php 用户验证 base64验证方法
function dsetcookie( $var , $value , $life = 0, $prefix = 1) { global $cookiedomain , $cookiepath , $addtime , $_server ; setcookie( $var , $value , $life ? $addtime + $life : 0, $cookiepath , $cookiedomain , $_server [ 'server_port' ] == 443 ? 1 : 0); } function authcode( $string , $operation = 'decode' , $key = '' , $expiry = 0) { global $webaddr ; $auth_key =md5( $webaddr ); $ckey_length = 4; $key = md5( $key ? $key : $auth_key ); $keya = md5( substr ( $key , 0, 16)); $keyb = md5( substr ( $key , 16, 16)); $keyc = $ckey_length ? ( $operation == 'decode' ? substr ( $string , 0, $ckey_length ): substr (md5(microtime()), - $ckey_length )) : '' ; $cryptkey = $keya .md5( $keya . $keyc ); $key_length = strlen ( $cryptkey ); $string = $operation == 'decode' ? base64_decode ( substr ( $string , $ckey_length )) : sprintf( '%010d' , $expiry ? $expiry + time() : 0). substr (md5( $string . $keyb ), 0, 16). $string ; $string_length = strlen ( $string ); $result = '' ; $box = range(0, 255); $rndkey = array (); for ( $i = 0; $i <= 255; $i ++) { $rndkey [ $i ] = ord( $cryptkey [ $i % $key_length ]); } for ( $j = $i = 0; $i < 256; $i ++) { $j = ( $j + $box [ $i ] + $rndkey [ $i ]) % 256; $tmp = $box [ $i ]; $box [ $i ] = $box [ $j ]; $box [ $j ] = $tmp ; } for ( $a = $j = $i = 0; $i < $string_length ; $i ++) { $a = ( $a + 1) % 256; $j = ( $j + $box [ $a ]) % 256; $tmp = $box [ $a ]; $box [ $a ] = $box [ $j ]; $box [ $j ] = $tmp ; $result .= chr (ord( $string [ $i ]) ^ ( $box [( $box [ $a ] + $box [ $j ]) % 256])); } if ( $operation == 'decode' ) { if (( substr ( $result , 0, 10) == 0 || substr ( $result , 0, 10) - time() > 0) && substr ( $result , 10, 16) == substr (md5( substr ( $result , 26). $keyb ), 0, 16)) { //开源代码phpfensi.com return substr ( $result , 26); } else { return '' ; } } else { return $keyc . str_replace ( '=' , '' , base64_encode ( $result )); } }查看更多关于php 用户验证 base64验证方法 - php函数的详细内容...
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