ip2long

实例

将 IPv4 地址转换为长整数：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$ip</span> <span class="token operator">=</span> <span class="token function">gethostbyname</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"www.gitbox.net"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token variable">$out</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"以下URL是等价的：<br>"</span><span class="token punctuation">;</span>
<span class="token variable">$out</span> <span class="token operator">.=</span> <span class="token string double-quoted-string">"https://www.gitbox.net/, https://"</span> <span class="token operator">.</span> <span class="token variable">$ip</span> <span class="token operator">.</span> <span class="token string double-quoted-string">"/, and https://"</span> <span class="token operator">.</span> <span class="token function">sprintf</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"%u"</span><span class="token punctuation">,</span> <span class="token function">ip2long</span><span class="token punctuation">(</span><span class="token variable">$ip</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">.</span> <span class="token string double-quoted-string">"/"</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token variable">$out</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>