简体中文
简体中文
<span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// 以下部分与正文无关，仅作为示例前置代码</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"PHP环境已启动\n"</span></span><span>;
</span><span><span class="hljs-variable">$dummyArray</span></span><span> = [</span><span><span class="hljs-number">1</span></span><span>, </span><span><span class="hljs-number">2</span></span><span>, </span><span><span class="hljs-number">3</span></span><span>];
</span><span><span class="hljs-keyword">foreach</span></span><span> (</span><span><span class="hljs-variable">$dummyArray</span></span><span> </span><span><span class="hljs-keyword">as</span></span><span> </span><span><span class="hljs-variable">$item</span></span><span>) {
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"前置测试数据: <span class="hljs-subst">$item</span></span></span><span>\n";
}
</span><span><span class="hljs-meta">?></span></span><span>
<hr>
</span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// 正文开始</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<h1>mysql_fetch_array 函数中，使用索引访问数据和用关联名访问数据有何区别？</h1>"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<p>在 PHP 中，<code>mysql_fetch_array()特点：
"; echo "关联名访问是使用字段名作为数组键名，例如：
"; echo "\n"</span></span><span>; </span><span><span>echo</span></span><span> </span><span><span>"姓名: "</span></span><span> . </span><span><span>$row</span></span><span>[</span><span><span>'name'</span></span><span>] . </span><span><span>"\n"</span></span><span>; </span><span><span>echo</span></span><span> </span><span><span>"年龄: "</span></span><span> . </span><span><span>$row</span></span><span>[</span><span><span>'age'</span></span><span>] . </span><span><span>"\n"</span></span><span>; </span><span><span>echo</span></span><span> </span><span><span>""; echo "
特点：
"; echo "函数原型如下：
"; echo "mysql_fetch_array(resource <span>$result</span></span></span><span>, int </span><span><span>$result_type</span></span><span> = MYSQL_BOTH)"; echo "
参数 $result_type 可以是：
"; echo "选择使用数字索引还是关联名访问主要取决于代码的可读性和维护性：
"; echo "
