echo函数与print_r函数对比：如何选择合适的PHP输出函数？

<span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// 文章前无关代码示例</span></span><span>
</span><span><span class="hljs-function"><span class="hljs-keyword">function</span></span></span><span> </span><span><span class="hljs-title">dummyFunction</span></span><span>(</span><span><span class="hljs-params"></span></span><span>) {
    </span><span><span class="hljs-keyword">return</span></span><span> </span><span><span class="hljs-string">"This is unrelated code before the article content."</span></span><span>;
}

</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-title function_ invoke__">dummyFunction</span></span><span>();

</span><span><span class="hljs-meta">?></span></span><span>

<hr>

</span><span><span class="hljs-meta"><?php</span></span><span>
<span class="hljs-comment">/**
 * 文章正文开始
 * 标题：echo函数与print_r函数对比：如何选择合适的PHP输出函数？
 */</span>

</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<h1>echo函数与print_r函数对比：如何选择合适的PHP输出函数？</h1>"</span></span><span>;

</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<p>在PHP开发中，数据输出是非常常见的需求。PHP提供了多种输出方式，其中<code>echo

<span class="fun">print_r(\$array);\nprint_r(\$object);</span>

<span class="fun">// 使用 echo 输出\n\$name = 'Alice';\necho \$name;  // 输出: Alice\n\n// 使用 print_r 输出\n\$arr = ['apple', 'banana', 'cherry'];\nprint_r(\$arr);\n/* 输出:\nArray\n(\n    [0] => apple\n    [1] => banana\n    [2] => cherry\n)\n*/</span>