This article introduces the implementation code of a simple complaint page in PHP and shares it with you for your reference. The specific content is as follows
php code:
<?php /* * 设计模式练习 * 1.数据库连接类(单例模式) * 2.调用接口实现留言本功能(工厂模式) * 3.实现分级举报处理功能(责任链模式) * 4.发送不同组合的举报信息(桥接模式) * 5.发送不同格式的举报信息(适配器模式) * 6.在投诉内容后自动追加时间(装饰器模式) * 7.根据会员登录信息变换显示风格(观察者模式) * 8.根据发帖长度加经验值(策略模式) */ interface DB { function conn(); } /** * 单例模式 */ class MysqlSingle implements DB { protected static $_instance = NULL; public static function getInstance() { if (!self::$_instance instanceof self) { self::$_instance = new self; } return self::$_instance; } final protected function __construct() { echo 'Mysql单例创建成功<br>'; } final protected function __clone() { return false; } public function conn() { echo 'Mysql连接成功<br>'; } } /** * 工厂模式 */ interface Factory { function createDB(); } class MysqlFactory implements Factory { public function createDB() { echo 'Mysql工厂创建成功<br>'; return MysqlSingle::getInstance(); } } /** * 根据用户名显示不同风格 * 观察者模式 */ class Observer implements SplSubject { protected $_observers = NULL; public $_style = NULL; public function __construct($style) { $this->_style = $style; $this->_observers = new SplObjectStorage(); } public function show() { $this->notify(); } public function attach(SplObserver $observer) { $this->_observers->attach($observer); } public function detach(SplObserver $observer) { $this->_observers->detach($observer); } public function notify() { $this->_observers->rewind(); while ($this->_observers->valid()) { $observer = $this->_observers->current(); $observer->update($this); $this->_observers->next(); } } } class StyleA implements SplObserver { public function update(SplSubject $subject) { echo $subject->_style . ' 模块A<br>'; } } class StyleB implements SplObserver { public function update(SplSubject $subject) { echo $subject->_style . ' 模块B<br>'; } } /** * 根据不同方式进行投诉 * 桥接模式 */ class Bridge { protected $_obj = NULL; public function __construct($obj) { $this->_obj = $obj; } public function msg($type) { } public function show() { $this->msg(); $this->_obj->msg(); } } class BridgeEmail extends Bridge { public function msg() { echo 'Email>>'; } } class BridgeSms extends Bridge { public function msg() { echo 'Sms>>'; } } class Normal { public function msg() { echo 'Normal<br>'; } } class Danger { public function msg() { echo 'Danger<br>'; } } /** * 适配器模式 */ class Serialize { public $content = NULL; public function __construct($content) { $this->content = serialize($content); } public function show() { return '序列化格式:<br>' . $this->content; } } class JsonAdapter extends Serialize { public function __construct($content) { parent::__construct($content); $tmp = unserialize($this->content); $this->content = json_encode($tmp, TRUE); } public function show() { return 'Json格式:<br>' . $this->content; } } /** * 在投诉内容后自动追加 * 装饰器模式 */ class Base { protected $_content = NULL; public function __construct($content) { $this->_content = $content; } public function getContent() { return $this->_content; } } class Decorator { private $_base = NULL; public function __construct(Base $base) { $this->_base = $base; } public function show() { return $this->_base->getContent() . '>>系统时间:' . date('Y-m-d H:i:s', time()); } } /** * 分级举报处理功能 * 责任链模式 */ class level1 { protected $_level = 1; protected $_top = 'Level2'; public function deal($level) { if ($level <= $this->_level) { echo '处理级别:1<br>'; return; } $top = new $this->_top; $top->deal($level); } } class level2 { protected $_level = 2; protected $_top = 'Level3'; public function deal($level) { if ($level <= $this->_level) { echo '处理级别:2<br>'; return; } $top = new $this->_top; $top->deal($level); } } class level3 { protected $_level = 3; protected $_top = 'Level2'; public function deal($level) { echo '处理级别:3<br>'; return; } } if (!empty($_POST)) { echo '<h1 id="PHP设计模式">PHP设计模式</h1>'; //连接数据库——工厂+单例模式 $mysqlFactory = new MysqlFactory(); $single = $mysqlFactory->createDB(); $single->conn(); echo '<br>'; //观察者模式 $username = $_POST['username']; $ob = new Observer($username); $a = new StyleA(); $ob->attach($a); $b = new StyleB(); $ob->attach($b); $ob->show(); echo '<br>'; $ob->detach($b); $ob->show(); echo '<br>'; //桥接模式 $typeM = $_POST['typeM']; $typeN = 'Bridge' . $_POST['typeN']; $obj = new $typeN(new $typeM); $obj->show(); echo '<br>'; //适配器模式 $post = $_POST; $obj = new Serialize($post); echo $obj->show(); echo '<br>'; $json = new JsonAdapter($post); echo $json->show(); echo '<br>'; echo '<br>'; //装饰器模式 $content = $_POST['content']; $decorator = new Decorator(new Base($content)); echo $decorator->show(); echo '<br>'; //责任链模式 echo '<br>'; $level = $_POST['level']; $deal = new Level1(); $deal->deal(intval($level)); return; } require("0.html");
html code:
<!DOCTYPE html> <!-- To change this license header, choose License Headers in Project Properties. To change this template file, choose Tools | Templates and open the template in the editor. --> <html> <head> <title>PHP设计模式</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <style> div{border:solid gray 1px;margin-top:10px;height: 100px;width: 200px;} </style> </head> <body> <form action="0.php" method="post"> <h1 id="用户名">用户名</h1> <select id="username" name="username"> <option value="Tom">Tom</option> <option value="Lily">Lily</option> </select> <h1 id="投诉方式">投诉方式</h1> <select id="type" name="typeM"> <option value="Normal">Normal</option> <option value="Danger">Danger</option> </select> <select id="type" name="typeN"> <option value="Email">Email</option> <option value="Sms">Sms</option> </select> <h1 id="处理级别">处理级别</h1> <select id="level" name="level"> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> </select> <h1 id="投诉内容">投诉内容</h1> <textarea id="content" name="content" rows="3"></textarea> <button type="submit">提交</button> </form> </body> </html>
The above is the entire content of this article, I hope it will be helpful to everyone’s study.

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。


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