checkdnsrr

实例

检查 DNS 记录：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$domain</span><span class="token operator">=</span><span class="token string double-quoted-string">"gitbox.net"</span><span class="token punctuation">;</span>
<span class="token keyword">if</span><span class="token punctuation">(</span><span class="token function">checkdnsrr</span><span class="token punctuation">(</span><span class="token variable">$domain</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"MX"</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">echo</span> <span class="token string double-quoted-string">"Passed"</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
  <span class="token keyword">echo</span> <span class="token string double-quoted-string">"Failed"</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token delimiter important">?></span></span>