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【PHP】一个简单的字符串加密解密类

作者:周国强 / 发布于2012/3/6/ 549

一个简单的字符串加密解密类

<div><?</div>
<div>class cryption {</div>
<div></div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>function en($str,$key) {</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>$ret='';</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>$str = base64_encode ($str);</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>for ($i=0; $i<=strlen($str)-1; $i++){</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>$d_str=substr($str, $i, 1);</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>$int =ord($d_str);</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>$int=$int^$key;</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>$hex=strtoupper(dechex($int));</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>$ret.=$hex;</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>}
<div><span class="Apple-tab-span" style="white-space:pre">		</span>return $ret;</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>}
<div></div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>function de($str,$key) {</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>$ret='';</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>for ($i=0; $i<=strlen($str)-1; 0){</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>$hex=substr($str, $i, 2);</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>$dec=hexdec($hex);</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>$dec=$dec^$key;</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>$ret.=chr($dec);</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>$i=$i+2;</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>}
<div><span class="Apple-tab-span" style="white-space:pre">		</span>return base64_decode($ret);</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>}
<div></div>
<div>}
<div></div>
<div>$cryption=new cryption;</div>
<div>?></div>

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　加密解密类　

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.一个简单的字符串加密解密类