加密 解密

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<?php header('Content-type:text/html;charset=utf8');   echo "<br/>---------------61PKQ2KW1F6BIOW3加密----------------------------------<br/>"; $cmsName = "61PKQ2KW1F6BIOW3"; $key = "123456"; $cmsLen = strlen($cmsName); $keyLen = strlen($key); if ( $keyLen < $cmsLen ){     $key = str_repeat( $key, ceil( $cmsLen / $keyLen )); } echo base64_encode($cmsName ^ $key );         echo "<br/>---------------BwNjf2QEemUCcgN0eH1kBw==解密----------------------------------<br/>"; $cmsName = "BwNjf2QEemUCcgN0eH1kBw=="; $key = "123456"; $cmsLen = strlen( $cmsName ); $keyLen = strlen( $key ); if ( $keyLen < $cmsLen ){     $key = str_repeat( $key, ceil( $cmsLen / $keyLen )); } $CMSName = base64_decode( $cmsName ) ^ $key; echo $cmsName."<br/>"; echo $CMSName;           ?>