php树型类实例
这篇文章主要介绍了php树型类,涉及数据结构与算法中的树结构,实例相对简单易懂,对于学习数据结构有一定的参考借鉴价值,需要的朋友可以参考下
本文实例讲述了php树型类。分享给大家供大家参考。具体分析如下:
该实例原理简单,学过数据结构的一看就明白是什么道理了,不过今天在使用时数据中出现了子节点id(71)小于父节点id(104).导致部分子节点没被存储入数组,修改了一下,实例代码如下:
复制代码 代码如下:
class tree
{
var $data = array();
var $child = array(-1=>array());
var $layer = array(-1=>-1);
var $parent = array();
var $num = array();
function setnode($id, $parent, $value,$num=0)
{
$parent = $parent ? $parent : 0;
$this->data[$id] = $value;
$this->num[$id] = $num;
if (!isset($this->child[$id])) $this->child[$id] = array();
$this->child[$parent][] = $id;
$this->parent[$id] = $parent;
if (!isset($this->layer[$parent]) && $parent == 0)
{
$this->layer[$id] = 0;
}
else
{
$this->layer[$id] = $this->layer[$parent] + 1;
}
}
function getlist(&$tree, $root= 0)
{
foreach ($this->child[$root] as $key=>$id)
{
$tree[] = $id;
if($this->child[$id]) $this->getlist($tree, $id);
}
}
function getvalue($id)
{
if($this->layer[$id]==0)
{
return $this->data[$id];
}
else
{
return $leftmar.$this->data[$id];
}
}
function getnum($id)
{
return $this->num[$id];
}
function getbitvalue($id)
{
return $this->data[$id];
}
function getlayer($id, $space = false)
{
return $space ? str_repeat($space, $this->layer[$id]) : $this->layer[$id];
}
function getparent($id)
{
return $this->parent[$id];
}
function getparents($id)
{
while ($this->parent[$id] != -1)
{
$id = $parent[$this->layer[$id]] = $this->parent[$id];
}
ksort($parent);
reset($parent);
return $parent;
}
function getchild($id)
{
return $this->child[$id];
}
function getchilds($id = 0)
{
$child = array($id);
$this->getlist($child, $id);
return $child;
}
function printdata()
{
return $this->layer;
}
}
?>
希望本文所述对大家的PHP程序设计有所帮助。
,
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



PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

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,

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
