我是靠谱客的博主 害羞樱桃,最近开发中收集的这篇文章主要介绍PHP设计模式-单例模式在ThinkPHP中的应用,觉得挺不错的,现在分享给大家,希望可以做个参考。

概述

简单引用单例模式

将单例类文件放入到TP核心库下
D:phpstudy_proWWWprojecttp51thinkphplibrarythink
在这里插入图片描述声明命名空间
namespace think;

<?php
//加入命名空间
namespace think;
/**
 * @var HttpClient
 */
class HttpClient
{
    /**
     * @var 请求的路径
     */
    private $url;

    /**
     * @var 请求方式
     */
    private $method;

    /**
     * @var 请求参数
     */
    private $param;

    /**
     * @var 请求头
     */
    private $header;

    /**
     * @var 响应结果
     */
    private $response;

    //1.创建一个静态私有变量存放实例化的对象
    private static $instance;

    //2.创建一个私有构造函数
    private function __construct()
    {
    }
    //3.防止外部克隆该类
    private function __clone()
    {
    }
    //4.防止序列化
    private function __wakeup()
    {
    }
    //5.提供唯一的静态入口
    public static function getInstance()
    {
        //判断$instance变量是否是HttpClient类的实例,如果不是,则实例化本身,如果是则直接返回
        //instanceof 用于确定一个 PHP 变量是否属于某一类 class 的实例
        if(!(static::$instance instanceof static )){ //static 换成self也可以,只不过static比self更精准些
            static::$instance  = new static;
        }
        return static::$instance;
    }


    /**
     * @var 设置请求路径
     *
     * @param string url
     *
     * @return HttpClient
     */
    private function setUrl(String $url = '')
    {
        $this->url = $url;
        return $this;
    }

    /**
     * @var 设置请求参数
     *
     * @param array param
     *
     * @return HttpClient
     */
    private function setParam(Array $param)
    {
        $this->param = http_build_query($param);
        return $this;
    }

    /**
     * @var 设置请求头部
     *
     * @param array header
     *
     * @return HttpClient
     */
    private function setHeader(Array $header)
    {
        foreach ($header as $key => $value) {
            if (is_string($key)) {
                $key = constant(strtoupper($key));
            }

            $this->header[$key] = $value;
        }

        return $this;
    }

    /**
     * @var 设置请求方式
     *
     * @param string method
     *
     * @return HttpClient
     */
    private function setMethod(String $method = 'GET')
    {
        $this->method = $method;
        return $this;
    }

    /**
     * @var 开始请求
     *
     * @return HttpClient
     */
    private function exec()
    {
        $ch = curl_init();

        if ($this->header) {
            foreach ($this->header as $key => $value) {
                curl_setopt($ch, $key, $value);
            }
        }

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_URL, $this->url);

        if ($this->method == 'POST') {
            curl_setopt($ch, CURLOPT_POST, true);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $this->param);
            curl_setopt($ch, CURLOPT_HTTPHEADER, array(
                'Content-Type: application/x-www-form-urlencoded; charset=utf-8',
                'Content-Length: ' . strlen($this->param)
            ));
        } elseif ($this->method == 'GET') {
            curl_setopt($ch, CURLOPT_URL, $this->url.'?'.$this->param);
            curl_setopt($ch, CURLOPT_HEADER, false);
        }

        $info = curl_getinfo($ch);
        $data = curl_exec($ch);
        $error = curl_errno($ch);
        curl_close($ch);

        $this->response = [
            'code' => $error ? 1 : 0,
            'message' => $error,
            'info' => $info,
            'data' => $data,
        ];
        return $this;
    }

    /**
     * @var 获取响应数据
     *
     * @throw Exception
     *
     * @return array|string
     */
    public function getBody()
    {
        if (!$this->response) {
            throw new Exception('no httpRequest');
        }

        return $this->response['data'];
    }

    /**
     * @var 获取响应状态码
     *
     * @throw Exception
     *
     * @return int
     */
    public function getCode()
    {
        if (!$this->response) {
            throw new Exception('no httpRequest');
        }

        return $this->response['code'];
    }

    /**
     * @var 获取错误信息
     *
     * @throw Exception
     *
     * @return int|array
     */
    public function getMessage()
    {
        if (!$this->response) {
            throw new Exception('no httpRequest');
        }

        return $this->response['message'];
    }

    /**
     * @var 获取响应信息
     *
     * @return array
     */
    public function getInfo()
    {
        if (!$this->response) {
            throw new Exception('no httpRequest');
        }

        return $this->response['info'];
    }

    /**
     * @var GET请求
     *
     * @param string url
     * @param array param
     * @param array header
     *
     * @return HttpClient
     */
    public function get(String $url, Array $param = [], Array $header = [])
    {
        return $this->setMethod('GET')->setUrl($url)->setParam($param)->setHeader($header)->exec();
    }

    /**
     * @var POST请求
     *
     * @param string url
     * @param array param
     * @param array header
     *
     * @return HttpClient
     */
    public function post(String $url, Array $param = [], $header = [])
    {
        return $this->setMethod('POST')->setUrl($url)->setParam($param)->setHeader($header)->exec();
    }

    /**
     * @var 清理垃圾
     */
    public function __destruct()
    {
        $this->url = null;
        $this->method = null;
        $this->param = null;
        $this->header = null;
        $this->response = null;
    }
}

TP下使用单例类

<?php
namespace appindexcontroller;
use thinkHttpClient;

class Index
{

    public function test()
    {
        $res = HttpClient::getInstance()->get("https://fanyi.baidu.com/translate?aldtype=16047&query=&keyfrom=baidu&smartresult=dict&lang=auto2zh#en/zh/framework");

        var_dump($res);
    }
}

显示结果页面
在这里插入图片描述

通过助手函数使用单例

在D:phpstudy_proWWWprojecttp51thinkphphelper.php助手函数类中加入
1.先引入think下的单例类
2.判断httpclient函数是否创建,未创建则创建并返回该函数

use thinkHttpClient;

if(!function_exists('httpclient')){
    function httpclient()
    {
        return HttpClient::getInstance();
    }
}

在这里插入图片描述使用

<?php
namespace appindexcontroller;
//use thinkHttpClient;

class Index
{

    public function test()
    {
        $res = httpclient()->get("https://fanyi.baidu.com/translate?aldtype=16047&query=&keyfrom=baidu&smartresult=dict&lang=auto2zh#en/zh/framework");

        var_dump($res);
    }
}

返回结果页面
在这里插入图片描述

通过依赖注入方式使用单例

单例模式已经被考虑列入到反模式中!请使用依赖注入获得更好的代码可测试性和可控性!

1.D:phpstudy_proWWWprojecttp51thinkphplibrarythink下的HttpClient.php类不能是单例类

<?php
//加入命名空间
namespace think;
/**
 * @var HttpClient
 */
class HttpClient
{
    /**
     * @var 请求的路径
     */
    private $url;

    /**
     * @var 请求方式
     */
    private $method;

    /**
     * @var 请求参数
     */
    private $param;

    /**
     * @var 请求头
     */
    private $header;

    /**
     * @var 响应结果
     */
    private $response;

    /**
     * @var 设置请求路径
     *
     * @param string url
     *
     * @return HttpClient
     */
    private function setUrl(String $url = '')
    {
        $this->url = $url;
        return $this;
    }

    /**
     * @var 设置请求参数
     *
     * @param array param
     *
     * @return HttpClient
     */
    private function setParam(Array $param)
    {
        $this->param = http_build_query($param);
        return $this;
    }

    /**
     * @var 设置请求头部
     *
     * @param array header
     *
     * @return HttpClient
     */
    private function setHeader(Array $header)
    {
        foreach ($header as $key => $value) {
            if (is_string($key)) {
                $key = constant(strtoupper($key));
            }

            $this->header[$key] = $value;
        }

        return $this;
    }

    /**
     * @var 设置请求方式
     *
     * @param string method
     *
     * @return HttpClient
     */
    private function setMethod(String $method = 'GET')
    {
        $this->method = $method;
        return $this;
    }

    /**
     * @var 开始请求
     *
     * @return HttpClient
     */
    private function exec()
    {
        $ch = curl_init();

        if ($this->header) {
            foreach ($this->header as $key => $value) {
                curl_setopt($ch, $key, $value);
            }
        }

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_URL, $this->url);

        if ($this->method == 'POST') {
            curl_setopt($ch, CURLOPT_POST, true);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $this->param);
            curl_setopt($ch, CURLOPT_HTTPHEADER, array(
                'Content-Type: application/x-www-form-urlencoded; charset=utf-8',
                'Content-Length: ' . strlen($this->param)
            ));
        } elseif ($this->method == 'GET') {
            curl_setopt($ch, CURLOPT_URL, $this->url.'?'.$this->param);
            curl_setopt($ch, CURLOPT_HEADER, false);
        }

        $info = curl_getinfo($ch);
        $data = curl_exec($ch);
        $error = curl_errno($ch);
        curl_close($ch);

        $this->response = [
            'code' => $error ? 1 : 0,
            'message' => $error,
            'info' => $info,
            'data' => $data,
        ];
        return $this;
    }

    /**
     * @var 获取响应数据
     *
     * @throw Exception
     *
     * @return array|string
     */
    public function getBody()
    {
        if (!$this->response) {
            throw new Exception('no httpRequest');
        }

        return $this->response['data'];
    }

    /**
     * @var 获取响应状态码
     *
     * @throw Exception
     *
     * @return int
     */
    public function getCode()
    {
        if (!$this->response) {
            throw new Exception('no httpRequest');
        }

        return $this->response['code'];
    }

    /**
     * @var 获取错误信息
     *
     * @throw Exception
     *
     * @return int|array
     */
    public function getMessage()
    {
        if (!$this->response) {
            throw new Exception('no httpRequest');
        }

        return $this->response['message'];
    }

    /**
     * @var 获取响应信息
     *
     * @return array
     */
    public function getInfo()
    {
        if (!$this->response) {
            throw new Exception('no httpRequest');
        }

        return $this->response['info'];
    }

    /**
     * @var GET请求
     *
     * @param string url
     * @param array param
     * @param array header
     *
     * @return HttpClient
     */
    public function get(String $url, Array $param = [], Array $header = [])
    {
        return $this->setMethod('GET')->setUrl($url)->setParam($param)->setHeader($header)->exec();
    }

    /**
     * @var POST请求
     *
     * @param string url
     * @param array param
     * @param array header
     *
     * @return HttpClient
     */
    public function post(String $url, Array $param = [], $header = [])
    {
        return $this->setMethod('POST')->setUrl($url)->setParam($param)->setHeader($header)->exec();
    }

    /**
     * @var 清理垃圾
     */
    public function __destruct()
    {
        $this->url = null;
        $this->method = null;
        $this->param = null;
        $this->header = null;
        $this->response = null;
    }
}

2.D:phpstudy_proWWWprojecttp51thinkphplibrarythinkfacade创建一个HttpClient.php同名文件

<?php
namespace thinkfacade;

use thinkFacade;

class HttpClient extends Facade
{
    protected static function getFacadeClass()
    {
        return '\think\HttpClient';
    }
}

使用

<?php
namespace appindexcontroller;
use thinkfacadeHttpClient;

class Index
{

    public function test()
    {
        $res = HttpClient::get("https://fanyi.baidu.com/translate?aldtype=16047&query=&keyfrom=baidu&smartresult=dict&lang=auto2zh#en/zh/framework");

        var_dump($res);
    }
}

显示结果页面
在这里插入图片描述

最后

以上就是害羞樱桃为你收集整理的PHP设计模式-单例模式在ThinkPHP中的应用的全部内容,希望文章能够帮你解决PHP设计模式-单例模式在ThinkPHP中的应用所遇到的程序开发问题。

如果觉得靠谱客网站的内容还不错,欢迎将靠谱客网站推荐给程序员好友。

本图文内容来源于网友提供,作为学习参考使用,或来自网络收集整理,版权属于原作者所有。
点赞(34)

评论列表共有 0 条评论

立即
投稿
返回
顶部