{"id":372916,"date":"2022-06-11T01:28:12","date_gmt":"2022-06-10T17:28:12","guid":{"rendered":"https:\/\/www.idc.net\/help\/372916\/"},"modified":"2022-06-11T01:28:12","modified_gmt":"2022-06-10T17:28:12","slug":"php%e4%b8%ad%e8%af%a5%e6%80%8e%e6%a0%b7%e9%98%b2%e6%ad%a2sql%e6%b3%a8%e5%85%a5%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/372916\/","title":{"rendered":"PHP\u4e2d\u8be5\u600e\u6837\u9632\u6b62SQL\u6ce8\u5165\uff1f"},"content":{"rendered":"

\u95ee\u9898\u63cf\u8ff0\uff1a<\/h2>\n

\u5982\u679c\u7528\u6237\u8f93\u5165\u7684\u6570\u636e\u5728\u672a\u7ecf\u5904\u7406\u7684\u60c5\u51b5\u4e0b\u63d2\u5165\u5230\u4e00\u6761SQL\u67e5\u8be2\u8bed\u53e5\uff0c\u90a3\u4e48\u5e94\u7528\u5c06\u5f88\u53ef\u80fd\u906d\u53d7\u5230SQL\u6ce8\u5165\u653b\u51fb\uff0c\u6b63\u5982\u4e0b\u9762\u7684\u4f8b\u5b50\uff1a<\/p>\n

\n \n 
    \n  \n  
  1. $unsafe_variable = $_POST[<\/span>'user_input'<\/span>];   <\/span><\/span><\/li>\n  \n  
  2.    <\/span><\/li>\n  \n  
  3. mysql_query(<\/span>\"INSERT INTO `table` (`column`) VALUES ('\"<\/span> . $unsafe_variable . <\/span>\"')\"<\/span>);   <\/span><\/li>\n \n <\/ol><\/pre>\n
    \u56e0\u4e3a\u7528\u6237\u7684\u8f93\u5165\u53ef\u80fd\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n
    \n \n 
      \n  \n  
    1. value'); <\/span>DROP<\/span> <\/span>TABLE<\/span> <\/span>table<\/span>;<\/span>--<\/span> <\/span><\/span><\/li>\n \n <\/ol><\/pre>\n
      \u90a3\u4e48SQL\u67e5\u8be2\u5c06\u53d8\u6210\u5982\u4e0b\uff1a<\/p>\n
      \n \n 
        \n  \n  
      1. INSERT<\/span> <\/span>INTO<\/span> `<\/span>table<\/span>` (`<\/span>column<\/span>`) <\/span>VALUES<\/span>(<\/span>'value'<\/span>); <\/span>DROP<\/span> <\/span>TABLE<\/span> <\/span>table<\/span>;<\/span>--')<\/span> <\/span><\/span><\/li>\n \n <\/ol><\/pre>\n
        \u5e94\u8be5\u91c7\u53d6\u54ea\u4e9b\u6709\u6548\u7684\u65b9\u6cd5\u6765\u9632\u6b62SQL\u6ce8\u5165\uff1f<\/p>\n
        \u6700\u4f73\u56de\u7b54\uff08\u6765\u81eaTheo<\/font><\/a>\uff09\uff1a<\/h2>\n
        \u4f7f\u7528\u9884\u5904\u7406\u8bed\u53e5\u548c\u53c2\u6570\u5316\u67e5\u8be2\u3002\u9884\u5904\u7406\u8bed\u53e5\u548c\u53c2\u6570\u5206\u522b\u53d1\u9001\u5230\u6570\u636e\u5e93\u670d\u52a1\u5668\u8fdb\u884c\u89e3\u6790\uff0c\u53c2\u6570\u5c06\u4f1a\u88ab\u5f53\u4f5c\u666e\u901a\u5b57\u7b26\u5904\u7406\u3002\u8fd9\u79cd\u65b9\u5f0f\u4f7f\u5f97\u653b\u51fb\u8005\u65e0\u6cd5\u6ce8\u5165\u6076\u610f\u7684SQL\u3002 \u4f60\u6709\u4e24\u79cd\u9009\u62e9\u6765\u5b9e\u73b0\u8be5\u65b9\u6cd5\uff1a<\/p>\n
        1\u3001\u4f7f\u7528PDO\uff1a<\/strong><\/p>\n
        \n \n 
          \n  \n  
        1. $stmt = $pdo-><\/span>prepare<\/span>(<\/span>'SELECT * FROM employees WHERE name = :name'<\/span>);  <\/span><\/span><\/li>\n  \n  
        2.    <\/span><\/li>\n  \n  
        3. $stmt-><\/span>execute<\/span>(array(<\/span>'name'<\/span> => $<\/span>name<\/span>));  <\/span><\/li>\n  \n  
        4.    <\/span><\/li>\n  \n  
        5. foreach ($stmt <\/span>as<\/span> $row) {  <\/span><\/li>\n  \n  
        6.     \/\/ do something <\/span>with<\/span> $row  <\/span><\/li>\n  \n  
        7. } <\/span><\/li>\n \n <\/ol><\/pre>\n
          2\u3001\u4f7f\u7528mysqli\uff1a<\/strong><\/p>\n
          \n  \n 
            \n   \n  
          1. $stmt = $dbConnection-><\/span>prepare<\/span>(<\/span>'SELECT * FROM employees WHERE name = ?'<\/span>);  <\/span><\/span><\/li>\n   \n  
          2. $stmt->bind_param(<\/span>'s'<\/span>, $<\/span>name<\/span>);  <\/span><\/li>\n   \n  
          3.    <\/span><\/li>\n   \n  
          4. $stmt-><\/span>execute<\/span>();  <\/span><\/li>\n   \n  
          5.    <\/span><\/li>\n   \n  
          6. $result = $stmt->get_result();  <\/span><\/li>\n   \n  
          7. while ($row = $result->fetch_assoc()) {  <\/span><\/li>\n   \n  
          8.     \/\/ do something <\/span>with<\/span> $row  <\/span><\/li>\n   \n  
          9. } <\/span><\/li>\n  \n <\/ol><\/pre>\n
            PDO<\/strong>   <\/p>\n
            \u6ce8\u610f\uff0c\u5728\u9ed8\u8ba4\u60c5\u51b5\u4f7f\u7528PDO\u5e76\u6ca1\u6709\u8ba9MySQL\u6570\u636e\u5e93\u6267\u884c\u771f\u6b63\u7684\u9884\u5904\u7406\u8bed\u53e5\uff08\u539f\u56e0\u89c1\u4e0b\u6587\uff09\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u4f60\u5e94\u8be5\u7981\u6b62PDO\u6a21\u62df\u9884\u5904\u7406\u8bed\u53e5\u3002\u4e00\u4e2a\u6b63\u786e\u4f7f\u7528PDO\u521b\u5efa\u6570\u636e\u5e93\u8fde\u63a5\u7684\u4f8b\u5b50\u5982\u4e0b\uff1a<\/p>\n
            \n \n 
              \n  \n  
            1. $dbConnection = new PDO(<\/span>'mysql:dbname=dbtest;host=127.0.0.1;charset=utf8'<\/span>, <\/span>'user'<\/span>, <\/span>'pass'<\/span>);  <\/span><\/span><\/li>\n  \n  
            2.    <\/span><\/li>\n  \n  
            3. $dbConnection->setAttribute(PDO::ATTR_EMULATE_PREPARES, <\/span>false<\/span>);  <\/span><\/li>\n  \n  
            4. $dbConnection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); <\/span><\/li>\n \n <\/ol><\/pre>\n
              \u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u62a5\u9519\u6a21\u5f0f(ATTR_ERRMODE)\u5e76\u4e0d\u662f\u5fc5\u987b\u7684\uff0c\u4f46\u5efa\u8bae\u52a0\u4e0a\u5b83\u3002\u8fd9\u6837\uff0c\u5f53\u53d1\u751f\u81f4\u547d\u9519\u8bef(Fatal Error)\u65f6\uff0c\u811a\u672c\u5c31\u4e0d\u4f1a\u505c\u6b62\u8fd0\u884c\uff0c\u800c\u662f\u7ed9\u4e86\u7a0b\u5e8f\u5458\u4e00\u4e2a\u6355\u83b7PDOExceptions\u7684\u673a\u4f1a\uff0c\u4ee5\u4fbf\u5bf9\u9519\u8bef\u8fdb\u884c\u59a5\u5584\u5904\u7406\u3002 \u7136\u800c\uff0c\u7b2c\u4e00\u4e2asetAttribute()\u8c03\u7528\u662f\u5fc5\u987b\u7684\uff0c\u5b83\u7981\u6b62PDO\u6a21\u62df\u9884\u5904\u7406\u8bed\u53e5\uff0c\u800c\u4f7f\u7528\u771f\u6b63\u7684\u9884\u5904\u7406\u8bed\u53e5\uff0c\u5373\u6709MySQL\u6267\u884c\u9884\u5904\u7406\u8bed\u53e5\u3002\u8fd9\u80fd\u786e\u4fdd\u8bed\u53e5\u548c\u53c2\u6570\u5728\u53d1\u9001\u7ed9MySQL\u4e4b\u524d\u6ca1\u6709\u88abPHP\u5904\u7406\u8fc7\uff0c\u8fd9\u5c06\u4f7f\u5f97\u653b\u51fb\u8005\u65e0\u6cd5\u6ce8\u5165\u6076\u610fSQL\u3002\u4e86\u89e3\u539f\u56e0\uff0c\u53ef\u53c2\u8003\u8fd9\u7bc7\u535a\u6587\uff1aPDO\u9632\u6ce8\u5165\u539f\u7406\u5206\u6790\u4ee5\u53ca\u4f7f\u7528PDO\u7684\u6ce8\u610f\u4e8b\u9879<\/font><\/a>\u3002 \u6ce8\u610f\u5728\u8001\u7248\u672c\u7684PHP(<5.3.6)\uff0c\u4f60\u65e0\u6cd5\u901a\u8fc7\u5728PDO\u7684\u6784\u9020\u5668\u7684DSN\u4e0a\u8bbe\u7f6e\u5b57\u7b26\u96c6\uff0c\u53c2\u8003\uff1asilently ignored the charset parameter<\/font><\/a>\u3002<\/p>\n
              \u89e3\u6790<\/h2>\n
              \u5f53\u4f60\u5c06SQL\u8bed\u53e5\u53d1\u9001\u7ed9\u6570\u636e\u5e93\u670d\u52a1\u5668\u8fdb\u884c\u9884\u5904\u7406\u548c\u89e3\u6790\u65f6\u53d1\u751f\u4e86\u4ec0\u4e48\uff1f\u901a\u8fc7\u6307\u5b9a\u5360\u4f4d\u7b26\uff08\u4e00\u4e2a?\u6216\u8005\u4e00\u4e2a\u4e0a\u9762\u4f8b\u5b50\u4e2d\u547d\u540d\u7684 :name\uff09\uff0c\u544a\u8bc9\u6570\u636e\u5e93\u5f15\u64ce\u4f60\u60f3\u5728\u54ea\u91cc\u8fdb\u884c\u8fc7\u6ee4\u3002\u5f53\u4f60\u8c03\u7528execute\u7684\u65f6\u5019\uff0c\u9884\u5904\u7406\u8bed\u53e5\u5c06\u4f1a\u4e0e\u4f60\u6307\u5b9a\u7684\u53c2\u6570\u503c\u7ed3\u5408\u3002 \u5173\u952e\u70b9\u5c31\u5728\u8fd9\u91cc\uff1a\u53c2\u6570\u7684\u503c\u662f\u548c\u7ecf\u8fc7\u89e3\u6790\u7684SQL\u8bed\u53e5\u7ed3\u5408\u5230\u4e00\u8d77\uff0c\u800c\u4e0d\u662fSQL\u5b57\u7b26\u4e32\u3002SQL\u6ce8\u5165\u662f\u901a\u8fc7\u89e6\u53d1\u811a\u672c\u5728\u6784\u9020SQL\u8bed\u53e5\u65f6\u5305\u542b\u6076\u610f\u7684\u5b57\u7b26\u4e32\u3002\u6240\u4ee5\uff0c\u901a\u8fc7\u5c06SQL\u8bed\u53e5\u548c\u53c2\u6570\u5206\u5f00\uff0c\u4f60\u9632\u6b62\u4e86SQL\u6ce8\u5165\u7684\u98ce\u9669\u3002\u4efb\u4f55\u4f60\u53d1\u9001\u7684\u53c2\u6570\u7684\u503c\u90fd\u5c06\u88ab\u5f53\u4f5c\u666e\u901a\u5b57\u7b26\u4e32\uff0c\u800c\u4e0d\u4f1a\u88ab\u6570\u636e\u5e93\u670d\u52a1\u5668\u89e3\u6790\u3002\u56de\u5230\u4e0a\u9762\u7684\u4f8b\u5b50\uff0c\u5982\u679c$name\u53d8\u91cf\u7684\u503c\u4e3a \u2019Sarah\u2019; DELETE FROM employees \uff0c\u90a3\u4e48\u5b9e\u9645\u7684\u67e5\u8be2\u5c06\u662f\u5728 employees \u4e2d\u67e5\u627e name \u5b57\u6bb5\u503c\u4e3a \u2019Sarah\u2019; DELETE FROM employees \u7684\u8bb0\u5f55\u3002 \u53e6\u4e00\u4e2a\u4f7f\u7528\u9884\u5904\u7406\u8bed\u53e5\u7684\u597d\u5904\u662f\uff1a\u5982\u679c\u4f60\u5728\u540c\u4e00\u6b21\u6570\u636e\u5e93\u8fde\u63a5\u4f1a\u8bdd\u4e2d\u6267\u884c\u540c\u6837\u7684\u8bed\u53e5\u8bb8\u591a\u6b21\uff0c\u5b83\u5c06\u53ea\u88ab\u89e3\u6790\u4e00\u6b21\uff0c\u8fd9\u53ef\u4ee5\u63d0\u5347\u4e00\u70b9\u6267\u884c\u901f\u5ea6\u3002 \u5982\u679c\u4f60\u60f3\u95ee\u63d2\u5165\u8be5\u5982\u4f55\u505a\uff0c\u8bf7\u770b\u4e0b\u9762\u8fd9\u4e2a\u4f8b\u5b50\uff08\u4f7f\u7528PDO\uff09\uff1a<\/p>\n
              \n \n 
                \n  \n  
              1. $preparedStatement = $db-><\/span>prepare<\/span>(<\/span>'INSERT INTO table (column) VALUES (:column)'<\/span>);  <\/span><\/span><\/li>\n  \n  
              2.    <\/span><\/li>\n  \n  
              3. $preparedStatement-><\/span>execute<\/span>(array(<\/span>'column'<\/span> => $unsafeValue)); <\/span><\/li>\n \n <\/ol><\/pre>\n
                \u539f\u6587\u94fe\u63a5\uff1a StackOverflow<\/font><\/a>   \u7ffb\u8bd1\uff1a \u4f2f\u4e50\u5728\u7ebf <\/font><\/a>- rokety<\/font><\/a><\/p>\n
                \u8bd1\u6587\u94fe\u63a5\uff1a http:\/\/blog.jobbole.com\/67875\/<\/font><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
                \u95ee\u9898\u63cf\u8ff0\uff1a \u5982\u679c\u7528\u6237\u8f93\u5165\u7684\u6570\u636e\u5728\u672a\u7ecf\u5904\u7406\u7684\u60c5\u51b5\u4e0b\u63d2\u5165\u5230\u4e00\u6761SQL\u67e5\u8be2\u8bed\u53e5\uff0c\u90a3\u4e48\u5e94\u7528\u5c06\u5f88\u53ef\u80fd\u906d\u53d7\u5230SQL\u6ce8\u5165\u653b\u51fb […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61],"tags":[],"class_list":["post-372916","post","type-post","status-publish","format-standard","hentry","category-website"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/372916","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=372916"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/372916\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=372916"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=372916"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=372916"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}