dns_check_record
checkdnsrrのエイリアス
DNSレコードを確認してください:
<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">dns_check_record</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">"by"</span> <span class="token punctuation">;</span> <span class="token punctuation">}</span><span class="token keyword">それ以外</span><span class="token punctuation">{</span> <span class="token keyword">エコー</span><span class="token string double-quoted-string">「失敗」</span> <span class="token punctuation">。</span> <span class="token punctuation">}</span> <span class="token delimiter important">?></span></span>