English
English
Alright, I will write the article directly as per your request. There will be a horizontal line separating unrelated content from the main body, and no extra prompts will be added at the end. Here’s the article:
<span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// This part is unrelated to the article content, it can be any PHP code</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"Preparing to display article content...\n"</span></span><span>;
</span><span><span class="hljs-variable">$timestamp</span></span><span> = </span><span><span class="hljs-title function_ invoke__">time</span></span><span>();
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"Current timestamp: <span class="hljs-subst">$timestamp</span></span></span><span>\n";
</span><span><span class="hljs-meta">?></span></span><span>
<p><hr></p>
<p><h1>How Does the socket_strerror Function Help You Retrieve Socket Error Messages?</h1></p>
<p><p>When using PHP for network programming, Sockets are the foundation of client-server communication. Inevitably, you will encounter errors such as connection timeouts, unreachable hosts, or insufficient permissions. To quickly diagnose these issues, PHP provides the <code></span>socket_strerror<span>()In the example above, socket_last_error() is used to fetch the last error code, which is then converted into a readable message using socket_strerror() and displayed.
<span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-variable">$host</span></span><span> = </span><span><span class="hljs-string">'127.0.0.1'</span></span><span>;
</span><span><span class="hljs-variable">$port</span></span><span> = </span><span><span class="hljs-number">9999</span></span><span>;
</span><span><span class="hljs-variable">$socket</span></span><span> = </span><span><span class="hljs-title function_ invoke__">socket_create</span></span><span>(AF_INET, SOCK_STREAM, SOL_TCP);
</span><span><span class="hljs-keyword">if</span></span><span> (</span><span><span class="hljs-variable">$socket</span></span><span> === </span><span><span class="hljs-literal">false</span></span><span>) {
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"Failed to create Socket: "</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-string">"\n"</span></span><span>;
</span><span><span class="hljs-keyword">exit</span></span><span>;
}
</span><span><span class="hljs-variable">$result</span></span><span> = @</span><span><span class="hljs-title function_ invoke__">socket_connect</span></span><span>(</span><span><span class="hljs-variable">$socket</span></span><span>, </span><span><span class="hljs-variable">$host</span></span><span>, </span><span><span class="hljs-variable">$port</span></span><span>);
</span><span><span class="hljs-keyword">if</span></span><span> (</span><span><span class="hljs-variable">$result</span></span><span> === </span><span><span class="hljs-literal">false</span></span><span>) {
</span><span><span class="hljs-variable">$errno</span></span><span> = </span><span><span class="hljs-title function_ invoke__">socket_last_error</span></span><span>(</span><span><span class="hljs-variable">$socket</span></span><span>);
</span><span><span class="hljs-variable">$errstr</span></span><span> = </span><span><span class="hljs-title function_ invoke__">socket_strerror</span></span><span>(</span><span><span class="hljs-variable">$errno</span></span><span>);
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"Connection failed, error code <span class="hljs-subst">{$errno}</span></span></span><span>, message: </span><span><span class="hljs-subst">{$errstr}</span></span><span>\n";
</span><span><span class="hljs-title function_ invoke__">socket_close</span></span><span>(</span><span><span class="hljs-variable">$socket</span></span><span>);
</span><span><span class="hljs-keyword">exit</span></span><span>;
}
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"Connection successful!\n"</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>In this example, if the server is not running or the port is unavailable, socket_connect will return false. By retrieving the error code with socket_last_error() and converting it to a detailed message with socket_strerror(), developers can diagnose issues quickly.
Using socket_strerror() makes PHP network programming errors more intuitive and easier to understand. Combined with socket_last_error(), it allows efficient capturing and handling of Socket errors, improving both robustness and maintainability of your code.
Whether in the development phase or in production, mastering socket_strerror() is an essential skill for every PHP network programmer.
<span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// Tail code unrelated to the article</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"End of article display.\n"</span></span><span>;
</span><span><span class="hljs-meta">?></span></span><span>
</span></span>
