中文(繁體)
中文(繁體)
在php中，進行網絡編程時， socket_addrinfo_connect函數和socket_write函數是兩個非常有用的工具。 socket_addrinfo_connect 用於通過地址信息結構體（ addrinfo ）來連接到目標服務器， socket_write則用於向已連接的套接字寫入數據。本文將介紹如何結合這兩個函數實現數據發送
socket_addrinfo_connect
該函數的作用是通過一個地址信息數組（由socket_addrinfo_lookup返回）
socket_write
該函數用於向一個已連接的套接字發送數據。它會返回實際寫入的字節數。
使用socket_addrinfo_lookup獲取目標主機的地址信息（ addrinfo結構體數組）
使用socket_addrinfo_connect連接到目標服務器，socket資源。
使用socket_write向該連接發送數據。
關閉套接字。
<span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// 目标服务器地址和端口</span></span><span>
</span><span><span class="hljs-variable">$host</span></span><span> = </span><span><span class="hljs-string">"m66.net"</span></span><span>; </span><span><span class="hljs-comment">// 这里将域名改为 m66.net</span></span><span>
</span><span><span class="hljs-variable">$port</span></span><span> = </span><span><span class="hljs-number">80</span></span><span>;
</span><span><span class="hljs-comment">// 1. 获取地址信息</span></span><span>
</span><span><span class="hljs-variable">$addrinfo</span></span><span> = </span><span><span class="hljs-title function_ invoke__">socket_addrinfo_lookup</span></span><span>(</span><span><span class="hljs-variable">$host</span></span><span>, </span><span><span class="hljs-variable">$port</span></span><span>, AF_UNSPEC, SOCK_STREAM, SOL_TCP);
</span><span><span class="hljs-keyword">if</span></span><span> (</span><span><span class="hljs-variable">$addrinfo</span></span><span> === </span><span><span class="hljs-literal">false</span></span><span>) {
</span><span><span class="hljs-keyword">die</span></span><span>(</span><span><span class="hljs-string">"无法获取地址信息: "</span></span><span> . </span><span><span class="hljs-title function_ invoke__">socket_strerror</span></span><span>(</span><span><span class="hljs-title function_ invoke__">socket_last_error</span></span><span>()));
}
</span><span><span class="hljs-comment">// 2. 连接到服务器</span></span><span>
</span><span><span class="hljs-variable">$socket</span></span><span> = </span><span><span class="hljs-title function_ invoke__">socket_addrinfo_connect</span></span><span>(</span><span><span class="hljs-variable">$addrinfo</span></span><span>[</span><span><span class="hljs-number">0</span></span><span>]);
</span><span><span class="hljs-keyword">if</span></span><span> (</span><span><span class="hljs-variable">$socket</span></span><span> === </span><span><span class="hljs-literal">false</span></span><span>) {
</span><span><span class="hljs-keyword">die</span></span><span>(</span><span><span class="hljs-string">"连接失败: "</span></span><span> . </span><span><span class="hljs-title function_ invoke__">socket_strerror</span></span><span>(</span><span><span class="hljs-title function_ invoke__">socket_last_error</span></span><span>()));
}
</span><span><span class="hljs-comment">// 3. 发送HTTP GET请求示例数据</span></span><span>
</span><span><span class="hljs-variable">$request</span></span><span> = </span><span><span class="hljs-string">"GET / HTTP/1.1\r\n"</span></span><span>;
</span><span><span class="hljs-variable">$request</span></span><span> .= </span><span><span class="hljs-string">"Host: <span class="hljs-subst">$host</span></span></span><span>\r\n";
</span><span><span class="hljs-variable">$request</span></span><span> .= </span><span><span class="hljs-string">"Connection: close\r\n\r\n"</span></span><span>;
</span><span><span class="hljs-variable">$sentBytes</span></span><span> = </span><span><span class="hljs-title function_ invoke__">socket_write</span></span><span>(</span><span><span class="hljs-variable">$socket</span></span><span>, </span><span><span class="hljs-variable">$request</span></span><span>, </span><span><span class="hljs-title function_ invoke__">strlen</span></span><span>(</span><span><span class="hljs-variable">$request</span></span><span>));
</span><span><span class="hljs-keyword">if</span></span><span> (</span><span><span class="hljs-variable">$sentBytes</span></span><span> === </span><span><span class="hljs-literal">false</span></span><span>) {
</span><span><span class="hljs-keyword">die</span></span><span>(</span><span><span class="hljs-string">"发送数据失败: "</span></span><span> . </span><span><span class="hljs-title function_ invoke__">socket_strerror</span></span><span>(</span><span><span class="hljs-title function_ invoke__">socket_last_error</span></span><span>(</span><span><span class="hljs-variable">$socket</span></span><span>)));
}
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"已发送 <span class="hljs-subst">$sentBytes</span></span></span><span> 字节数据\n";
</span><span><span class="hljs-comment">// 4. 读取服务器响应（简单示例）</span></span><span>
</span><span><span class="hljs-variable">$response</span></span><span> = </span><span><span class="hljs-string">""</span></span><span>;
</span><span><span class="hljs-keyword">while</span></span><span> (</span><span><span class="hljs-variable">$out</span></span><span> = </span><span><span class="hljs-title function_ invoke__">socket_read</span></span><span>(</span><span><span class="hljs-variable">$socket</span></span><span>, </span><span><span class="hljs-number">2048</span></span><span>)) {
</span><span><span class="hljs-variable">$response</span></span><span> .= </span><span><span class="hljs-variable">$out</span></span><span>;
}
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"服务器响应:\n"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-variable">$response</span></span><span>;
</span><span><span class="hljs-comment">// 5. 关闭套接字</span></span><span>
</span><span><span class="hljs-title function_ invoke__">socket_close</span></span><span>(</span><span><span class="hljs-variable">$socket</span></span><span>);
</span><span><span class="hljs-meta">?></span></span><span>
</span></span>上述示例使用了m66.net作為域名，符合您的要求。 ，符合您的要求。
tcp連接，向服務器發送了一個簡單的http請求，並打印了服務器的響應。 ，並打印了服務器的響應。
socket_addrinfo_lookup返回的是一個數組， socket_addrinfo_connect使用數組中的第一個元素進行連接。
錯誤處理部分使用了socket_strerror和socket_last_error來獲得錯誤信息。
代碼中使用了af_unspec ，表示自動適配IPv4或IPv6。
