PHP根据IP地址控制访问的代码_PHP教程

<br><!--?php <BR-->$IP = $_SERVER['REMOTE_ADDR']; <br>$from = strcmp($IP,'192.168.0.0'); <br>$to = strcmp($IP,'192.168.0.255'); <br>if (!($from >= 0 && $to <= 0)) <br>echo "Access Denied"; <br>else <br>echo "Homepage"; <br>?> <br> <br>从流程上讲，这段代码首先捕获访客 IP 地址，然后判断该 IP 地址是否符合访问条件。符合则正常

<br><!--?php <BR-->if (!($from >= 0 && $to <= 0)) <br>echo "Access Denied"; <br>else <br>include('homepage.html')"; <br>?> <br> <br>当然，也可以按判断结果跳转至不同页面。跳转代码如下： <br><span style="CURSOR: pointer" onclick="doCopy('code1453')"><u></u></span> 代码如下:<pre class="brush:php;toolbar:false layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><br><!--?php <BR-->if (!($from >= 0 && $to <= 0)) <br>header('Location: http://www.gxlcms.com/404.html'); <br>else <br>header('Location: http://www.gxlcms.com/index.html'); <br>?> <br></li><li><p></p></li><li><p align="left"><span id="url" itemprop="url">http://www.bkjia.com/PHPjc/321726.html</span><span id="indexUrl" itemprop="indexUrl">www.bkjia.com</span><span id="isOriginal" itemprop="isOriginal">true</span><span id="isBasedOnUrl" itemprop="isBasedOnUrl">http://www.bkjia.com/PHPjc/321726.html</span><span id="genre" itemprop="genre">TechArticle</span><span id="description" itemprop="description">假设有 IP 地址范围 192.168.0.0~192.168.0.255，只允许此 IP 段访问的代码如下：  代码如下:</span></p><pre class="brush:php;toolbar:false layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li>?php $IP = $_SERVER['REMOTE_ADDR']; $from = strcmp($IP,'...<p></p></li><li>                    </li></ol></pre></li></ol></pre>