{"id":630,"date":"2014-06-17T14:59:12","date_gmt":"2014-06-17T05:59:12","guid":{"rendered":"http:\/\/bellsprite.com\/?p=630"},"modified":"2014-06-17T15:28:00","modified_gmt":"2014-06-17T06:28:00","slug":"%e7%ae%80%e5%8d%95%e7%9a%84%e4%bb%8euserid%e6%b1%82","status":"publish","type":"post","link":"https:\/\/bellsprite.com\/?p=630","title":{"rendered":"\u4e00\u4e2a\u6df7\u6dc6\u6570\u5b57userid\u7684\u7b80\u5355\u65b9\u6cd5"},"content":{"rendered":"

\/*\u00a0<\/p>\n

\u4e00\u4e2a\u6df7\u6dc6\u6570\u5b57userid\u7684\u7b80\u5355\u65b9\u6cd5<\/p>\n

\u6548\u679c\u662f encode: 1234 =>\u00a048915174<\/p>\n

decode :\u00a048915174 => 1234<\/p>\n

*\/\u00a0<\/p>\n

function encodeNumber( $number, $modulo, $prime ){
\u00a0 \u00a0 return ( $number * $prime ) & $modulo; \/\/ &\u64cd\u4f5c\u7b49\u4ef7\u4e8e\u53d6\u6a21
}<\/p>\n

function decodeNumber( $code, $modulo, $primeInverse ){
\u00a0 \u00a0\u00a0return ( $code * $primeInverse ) & $modulo; \/\/ &\u64cd\u4f5c\u7b49\u4ef7\u4e8e\u53d6\u6a21
}<\/p>\n

\/\/ \u4f8b\uff1a
\/\/ magic number \u53ef\u4ee5\u7528\u5728\u7ebf\u5de5\u5177\u4e8b\u5148\u7b97\u51fa\u6765 http:\/\/planetcalc.com\/3311\/<\/a>
$modulo = pow( 2, 26 ) – 1;
$prime = 7381371;
$primeInverse = 5555;<\/p>\n

$id = 1234;
function show( $number ){
\u00a0 \u00a0\u00a0global $modulo, $prime, $primeInverse;
\u00a0 \u00a0\u00a0$encoded = encodeNumber( $number, $modulo, $prime );
\u00a0 \u00a0\u00a0$decoded = decodeNumber( $encoded, $modulo, $primeInverse );
\u00a0 \u00a0\u00a0print_r( [\u00a0
\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0“id” => $number,\u00a0
\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0“encoded” => $encoded,
\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0“decoded” => $decoded,
\u00a0 \u00a0\u00a0] );
}
show( $id );<\/p>\n

—————- \u00a0\u4ee3\u7801\u6587\u5b57\u5206\u9694\u7ebf \u00a0—————-<\/p>\n

\u6709\u5174\u8da3\u53ef\u4ee5\u5728\u00a0http:\/\/www.compileonline.com\/execute_php_online.php<\/a>\u00a0\u4e0a\u6f14\u7ec3\u4e00\u4e0b\uff0c\u590d\u5236\u7c98\u8d34\u5c31\u597d\u3002<\/p>\n

\u7b80\u5355\u4ecb\u7ecd\u4e00\u4e0b\u3002<\/p>\n

\u51fa\u5904\u662f\u8fd9\u91cc<\/a>\uff0c\u6211\u662f\u4ecestackoverflow<\/a>\u4e0a\u770b\u6765\u7684\u3002\u539f\u7406\u662f\u5229\u7528\u6a21\u9006\u5143\u7d20\u7684\u7279\u6027\uff0cblablabla\u3002
\u6a21\u75282\u7684\u5e42\u51cf1\u662f\u4e3a\u4e86\u6c42\u6a21\u8ba1\u7b97\u7684\u6548\u7387\u3002<\/p>\n

\u9650\u5236\u662f\u53ef\u4ee5\u6df7\u6dc6\u7684\u6570\u5b57\u4e0d\u80fd\u5927\u4e8e\u6a21\uff0c\u5426\u5219\u7f16\u7801\u540e\u7684\u6570\u503c\u4f1a\u6709\u91cd\u590d\uff0c\u6216\u8005\u8bf4\u4f1a\u4ece\u5934\u5f00\u59cb\u65b0\u4e00\u8f6e\u5faa\u73af\u3002
\u53e6\u5916\u8fd9\u6bd5\u7adf\u4e0d\u662f\u52a0\u5bc6\uff0c\u7528\u9014\u7c7b\u4f3cbase64\u5427\uff0c\u4e0d\u8fc7\u4e0d\u4f1a\u50cfbase64\u90a3\u6837\u4e00\u773c\u88ab\u4eba\u8bc6\u7834\u7136\u540e\u88ab\u8f7b\u6613\u89e3\u8bfb\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\/*\u00a0 \u4e00\u4e2a\u6df7\u6dc6\u6570\u5b57userid\u7684\u7b80\u5355\u65b9\u6cd5 \u6548\u679c\u662f encode: 1234 =>\u00a048915174 d […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-630","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"views":6924,"_links":{"self":[{"href":"https:\/\/bellsprite.com\/index.php?rest_route=\/wp\/v2\/posts\/630","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bellsprite.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bellsprite.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bellsprite.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bellsprite.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=630"}],"version-history":[{"count":8,"href":"https:\/\/bellsprite.com\/index.php?rest_route=\/wp\/v2\/posts\/630\/revisions"}],"predecessor-version":[{"id":640,"href":"https:\/\/bellsprite.com\/index.php?rest_route=\/wp\/v2\/posts\/630\/revisions\/640"}],"wp:attachment":[{"href":"https:\/\/bellsprite.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=630"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bellsprite.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=630"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bellsprite.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=630"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}