PHP_APP通信接口—封装通信接口的方法

通信数据的标准格式：

code状态码（200，400等）；

message提示信息（登录失败，数据返回成功等）；

data返回数据；

1、json 方式封装通信接口

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方法：json_encode($value);

注：该函数只能接受utf-8编码的数据；如果传递其他格式的数据该函数会返回null;

<span><?php
</span><span>    class </span>Response
    {
        <span><em>/**
</em></span><span><em>         * </em></span><span宋体'"><em>按</em></span><span><em>json</em></span><span宋体'"><em>方式输出通信数据
</em></span><span宋体'"><em></em></span><span><em>* </em></span><span><em>@param </em></span><span><em>int $code </em></span><span宋体'"><em>状态码
</em></span><span宋体'"><em></em></span><span><em>* </em></span><span><em>@param </em></span><span><em>string $message </em></span><span宋体'"><em>提示信息
</em></span><span宋体'"><em></em></span><span><em>* </em></span><span><em>@param </em></span><span><em>array $data </em></span><span宋体'"><em>数据
</em></span><span宋体'"><em></em></span><span><em>* </em></span><span><em>@return </em></span><span><em>string
</em></span><span><em>         */
</em></span><span><em></em></span><span>public static function </span><span>json</span>(<span>$code</span><span>,</span><span>$message</span>=<span>''</span><span>,</span><span>$data</span>=<span>array</span>())
        {
            <span>if</span>(!is_numeric(<span>$code</span>)) <span>return </span><span>''</span><span>;
</span><span></span><span>$result </span>= <span>array</span>(
                <span>'code'</span>=><span>$code</span><span>,
</span><span></span><span>'message'</span>=><span>$message</span><span>,
</span><span></span><span>'data'</span>=><span>$data</span><span>,
</span><span></span>)<span>;
</span><span></span><span>echo </span><span>json_encode</span>(<span>$result</span>)<span>;
</span><span></span><span>exit</span><span>;
</span><span></span>}
    }
<span>?></span>

2、xml的方式封装通信接口

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方法：php生成xml数据；

首先php如何生成xml数据，总结有两种方法：

1.组装成xml字符串；

2.使用系统类（DomDocument、XMLWriter、SimpleXML）；

<span><?php
</span><span>    class </span>Response
    {
        
        <span><em>/**
</em></span><span><em>         * </em></span><span宋体'"><em>按</em></span><span><em>xml</em></span><span宋体'"><em>方式输出通信数据
</em></span><span宋体'"><em></em></span><span><em>* </em></span><span><em>@param </em></span><span><em>int $code </em></span><span宋体'"><em>状态码
</em></span><span宋体'"><em></em></span><span><em>* </em></span><span><em>@param </em></span><span><em>string $message </em></span><span宋体'"><em>提示信息
</em></span><span宋体'"><em></em></span><span><em>* </em></span><span><em>@param </em></span><span><em>array $data </em></span><span宋体'"><em>数据
</em></span><span宋体'"><em></em></span><span><em>* </em></span><span><em>@return </em></span><span><em>void
</em></span><span><em>         */
</em></span><span><em></em></span><span>public static function </span><span>xmlEncode</span>(<span>$code</span><span>,</span><span>$message</span>=<span>''</span><span>,</span><span>$data</span>=<span>array</span>())
        {
            <span>$r </span>= <span>''</span><span>;
</span><span></span><span>if</span>(!is_numeric(<span>$code</span>)) <span>$r </span>= <span>''</span><span>;
</span><span></span><span>$result </span>= <span>array</span>(
                <span>'code'</span>=><span>$code</span><span>,
</span><span></span><span>'message'</span>=><span>$message</span><span>,
</span><span></span><span>'data'</span>=><span>$data</span><span>,
</span><span></span>)<span>;
</span><span></span><span></span>header(<span>"Content-Type:text/xml"</span>)<span>;
</span><span></span><span>$xml </span>= <span>"<?xml version='1.0' encoding='UTF-8'?></span><span>\n</span><span>"</span><span>;
</span><span></span><span>$xml </span>.= <span>"<root></span><span>\n</span><span>"</span><span>;
</span><span></span><span>$xml </span>.= <span>self</span>::<span><em>xmlToEncode</em></span>(<span>$result</span>)<span>;
</span><span></span><span>$xml </span>.= <span>"</root>"</span><span>;
</span><span></span><span>$r </span>= <span>$xml</span><span>;
</span><span></span><span>echo </span><span>$r</span><span>;
</span><span></span>}

        <span>public static function </span><span>xmlToEncode</span>(<span>$data</span>)
        {
            <span>$xml </span>= <span>$attr </span>= <span>""</span><span>;
</span><span></span><span>foreach</span>(<span>$data </span><span>as </span><span>$key</span>=><span>$value</span>)
            {
                <span>if</span>(is_numeric(<span>$key</span>))
                {
                    <span>$attr </span>= <span>"id='</span>{<span>$key</span>}<span>'"</span><span>;
</span><span></span><span>$key </span>= <span>'item'</span><span>;
</span><span></span>}
                <span>$xml </span>.= <span>"<</span>{<span>$key</span>} {<span>$attr</span>}<span>>"</span><span>;
</span><span></span><span>$xml </span>.= is_array(<span>$value</span>)?<span>self</span>::<span><em>xmlToEncode</em></span>(<span>$value</span>):<span>$value</span><span>;
</span><span></span><span>$xml </span>.= <span>"</</span>{<span>$key</span>}<span>></span><span>\n</span><span>"</span><span>;
</span><span></span>}
            <span>return </span><span>$xml</span><span>;
</span><span></span>}
    }

<span>?></span>