while($i>$j+1){
if($this->list[$tmp]['next']!=null){
$j++;
$tmp=$this->list[$tmp]['next'];
}
}
//找到删除元素的前驱
$find=$tmp;
//删除的元素
if($this->list[$find]['next']!=null){
//不是最后一个元素
$delete=$this->list[$find]['next'];
$this->list[$find]['next']=$this->list[$delete]['next'];
}else{
$this->list[$tmp]['next']=null;
}
}
}
}
public function traverstList(){
$tmp=$this->head;
while($this->list[$tmp]['next']!=NULL){
$this->printList($this->list[$tmp]['data'],TRUE);
$tmp=$this->list[$tmp]['next'];
}
$this->printList($this->list[$tmp]['data'],FALSE);
}
public function printList($str,$flag){
if($flag){
echo$str."->";
}else {
echo$str."<br>";
}
}
//uuid 唯一码
public function uuid($prefix = '') {
$chars =md5(uniqid(mt_rand(), true));
$uuid = substr($chars,0,8) . '-';
$uuid .=substr($chars,8,4) . '-';
$uuid .=substr($chars,12,4) . '-';
$uuid .=substr($chars,16,4) . '-';
$uuid .= substr($chars,20,12);
return $prefix. $uuid;
}
}
?>Articles you may be interested in:
Detailed explanation of the difference between using commas and dots for echo in php
Example of php implementing the statistical algorithm of the number of 1's in binary
##Related explanation of WeChat remote control server for PHP development
The above is the detailed content of Examples of sequential linked lists and linked linear lists of PHP data structures. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1664
14
1423
52
1317
25
1268
29
1246
24
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
PHP and Python: Comparing Two Popular Programming Languages
Apr 14, 2025 am 12:13 AM
PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
PHP in Action: Real-World Examples and Applications
Apr 14, 2025 am 12:19 AM
PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
The Enduring Relevance of PHP: Is It Still Alive?
Apr 14, 2025 am 12:12 AM
PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.
Explain the match expression (PHP 8 ) and how it differs from switch.
Apr 06, 2025 am 12:03 AM
In PHP8, match expressions are a new control structure that returns different results based on the value of the expression. 1) It is similar to a switch statement, but returns a value instead of an execution statement block. 2) The match expression is strictly compared (===), which improves security. 3) It avoids possible break omissions in switch statements and enhances the simplicity and readability of the code.
PHP vs. Python: Understanding the Differences
Apr 11, 2025 am 12:15 AM
PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.
PHP and Python: Code Examples and Comparison
Apr 15, 2025 am 12:07 AM
PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.
