获得用户的IP代码,PHP代码库,德仔网

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【PHP】获得用户的IP
作者: / 发布于2011/1/4/ 330
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            <pre style="line-height: 150%; font-family: Verdana, Monospace; font-size: 12px; font-weight: bold; margin-right: 10px"><span style="color: #0000ff">function</span> get_clientip<span style="color: #009900">(</span><span style="color: #009900">)</span><span style="color: #009900">{</span>
  <span style="color: #0099cc">if</span><span style="color: #009900">(</span><span style="color: blue">isset</span><span style="color: #009900">(</span><span style="color: #000088">$_SERVER</span><span style="color: #009900">)</span><span style="color: #009900">)</span><span style="color: #009900">{</span>
    <span style="color: #0099cc">if</span><span style="color: #009900">(</span><span style="color: blue">isset</span><span style="color: #009900">(</span><span style="color: #000088">$_SERVER</span><span style="color: #009900">[</span><span style="color: #0000ff">'HTTP_X_FORWARDED_FOR'</span><span style="color: #009900">]</span><span style="color: #009900">)</span><span style="color: #009900">)</span><span style="color: #009900">{</span>
      <span style="color: #000088">$realip</span> <span style="color: #339933">=</span> <span style="color: #000088">$_SERVER</span><span style="color: #009900">[</span><span style="color: #0000ff">'HTTP_X_FORWARDED_FOR'</span><span style="color: #009900">]</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span><span style="color: #0099cc">elseif</span> <span style="color: #009900">(</span><span style="color: blue">isset</span><span style="color: #009900">(</span><span style="color: #000088">$_SERVER</span><span style="color: #009900">[</span><span style="color: #0000ff">'HTTP_CLIENT_IP'</span><span style="color: #009900">]</span><span style="color: #009900">)</span><span style="color: #009900">)</span><span style="color: #009900">{</span>
      <span style="color: #000088">$realip</span> <span style="color: #339933">=</span> <span style="color: #000088">$_SERVER</span><span style="color: #009900">[</span><span style="color: #0000ff">'HTTP_CLIENT_IP'</span><span style="color: #009900">]</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span><span style="color: #0099cc">else</span><span style="color: #009900">{</span>
      <span style="color: #000088">$realip</span> <span style="color: #339933">=</span> <span style="color: #000088">$_SERVER</span><span style="color: #009900">[</span><span style="color: #0000ff">'REMOTE_ADDR'</span><span style="color: #009900">]</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span>
  <span style="color: #009900">}</span><span style="color: #0099cc">else</span><span style="color: #009900">{</span>
    <span style="color: #0099cc">if</span><span style="color: #009900">(</span><span style="color: blue">getenv</span><span style="color: #009900">(</span><span style="color: #0000ff">'HTTP_X_FORWARDED_FOR'</span><span style="color: #009900">)</span><span style="color: #009900">)</span><span style="color: #009900">{</span>
      <span style="color: #000088">$realip</span> <span style="color: #339933">=</span> <span style="color: blue">getenv</span><span style="color: #009900">(</span> <span style="color: #0000ff">'HTTP_X_FORWARDED_FOR'</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span><span style="color: #0099cc">elseif</span><span style="color: #009900">(</span><span style="color: blue">getenv</span><span style="color: #009900">(</span><span style="color: #0000ff">'HTTP_CLIENT_IP'</span><span style="color: #009900">)</span><span style="color: #009900">)</span><span style="color: #009900">{</span>
      <span style="color: #000088">$realip</span> <span style="color: #339933">=</span> <span style="color: blue">getenv</span><span style="color: #009900">(</span><span style="color: #0000ff">'HTTP_CLIENT_IP'</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span><span style="color: #0099cc">else</span><span style="color: #009900">{</span>
      <span style="color: #000088">$realip</span> <span style="color: #339933">=</span> <span style="color: blue">getenv</span><span style="color: #009900">(</span><span style="color: #0000ff">'REMOTE_ADDR'</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span>
  <span style="color: #009900">}</span>
  <span style="color: #0099cc">return</span> <span style="color: #000088">$realip</span><span style="color: #339933">;</span>
<span style="color: #009900">}</span></pre>
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