mysqli_stmt::result_metadata函数返回false的常见原因有哪些？怎么解决？

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</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<h1>mysqli_stmt::result_metadata函数返回false的常见原因有哪些？怎么解决？</h1>"</span></span><span>;

</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<p>在使用PHP的MySQLi扩展进行预处理语句操作时，<code>mysqli_stmt::result_metadata

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