Home Backend Development PHP Tutorial PHP data structure and sequential linked list, detailed explanation of the use of linked linear list

PHP data structure and sequential linked list, detailed explanation of the use of linked linear list

May 19, 2018 pm 02:18 PM
php use data structure

This time I will bring you a detailed explanation of the use of PHP data structure and sequential linked list linked linear list. What are the precautions for PHP data structure and sequential linked list linked linear list? The following is a practical case. Get up and take a look.

Linked list operation

1. InitList(L): Initialize the 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): The length of the linked list
6. getElem(L,i): Remove the element
7. LocateElem(L,e): Determine whether e is in the linked list
8. PriorElem(L,i): predecessor
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>";
   }
  }
}
?>
Copy after login

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;
  }
}
?>
Copy after login
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!

Recommended reading:

How to deal with localhost being unavailable after win10 apache configures the virtual host

Steps to temporarily convert WeChat recording to permanent storage using PHP Detailed explanation

The above is the detailed content of PHP data structure and sequential linked list, detailed explanation of the use of linked linear list. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Mandragora: Whispers Of The Witch Tree - How To Unlock The Grappling Hook
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Nordhold: Fusion System, Explained
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial
1668
14
PHP Tutorial
1273
29
C# Tutorial
1256
24
PHP: A Key Language for Web Development 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

PHP and Python: Comparing Two Popular Programming Languages 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 vs. Python: Understanding the Differences 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 in Action: Real-World Examples and Applications 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.

The Enduring Relevance of PHP: Is It Still Alive? 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.

PHP and Python: Different Paradigms Explained PHP and Python: Different Paradigms Explained Apr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP vs. Other Languages: A Comparison PHP vs. Other Languages: A Comparison Apr 13, 2025 am 12:19 AM

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python: Code Examples and Comparison 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.

See all articles