{"id":269,"date":"2011-09-09T06:56:44","date_gmt":"2011-09-08T22:56:44","guid":{"rendered":"http:\/\/www.cnmiss.cn\/?p=269"},"modified":"2011-09-09T06:56:44","modified_gmt":"2011-09-08T22:56:44","slug":"php%e7%a8%8b%e5%ba%8f%e5%91%98%e6%9c%80%e5%b8%b8%e7%8a%af%e7%9a%8411%e4%b8%aamysql%e9%94%99%e8%af%af","status":"publish","type":"post","link":"https:\/\/www.cnmiss.cn\/?p=269","title":{"rendered":"PHP\u7a0b\u5e8f\u5458\u6700\u5e38\u72af\u768411\u4e2aMySQL\u9519\u8bef"},"content":{"rendered":"<p>\u3000\u3000<strong>1.\u4f7f\u7528MyISAM\u800c\u4e0d\u662fInnoDB<\/strong><\/p>\n<p>\u3000\u3000MySQL\u6709\u5f88\u591a\u6570\u636e\u5e93\u5f15\u64ce\uff0c\u4f46\u662f\u4f60\u6700\u53ef\u80fd\u78b0\u5230\u7684\u5c31\u662fMyISAM\u548cInnoDB\u3002<\/p>\n<p>\u3000\u3000MySQL\u9ed8\u8ba4\u4f7f\u7528\u7684\u662fMyISAM\u3002\u4f46\u662f\uff0c\u5f88\u591a\u60c5\u51b5\u4e0b\u8fd9\u90fd\u662f\u4e00\u4e2a\u5f88\u7cdf\u7cd5\u7684\u9009\u62e9\uff0c\u9664\u975e\u4f60\u5728\u521b\u5efa\u4e00\u4e2a\u975e\u5e38\u7b80\u5355\u6291\u6216\u5b9e\u9a8c\u6027\u7684\u6570\u636e\u5e93\u3002\u5916\u952e\u7ea6\u675f\u6216\u8005\u4e8b\u52a1\u5904\u7406\u5bf9\u4e8e\u6570\u636e\u5b8c\u6574\u6027\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u4f46MyISAM\u90fd\u4e0d\u652f\u6301\u8fd9\u4e9b\u3002\u53e6\u5916\uff0c\u5f53\u6709\u4e00\u6761\u8bb0\u5f55\u5728\u63d2\u5165\u6216\u8005\u66f4\u65b0\u65f6\uff0c\u6574\u4e2a\u6570\u636e\u8868\u90fd\u88ab\u9501\u5b9a\u4e86\uff0c\u5f53\u4f7f\u7528\u91cf\u589e\u52a0\u7684\u65f6\u5019\u8fd9\u4f1a\u4ea7\u751f\u975e\u5e38\u5dee\u7684\u8fd0\u884c\u6548\u7387\u3002<\/p>\n<p>\u3000\u3000\u7ed3\u8bba\u5f88\u7b80\u5355\uff1a\u4f7f\u7528InnoDB\u3002<\/p>\n<p>\u3000\u3000<strong>2.\u4f7f\u7528PHP\u7684mysql\u51fd\u6570<\/strong><\/p>\n<p>\u3000\u3000PHP\u81ea\u4ea7\u751f\u4e4b\u65e5\u5c31\u63d0\u4f9b\u4e86MySQL\u5e93\u51fd\u6570(or near as makes no difference)\u3002\u5f88\u591a\u5e94\u7528\u4ecd\u7136\u5728\u4f7f\u7528\u7c7b\u4f3cmysql_connect\u3001mysql_query\u3001mysql_fetch_assoc\u7b49\u7684\u51fd\u6570\uff0c\u5c3d\u7ba1PHP\u624b\u518c\u4e0a\u8bf4\uff1a<\/p>\n<p>\u3000\u3000\u5982\u679c\u4f60\u5728\u4f7f\u7528MySQL v4.1.3\u6216\u8005\u66f4\u65b0\u7248\u672c\uff0c\u5f3a\u70c8\u63a8\u8350\u4f7f\u7528\u60a8\u4f7f\u7528mysqli\u6269\u5c55\u3002<\/p>\n<p>\u3000\u3000mysqli(MySQL\u7684\u52a0\u5f3a\u7248\u6269\u5c55)\u6709\u4ee5\u4e0b\u51e0\u4e2a\u4f18\u70b9\uff1a<\/p>\n<p>\u3000\u3000\u53ef\u9009\u7684\u9762\u5411\u5bf9\u8c61\u63a5\u53e3<\/p>\n<p>\u3000\u3000prepared\u8868\u8fbe\u5f0f\uff0c\u8fd9\u6709\u5229\u4e8e\u963b\u6b62SQL\u6ce8\u5165\u653b\u51fb\uff0c\u8fd8\u80fd\u63d0\u9ad8\u6027\u80fd<\/p>\n<p>\u3000\u3000\u652f\u6301\u66f4\u591a\u7684\u8868\u8fbe\u5f0f\u548c\u4e8b\u52a1\u5904\u7406<\/p>\n<p>\u3000\u3000\u53e6\u5916\uff0c\u5982\u679c\u4f60\u60f3\u652f\u6301\u591a\u79cd\u6570\u636e\u5e93\u7cfb\u7edf\uff0c\u4f60\u8fd8\u53ef\u4ee5\u8003\u8651PDO\u3002<\/p>\n<p>\u3000\u3000<strong>3.\u6ca1\u6709\u5904\u7406\u7528\u6237\u8f93\u5165<\/strong><\/p>\n<p>\u3000\u3000\u8fd9\u6216\u8005\u53ef\u4ee5\u8fd9\u6837\u8bf4#1\uff1a\u6c38\u8fdc\u4e0d\u8981\u76f8\u4fe1\u7528\u6237\u7684\u8f93\u5165\u3002\u7528\u670d\u52a1\u5668\u7aef\u7684PHP\u9a8c\u8bc1\u6bcf\u4e2a\u5b57\u7b26\u4e32\uff0c\u4e0d\u8981\u5bc4\u5e0c\u671b\u4e0eJavaScript\u3002\u6700\u7b80\u5355\u7684SQL\u6ce8\u5165\u653b\u51fb\u4f1a\u5229\u7528\u5982\u4e0b\u7684\u4ee3\u7801\uff1a<\/p>\n<p>\u3000\u3000$username = $_POST[&#8220;name&#8221;]; $password = $_POST[&#8220;password&#8221;]; $sql = &#8220;SELECT userid FROM usertable WHERE username=&#8217;$username&#8217; AND password=&#8217;$password&#8217;;&#8221;; \/\/ run query&#8230;<\/p>\n<p>\u3000\u3000\u53ea\u8981\u5728username\u5b57\u6bb5\u8f93\u5165\u201cadmin&#8217;;&#8211;\u201d\uff0c\u8fd9\u6837\u5c31\u4f1a\u88ab\u9ed1\u5230\uff0c\u76f8\u5e94\u7684SQL\u8bed\u53e5\u5982\u4e0b\uff1a<\/p>\n<p>\u3000\u3000SELECT userid FROM usertable WHERE username=&#8217;admin&#8217;;<\/p>\n<p>\u3000\u3000\u72e1\u733e\u7684\u9ed1\u5ba2\u53ef\u4ee5\u4ee5admin\u767b\u5f55\uff0c\u4ed6\u4eec\u4e0d\u9700\u8981\u77e5\u9053\u5bc6\u7801\uff0c\u56e0\u4e3a\u5bc6\u7801\u6bb5\u88ab\u6ce8\u91ca\u6389\u4e86\u3002<\/p>\n<p>\u3000\u3000<strong>4.\u6ca1\u6709\u4f7f\u7528UTF-8<\/strong><\/p>\n<p>\u3000\u3000\u7f8e\u56fd\u3001\u82f1\u56fd\u548c\u6fb3\u5927\u5229\u4e9a\u7684\u6211\u4eec\u5f88\u5c11\u8003\u8651\u9664\u82f1\u8bed\u4e4b\u5916\u7684\u5176\u4ed6\u8bed\u8a00\u3002\u6211\u4eec\u5f88\u5f97\u610f\u5730\u5b8c\u6210\u4e86\u81ea\u5df1\u7684\u201c\u6770\u4f5c\u201d\u5374\u53d1\u73b0\u5b83\u4eec\u5e76\u4e0d\u80fd\u5728\u5176\u4ed6\u5730\u65b9\u6b63\u5e38\u8fd0\u884c\u3002<\/p>\n<p>\u3000\u3000UTF-8\u89e3\u51b3\u4e86\u5f88\u591a\u56fd\u9645\u5316\u95ee\u9898\u3002\u867d\u7136\u5728PHP v6.0\u4e4b\u524d\u5b83\u8fd8\u4e0d\u80fd\u5f88\u597d\u5730\u88ab\u652f\u6301\uff0c\u4f46\u8fd9\u5e76\u4e0d\u5f71\u54cd\u4f60\u628aMySQL\u5b57\u7b26\u96c6\u8bbe\u4e3aUTF-8\u3002<\/p>\n<p>\u3000\u3000<strong>5.\u76f8\u5bf9\u4e8eSQL\uff0c\u504f\u7231PHP<\/strong><\/p>\n<p>\u3000\u3000\u5982\u679c\u4f60\u63a5\u89e6MySQL\u4e0d\u4e45\uff0c\u90a3\u4e48\u4f60\u4f1a\u504f\u5411\u4e8e\u4f7f\u7528\u4f60\u5df2\u7ecf\u638c\u63e1\u7684\u8bed\u8a00\u6765\u89e3\u51b3\u95ee\u9898\uff0c\u8fd9\u6837\u4f1a\u5bfc\u81f4\u5199\u51fa\u4e00\u4e9b\u5197\u4f59\u3001\u4f4e\u6548\u7387\u7684\u4ee3\u7801\u3002\u6bd4\u5982\uff0c\u4f60\u4e0d\u4f1a\u4f7f\u7528MySQL\u81ea\u5e26\u7684AVG()\u51fd\u6570\uff0c\u5374\u4f1a\u5148\u5bf9\u8bb0\u5f55\u96c6\u4e2d\u7684\u503c\u6c42\u548c\u7136\u540e\u7528PHP\u5faa\u73af\u6765\u8ba1\u7b97\u5e73\u5747\u503c\u3002<\/p>\n<p>\u3000\u3000\u6b64\u5916\uff0c\u8bf7\u6ce8\u610fPHP\u5faa\u73af\u4e2d\u7684SQL\u67e5\u8be2\u3002\u901a\u5e38\u6765\u8bf4\uff0c\u6267\u884c\u4e00\u4e2a\u67e5\u8be2\u6bd4\u5728\u7ed3\u679c\u4e2d\u8fed\u4ee3\u66f4\u6709\u6548\u7387\u3002<\/p>\n<p>\u3000\u3000\u6240\u4ee5\uff0c\u5728\u5206\u6790\u6570\u636e\u7684\u65f6\u5019\u8bf7\u5229\u7528\u6570\u636e\u5e93\u7cfb\u7edf\u7684\u4f18\u52bf\uff0c\u61c2\u4e00\u4e9bSQL\u7684\u77e5\u8bc6\u5c06\u5927\u6709\u88e8\u76ca\u3002<\/p>\n<p>\u3000\u3000<strong>6.\u6ca1\u6709\u4f18\u5316\u6570\u636e\u5e93\u67e5\u8be2<\/strong><\/p>\n<p>\u3000\u300099%\u7684PHP\u6027\u80fd\u95ee\u9898\u90fd\u662f\u7531\u6570\u636e\u5e93\u5f15\u8d77\u7684\uff0c\u4ec5\u4ec5\u4e00\u4e2a\u7cdf\u7cd5\u7684SQL\u67e5\u8be2\u5c31\u80fd\u8ba9\u4f60\u7684web\u5e94\u7528\u5f7b\u5e95\u762b\u75ea\u3002MySQL\u7684EXPLAIN statement\u3001Query Profiler\uff0c\u8fd8\u6709\u5f88\u591a\u5176\u4ed6\u7684\u5de5\u5177\u5c06\u4f1a\u5e2e\u52a9\u4f60\u627e\u51fa\u8fd9\u4e9b\u4e07\u6076\u7684SELECT\u3002<\/p>\n<p>\u3000\u3000<strong>7.\u4e0d\u80fd\u6b63\u786e\u4f7f\u7528\u6570\u636e\u7c7b\u578b<\/strong><\/p>\n<p>\u3000\u3000MySQL\u63d0\u4f9b\u4e86\u8bf8\u5982numeric\u3001string\u548cdate\u7b49\u7684\u6570\u636e\u7c7b\u578b\u3002\u5982\u679c\u4f60\u60f3\u5b58\u50a8\u4e00\u4e2a\u65f6\u95f4\uff0c\u90a3\u4e48\u4f7f\u7528DATE\u6216\u8005DATETIME\u7c7b\u578b\u3002\u5982\u679c\u8fd9\u4e2a\u65f6\u5019\u7528INTEGER\u6216\u8005STRING\u7c7b\u578b\u7684\u8bdd\uff0c\u90a3\u4e48\u5c06\u4f1a\u4f7f\u5f97SQL\u67e5\u8be2\u975e\u5e38\u590d\u6742\uff0c\u524d\u63d0\u662f\u4f60\u80fd\u4f7f\u7528INTEGER\u6216\u8005STRING\u6765\u5b9a\u4e49\u90a3\u4e2a\u7c7b\u578b\u3002<\/p>\n<p>\u3000\u3000\u5f88\u591a\u4eba\u503e\u5411\u4e8e\u64c5\u81ea\u81ea\u5b9a\u4e49\u4e00\u4e9b\u6570\u636e\u7684\u683c\u5f0f\uff0c\u6bd4\u5982\uff0c\u4f7f\u7528string\u6765\u5b58\u50a8\u5e8f\u5217\u5316\u7684PHP\u5bf9\u8c61\u3002\u8fd9\u6837\u7684\u8bdd\u6570\u636e\u5e93\u7ba1\u7406\u8d77\u6765\u53ef\u80fd\u4f1a\u53d8\u5f97\u7b80\u5355\u4e9b\uff0c\u4f46\u4f1a\u4f7f\u5f97MySQL\u6210\u4e3a\u4e00\u4e2a\u7cdf\u7cd5\u7684\u6570\u636e\u5b58\u50a8\u800c\u4e14\u4e4b\u540e\u5f88\u53ef\u80fd\u4f1a\u5f15\u8d77\u6545\u969c\u3002<\/p>\n<p>\u3000\u3000<strong>8.\u5728\u67e5\u8be2\u4e2d\u4f7f\u7528*<\/strong><\/p>\n<p>\u3000\u3000\u6c38\u8fdc\u4e0d\u8981\u4f7f\u7528*\u6765\u8fd4\u56de\u4e00\u4e2a\u6570\u636e\u8868\u6240\u6709\u5217\u7684\u6570\u636e\u3002\u8fd9\u662f\u61d2\u60f0\uff1a\u4f60\u5e94\u8be5\u63d0\u53d6\u4f60\u9700\u8981\u7684\u6570\u636e\u3002\u5c31\u7b97\u4f60\u9700\u8981\u6240\u6709\u5b57\u6bb5\uff0c\u4f60\u7684\u6570\u636e\u8868\u4e5f\u4e0d\u53ef\u907f\u514d\u7684\u4f1a\u4ea7\u751f\u53d8\u5316\u3002<\/p>\n<p>\u3000\u3000<strong>9.\u4e0d\u4f7f\u7528\u7d22\u5f15\u6216\u8005\u8fc7\u5ea6\u4f7f\u7528\u7d22\u5f15<\/strong><\/p>\n<p>\u3000\u3000\u4e00\u822c\u6027\u539f\u5219\u662f\u8fd9\u6837\u7684\uff1aselect\u8bed\u53e5\u4e2d\u7684\u4efb\u4f55\u4e00\u4e2awhere\u5b50\u53e5\u8868\u793a\u7684\u5b57\u6bb5\u90fd\u5e94\u8be5\u4f7f\u7528\u7d22\u5f15\u3002<\/p>\n<p>\u3000\u3000\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2auser\u8868\uff0c\u5305\u62ecnumeric ID(\u4e3b\u952e)\u548cemail address\u3002\u767b\u5f55\u7684\u65f6\u5019\uff0cMySQL\u5fc5\u987b\u4ee5\u4e00\u4e2aemail\u4e3a\u4f9d\u636e\u67e5\u627e\u6b63\u786e\u7684ID\u3002\u5982\u679c\u4f7f\u7528\u4e86\u7d22\u5f15\u7684\u8bdd(\u8fd9\u91cc\u6307email)\uff0c\u90a3\u4e48MySQL\u5c31\u80fd\u591f\u4f7f\u7528\u66f4\u5feb\u7684\u641c\u7d22\u7b97\u6cd5\u6765\u5b9a\u4f4demail\uff0c\u751a\u81f3\u53ef\u4ee5\u8bf4\u662f\u5373\u65f6\u5b9e\u73b0\u3002\u5426\u5219\uff0cMySQL\u5c31\u53ea\u80fd\u987a\u5e8f\u5730\u68c0\u67e5\u6bcf\u4e00\u6761\u8bb0\u5f55\u76f4\u5230\u627e\u5230\u6b63\u786e\u7684email address\u3002<\/p>\n<p>\u3000\u3000\u6709\u7684\u4eba\u4f1a\u5728\u6bcf\u4e2a\u5b57\u6bb5\u4e0a\u90fd\u6dfb\u52a0\u7d22\u5f15\uff0c\u9057\u61be\u7684\u662f\uff0c\u6267\u884c\u4e86INSERT\u6216\u8005UPDATE\u4e4b\u540e\u8fd9\u4e9b\u7d22\u5f15\u90fd\u9700\u8981\u91cd\u65b0\u751f\u6210\uff0c\u8fd9\u6837\u5c31\u4f1a\u5f71\u54cd\u6027\u80fd\u3002\u6240\u4ee5\uff0c\u53ea\u5728\u9700\u8981\u7684\u65f6\u5019\u6dfb\u52a0\u7d22\u5f15\u3002<\/p>\n<p>\u3000\u3000<strong>10.\u5fd8\u8bb0\u5907\u4efd!<\/strong><\/p>\n<p>\u3000\u3000\u867d\u7136\u6bd4\u8f83\u7f55\u89c1\uff0c\u4f46\u662f\u6570\u636e\u5e93\u8fd8\u662f\u6709\u5d29\u6e83\u7684\u5371\u9669\u3002\u786c\u76d8\u6709\u53ef\u80fd\u635f\u574f\uff0c\u670d\u52a1\u5668\u6709\u53ef\u80fd\u5d29\u6e83\uff0cweb\u4e3b\u673a\u63d0\u4f9b\u5546\u6709\u53ef\u80fd\u4f1a\u7834\u4ea7!\u4e22\u5931MySQL\u6570\u636e\u5c06\u4f1a\u662f\u707e\u96be\u6027\u7684\uff0c\u6240\u4ee5\u8bf7\u786e\u4fdd\u4f60\u5df2\u7ecf\u4f7f\u7528\u4e86\u81ea\u52a8\u5907\u4efd\u6216\u8005\u5df2\u7ecf\u590d\u5236\u5230\u4f4d\u3002<\/p>\n<p>\u3000\u3000<strong>11.Bonus mistake-\u4e0d\u8003\u8651\u4f7f\u7528\u5176\u4ed6\u6570\u636e\u5e93<\/strong><\/p>\n<p>\u3000\u3000\u5bf9\u4e8ePHP\u5f00\u53d1\u4eba\u5458\u6765\u8bf4\uff0cMySQL\u53ef\u80fd\u662f\u4f7f\u7528\u6700\u5e7f\u6cdb\u7684\u6570\u636e\u5e93\u7cfb\u7edf\uff0c\u4f46\u5e76\u4e0d\u662f\u552f\u4e00\u7684\u9009\u62e9\u3002PostgreSQL\u548cFirebird\u662f\u6700\u5f3a\u6709\u529b\u7684\u7ade\u4e89\u8005\uff1a\u8fd9\u4e2a\u4e24\u8005\u90fd\u662f\u5f00\u6e90\u7684\uff0c\u800c\u4e14\u90fd\u6ca1\u6709\u88ab\u516c\u53f8\u6536\u8d2d\u3002\u5fae\u8f6f\u63d0\u4f9b\u4e86sql server Express\uff0c\u7532\u9aa8\u6587\u63d0\u4f9b\u4e8610g 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