{"id":202318,"date":"2025-05-10T09:03:08","date_gmt":"2025-05-10T01:03:08","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202318\/"},"modified":"2025-05-10T09:03:08","modified_gmt":"2025-05-10T01:03:08","slug":"redis%e4%b8%ad%e7%9a%84bitmap%e5%ae%9e%e4%be%8b%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202318\/","title":{"rendered":"redis\u4e2d\u7684bitmap\u5b9e\u4f8b\u5206\u6790"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>redis\u4e2d\u7684bitmap\u5b9e\u4f8b\u5206\u6790<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u5728IT\u884c\u4e1a\u8fd9\u4e2a\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u5f88\u5feb\u7684\u884c\u4e1a\uff0c\u53ea\u6709\u4e0d\u505c\u6b62\u7684\u5b66\u4e60\uff0c\u624d\u4e0d\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u5982\u679c\u4f60\u662f\u6570\u636e\u5e93\u5b66\u4e60\u8005\uff0c\u90a3\u4e48\u672c\u6587\u300aredis\u4e2d\u7684bitmap\u5b9e\u4f8b\u5206\u6790\u300b\u5c31\u5f88\u9002\u5408\u4f60\uff01\u672c\u7bc7\u5185\u5bb9\u4e3b\u8981\u5305\u62ec##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<h3>1\u3001BitMap\u662f\u4ec0\u4e48<\/h3>\n<p>\u901a\u8fc7\u4e00\u4e2abit\u4f4d\u6765\u8868\u793a\u67d0\u4e2a\u5143\u7d20\u5bf9\u5e94\u7684\u503c\u6216\u8005\u72b6\u6001,\u5176\u4e2d\u7684key\u5c31\u662f\u5bf9\u5e94\u5143\u7d20\u672c\u8eab\u3002\u6211\u4eec\u77e5\u90538\u4e2abit\u53ef\u4ee5\u7ec4\u6210\u4e00\u4e2aByte\uff0c\u6240\u4ee5bitmap\u672c\u8eab\u4f1a\u6781\u5927\u7684\u8282\u7701\u50a8\u5b58\u7a7a\u95f4\u30022^32\u6b21\u65b940\u4ebf\u6570\u636e\u53ea\u9700\u8981500M\u5185\u5b58\uff0c\u9700\u8981\u5185\u5b58\u5c11\u4e868\u500d<\/p>\n<h3>2\u3001setbit\u547d\u4ee4\u4ecb\u7ecd&nbsp;<\/h3>\n<pre>setbit&nbsp;key&nbsp;offset&nbsp;value\n&nbsp;#\u8bbe\u7f6ebitmapkey\u4e3a20220328&nbsp;&nbsp;uid\u4e3a100\u7684\u7528\u6237\u5df2\u7b7e\u52301\nsetbit&nbsp;&nbsp;20220320&nbsp;&nbsp;100&nbsp;1&nbsp;\nsetbit&nbsp;&nbsp;20220320&nbsp;&nbsp;200&nbsp;1\n&nbsp;setbit&nbsp;&nbsp;20220321&nbsp;&nbsp;100&nbsp;1\nsetbit&nbsp;&nbsp;20220321&nbsp;&nbsp;300&nbsp;1\n&nbsp;&nbsp;getbit&nbsp;20220320&nbsp;&nbsp;100&nbsp;&nbsp;#\u8fd4\u56de1,\u8bf4\u660e\u8fd9\u4e2a\u7528\u6237\u5df2\u7b7e\u5230\u4e86\n&nbsp;&nbsp;bitcount&nbsp;20220320&nbsp;&nbsp;#\u83b7\u53d6bitmap\u6570\u91cf<\/pre>\n<p><strong>bitmap\u7684\u5751<\/strong><\/p>\n<pre>127.0.0.1:6400&gt;&nbsp;setbit&nbsp;bittest&nbsp;100&nbsp;1&nbsp;#\u8bbe\u7f6e\u4e0d\u5b58\u5728\u7684offset\u8fd4\u56de0\n(integer)&nbsp;0\n127.0.0.1:6400&gt;&nbsp;setbit&nbsp;bittest&nbsp;100&nbsp;1&nbsp;#\u8bbe\u7f6e\u5df2\u5b58\u5728\u7684offset\u8fd4\u56de1\n(integer)&nbsp;1<\/pre>\n<p><strong>setbit maxKey 4000000000 1 #\u76f4\u63a5\u5f04\u4e86\u4f60600\u591aM\u5185\u5b58<\/strong><\/p>\n<pre>\/**\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;\u5e03\u9686\u8fc7\u6ee4\u5668bloom&nbsp;Filter\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;1.\u767e\u4e07\u5206\u4e4b\u4e00\u7684\u6982\u7387\u54c8\u5e0c\u51b2\u7a81,\u6240\u4ee5\u6709\u5b58\u5728\u7684\u4e0d\u4e00\u5b9a\u5b58\u5728\uff0c\u4f46\u662f\u4e0d\u5b58\u5728\u7684\u767e\u5206\u767e\u4e0d\u5b58\u5728\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;2.\u4e0d\u80fd\u5220\u9664,\u5220\u9664\u7684\u65f6\u5019\u4e0d\u80fd\u7b80\u5355\u7684\u76f4\u63a5\u7f6e\u4e3a0,\u53ef\u80fd\u4f1a\u5f71\u54cd\u5176\u4ed6\u5143\u7d20\u7684\u5224\u65ad,\u5176\u5b9e\u95ee\u9898\u4e0d\u5927\u4e00\u822c\u751f\u4ea7\u6570\u636e\u4e5f\u4e0d\u4f1a\u5220\u9664\u7684,\u90fd\u662f\u8f6f\u5220\u9664\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;3.\u65b0\u589e\u6570\u636e\u65f6\u5019\u5199\u5165bloom&nbsp;Filter\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;4.2^32\u6b21\u65b940\u4ebf\u6570\u636e\u5185\u5b58\u5360\u7528\u624d600M,\u8d85\u7ea7\u7701\u5185\u5b58,\u67e5\u627e\u901f\u5ea6\u975e\u5e38\u5feb,160M\u5185\u5b58\u53ef\u4ee5\u5728\u5343\u4e07\u7ea7\u6570\u636e\u505a\u52301%\u7684\u8bef\u5224\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;5.bitmap\u6839\u636eoffset\u53bb\u7533\u8bf7\u5185\u5b58\u7684,\u6240\u4ee5\u8981\u7701\u5185\u5b58\u7684\u60c5\u51b5\u8981\u9650\u5236offset\u503c\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*\/\n&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;function&nbsp;bloomAction(){\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$t1&nbsp;=&nbsp;time();\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for($i=0;$i&lt;99;$i++){\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$bl&nbsp;=&nbsp;new&nbsp;BloomFilter();\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/$str&nbsp;=&nbsp;\"1https:\/\/arnaud.le-blanc.net\/php-rdkafka-doc\/phpdoc\/book.rdkafka.html?id=\".time();\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$str&nbsp;=&nbsp;\"https:\/\/dasda.le-blanc.net\/php-rdkafka-doc\/phpdoc\/book.rdkafka.html?id=\".mt_rand(1,99999999);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;p($str);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$res1&nbsp;=&nbsp;$bl-&gt;JSHash($str);\/\/\u4e24\u6b21\u54c8\u5e0c3s,md5\u54c8\u5e0c\u91cd\u590d\u7684\u6982\u7387\u662f\u767e\u4e07\u5206\u4e4b\u4e00\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;p($res1);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/p($res);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$t2&nbsp;=&nbsp;time();\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;$t2-$t1;\n&nbsp;&nbsp;&nbsp;&nbsp;}\n&nbsp;&nbsp;&nbsp;&nbsp;\/**\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;\u5e03\u9686\u8fc7\u6ee4\u5668\u521d\u59cb\u5316&nbsp;bloom&nbsp;Filter&nbsp;\u6267\u884c&nbsp;php&nbsp;&nbsp;index.php&nbsp;\"index\/demo\/loadDb2bloom\"\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*\/\n&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;function&nbsp;isExistBloomAction(){\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$redis&nbsp;=&nbsp;redisCursor();\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$email&nbsp;=&nbsp;input(\"email\",\"\",\"trim\");\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$tel&nbsp;&nbsp;&nbsp;=&nbsp;input(\"tel\",\"\");\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$result&nbsp;=&nbsp;false;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$msg&nbsp;&nbsp;&nbsp;&nbsp;=&nbsp;\"\";\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if(filter_var($email,FILTER_VALIDATE_EMAIL)){\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$key1&nbsp;&nbsp;=&nbsp;\"bloom_user_email\";\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$offset&nbsp;=&nbsp;BloomFilter::JSHash($email);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$result&nbsp;=&nbsp;$redis-&gt;getbit($key1,$offset);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$msg&nbsp;=&nbsp;$email;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}elseif($tel){\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$key2&nbsp;&nbsp;=&nbsp;\"bloom_user_telephone\";\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$offset&nbsp;=&nbsp;BloomFilter::JSHash($tel);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$result&nbsp;=&nbsp;$redis-&gt;getbit($key2,$offset);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$msg&nbsp;=&nbsp;$tel;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$result?apiSuccess($msg.\",\u5df2\u5b58\u5728\"):apiError($msg.\",\u4e0d\u5b58\u5728\");\n&nbsp;&nbsp;&nbsp;&nbsp;}\n&nbsp;&nbsp;&nbsp;&nbsp;\/**\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;\u5e03\u9686\u8fc7\u6ee4\u5668\u521d\u59cb\u5316&nbsp;bloom&nbsp;Filter&nbsp;\u6267\u884c&nbsp;php&nbsp;&nbsp;index.php&nbsp;\"index\/demo\/loadDb2bloom\"\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*\/\n&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;function&nbsp;loadDb2bloomAction(){\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$time1&nbsp;=&nbsp;time();\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$redis&nbsp;=&nbsp;redisCursor();\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$key1&nbsp;=&nbsp;\"bloom_user_email\";\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$key2&nbsp;=&nbsp;\"bloom_user_telephone\";\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/setbit()&nbsp;offset&nbsp;\u5fc5\u987b\u662f\u6570\u5b57,value\u5fc5\u987b\u662f1\u62160\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/$redis-&gt;setbit($key,30,1);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$table&nbsp;&nbsp;=&nbsp;\"user\";\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$pkid&nbsp;&nbsp;&nbsp;=&nbsp;\"id\";\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$field1&nbsp;=&nbsp;\"email\";\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$field2&nbsp;=&nbsp;\"telephone\";\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$maxid&nbsp;=&nbsp;Db::name($table)-&gt;max($pkid);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$size&nbsp;&nbsp;=&nbsp;5000;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$page&nbsp;&nbsp;=&nbsp;ceil($maxid\/$size);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for($i=0;$i&lt;$page;$i++){\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$start&nbsp;=&nbsp;$i*$size;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$where&nbsp;=&nbsp;\"&nbsp;$pkid&nbsp;between&nbsp;\".$start.\"&nbsp;&nbsp;and&nbsp;\".($start+$size);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$res&nbsp;=&nbsp;Db::name($table)-&gt;where($where)-&gt;field(\"$field1,$field2\")-&gt;select();\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if($res){\/\/\u540c\u6b65\u5230bitmap\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;foreach($res&nbsp;as&nbsp;$k=&gt;$v){\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/\u5e03\u9686\u8fc7\u6ee4\u5668&nbsp;&nbsp;1.\u5b58\u5728\u7684\u4e0d\u4e00\u5b9a\u5b58\u5728,&nbsp;2.\u4e0d\u5b58\u5728\u7684100%\u4e0d\u5b58\u5728(\u539f\u56e0,\u54c8\u5e0c\u51b2\u7a81\u53ef\u80fd\u7528100W\u5206\u4e4b\u4e00\u7684\u53ef\u80fd\u91cd\u590d)\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/\u6240\u4ee5\u6ce8\u518c\u7684\u65f6\u5019\u5224\u65ad\u4e0d\u5b58\u5728\u7684,\u767e\u5206\u767e\u53ef\u4ee5\u6ce8\u518c\uff0c\u5b58\u5728\u7684\u53ef\u4ee5\u67e5\u8be2\u4e00\u4e0b\u6570\u636e\u5e93\u662f\u5426\u771f\u7684\u4e0d\u5b58\u5728\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$value1&nbsp;=&nbsp;BloomFilter::JSHash($v[\"$field1\"]);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$value2&nbsp;=&nbsp;BloomFilter::JSHash($v[\"$field2\"]);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$redis-&gt;setbit($key1,$value1,1);\/\/email\u53bb\u91cd\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$redis-&gt;setbit($key2,$value2,1);\/\/mobile\u53bb\u91cd\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$time2&nbsp;=&nbsp;time();\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;$where.\"&nbsp;\u6d88\u8017\u65f6\u95f4&nbsp;\".($time2-$time1).PHP_EOL;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$time3&nbsp;=&nbsp;time();\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;\"&nbsp;\u603b\u6d88\u8017\u65f6\u95f4&nbsp;\".($time3-$time1).PHP_EOL;\n&nbsp;&nbsp;&nbsp;&nbsp;}<\/pre>\n<pre>&lt;?php\n&nbsp;class&nbsp;BloomFilter\n{\n&nbsp;&nbsp;&nbsp;&nbsp;\/**\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;\u4e0b\u9762\u7684\u54c8\u5e0c\u51fd\u6570\u968f\u4fbf\u7528\u4e00\u4e2a\u90fd\u884c,\u90fd\u662f\u628a\u5b57\u7b26\u4e32\u8f6c\u6362\u6210\u6570\u5b57\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*\/\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/**\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;hash\u65b9\u6cd5\u7c7b\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;\u7531Justin&nbsp;Sobel\u7f16\u5199\u7684\u6309\u4f4d\u6563\u5217\u51fd\u6570\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;update\uff1aDenny\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;\u8fd4\u56de\u4e4b\u524d\u505a\u4e86\u5185\u5b58\u9650\u5236\u5728160M,\u8d85\u8fc710\u4ebf\u7684\u54c8\u5e0c\u540e\u7684\u6570\u503c,\u628a\u5b83\u9650\u5236\u572810\u4ebf\u5185,\u6b64\u65f61000W\u7684\u6570\u636e\u53ef\u505a\u52301%\u8bef\u5224,\u5185\u5b58\u4e0d\u5dee\u8fd9600\u591aM\u7684\u8bdd\u5c31\u522b\u9650\u5236\u4e86\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;\u56e0\u4e3aredis\u7684bitmap\u7533\u8bf7\u5185\u5b58\u662f\u770boffset\u7533\u8bf7\u5185\u5b58\u7684,setbit&nbsp;mykey&nbsp;400000000&nbsp;1\uff0c\u8fd9\u6837\u76f4\u63a5\u7533\u8bf7\u4e86600M\u5185\u5b58\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*\/\n&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;static&nbsp;function&nbsp;JSHash($string,&nbsp;$limitMemory=true,$len&nbsp;=&nbsp;null)\n&nbsp;&nbsp;&nbsp;&nbsp;{\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$hash&nbsp;=&nbsp;1315423911;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$len&nbsp;||&nbsp;$len&nbsp;=&nbsp;strlen($string);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for($i&nbsp;=&nbsp;0;&nbsp;$i&nbsp;&lt;&nbsp;$len;&nbsp;$i++)\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$hash&nbsp;^=&nbsp;(($hash&nbsp;&lt;&lt;&nbsp;5)&nbsp;+&nbsp;ord($string[$i])&nbsp;+&nbsp;($hash&nbsp;&gt;&gt;&nbsp;2));\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$hashNum&nbsp;=&nbsp;($hash&nbsp;%&nbsp;0xFFFFFFFF)&nbsp;&amp;&nbsp;0xFFFFFFFF;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/\u4e3a\u4e86\u8282\u7701\u5185\u5b58,\u8d85\u8fc710\u4ebf\u5c31\u5bf9\u534a\u62c6,10\u4ebf,\u8fd9\u65f6\u5019\u5927\u7ea6\u662f130M\u5185\u5b58\u5360\u7528,\u5343\u4e07\u7ea7\u6570\u636e\u53ef\u4ee5\u505a\u52301%\u8bef\u5224\u7387,\u5185\u5b58\u8db3\u591f\u53ef\u4ee5\u4e0d\u7528\u5224\u65ad,\u76f4\u63a5\u751f\u6210\u5c31\u884c\u4e86\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/\u5982\u679c\u6570\u636e\u8fc74000W\u7684\u8bdd\u4e0d\u7528\u9650\u5236\u4e86,\u56e0\u4e3a\u751f\u6210\u7684\u6570\u636e\u6700\u5927\u4e5f\u662f2^32\u6b21\u65b940\u591a\u4ebf,\u6b64\u65f6\u5185\u5b58\u5360\u7528\u5927\u6982\u5728600M\u5c01\u9876\u4e86\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if($limitMemory){\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if($hashNum&gt;4000000000){\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$hashNum&nbsp;=&nbsp;intval($hashNum\/5);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}elseif($hashNum&gt;3000000000){\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$hashNum&nbsp;=&nbsp;intval($hashNum\/4);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}elseif($hashNum&gt;2000000000){\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$hashNum&nbsp;=&nbsp;intval($hashNum\/3);\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;$hashNum;\n&nbsp;&nbsp;&nbsp;&nbsp;}\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>redis\u4e2d\u7684bitmap\u5b9e\u4f8b\u5206&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-202318","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202318","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=202318"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202318\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202318"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}