{"id":62,"date":"2023-01-15T20:14:23","date_gmt":"2023-01-15T12:14:23","guid":{"rendered":"http:\/\/blog.byzhb.top\/?p=62"},"modified":"2023-01-25T21:57:12","modified_gmt":"2023-01-25T13:57:12","slug":"phpxlh","status":"publish","type":"post","link":"https:\/\/blog.byzhb.top\/index.php\/2023\/01\/15\/phpxlh\/","title":{"rendered":"\u53cd\u5e8f\u5217\u5316\u5b57\u7b26\u4e32\u9003\u9038"},"content":{"rendered":"\r\n

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<?php\r\nfunction lemon($string)\r\n{\r\n$lemon = '\/p\/i';\r\nreturn preg_replace($lemon,'qq',$string);\/\/\u82e5\u5339\u914d\u5230p\u5219\u6362\u4e3aqq\r\n}\r\n$cmd=$_GET[\"cmd\"];\r\n$a=\"20\"; \/\/\u663e\u7136cmd\u7684\u503c\u6211\u4eec\u53ef\u4ee5\u81ea\u5b9a\u4e49\uff0c\u4f46a\u7684\u503c\u4e3a\u7cfb\u7edf\u56fa\u5b9a\u7684\r\nif(!empty($cmd))\r\n{\r\n$s=array($cmd,$a);\r\n$examp=lemon(serialize($s));\r\nvar_dump(unserialize($examp));\r\n}\r\n?><\/code><\/pre>\r\n\r\n\r\n\r\n
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\u6211\u4eec\u53ef\u4ee5\u6784\u9020 cmd \u4e3a:<\/p>\r\n\r\n\r\n\r\n
pppppppppppppppp\";i:1;s:2:\"18\";}<\/code><\/p>\r\n\r\n\r\n\r\n
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a:2:{i:0;s:32:\"<\/em>qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq\";i:1;s:2:\"18\";}\";i:1;s:2:\"20\";} \/\/\u53d8\u4e3a\u4e8632\u4e2aq\r\n\u53cd\u5e8f\u5217\u5316\u6267\u884c\u7684\u503c\uff1a\r\na:2:{i:0;s:32:\"qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq\";i:1;s:2:\"18\";}\/\/\u7531\u4e8e\u53cd\u5e8f\u5217\u5316\u65f6\u8bc6\u522b\u5230\u7b2c\u4e00\u4e2a\u5b57\u7b26\u957f\u5ea6\u4e3a32\uff0c\u6240\u4ee5\u4f1a\u81ea\u52a8\u5f80\u540e\u53d6\u5b8cq\uff0c\u6545\u7cfb\u7edf\u9ed8\u8ba4\u7684a\u4f1a\u88ab\u6392\u9664\u5728\u5916<\/code><\/pre>\r\n\r\n\r\n\r\n
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<?php\r\nfunction lemon($string)\r\n{\r\n    $lemon = '\/p\/i';\r\n    return preg_replace($lemon,'',$string);\/\/\u82e5\u5339\u914d\u5230p\u5219\u6362\u4e3a\u7a7a\r\n}\r\n$cat=$_GET[\"cat\"];\r\n$cmd=$_GET[\"cmd\"];\r\n$a=\"20\";        \/\/\u663e\u7136a\u7684\u503c\u6211\u4eec\u53ef\u4ee5\u81ea\u5b9a\u4e49\uff0c\u4f46cmd\u7684\u503c\u4e3a\u7cfb\u7edf\u56fa\u5b9a\u7684\r\nif(!empty($cmd)&&!empty($cat))\r\n{\r\n$s=array($cat,$cmd,$a);         \r\n$examp=lemon(serialize($s));\r\nvar_dump(unserialize($examp));\r\n}\r\n?><\/code><\/pre>\r\n\r\n\r\n\r\n
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\u4ee4cat\u4e3a\uff1a<\/p>\r\n\r\n\r\n\r\n
ppppppppppp<\/code><\/p>\r\n\r\n\r\n\r\n
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\u4ee4cmd\u4e3a\uff1a<\/p>\r\n\r\n\r\n\r\n
;i:1;s:3:\"dog\";i:2;s:2:\"18\";}<\/code><\/p>\r\n\r\n\r\n\r\n
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a:3:{1:0;s:11:\"\";i:1;s:29:\"||\u541e\u5230\u8fd9<\/em>;i:1;s:3:\"dog\";i:2;s:2:\"18\";}\";i:2;s:2:\"20\";}p\u53d8\u4e3a\u7a7a\u540e\uff0c\u4ec5\u5269:;\u4e24\u4e2a\u5b57\u7b26\uff0c\u5411\u540e\u541e9\u4e2a\uff0c\u6b63\u597d\u5230\u8981\u4fee\u6539\u7684\u503c\uff0c\u7531\u4e8e\u7b2c\u4e8c\u4e2a\u53d8\u91cf\u6d88\u5931\u4e86\uff0c\u4f46\u9700\u89813\u4e2a\u53d8\u91cf\uff0c\u6240\u4ee5\u6211\u9700\u8981\u81ea\u62df\u4e00\u4e2adog\u53d8\u91cf\uff0c\u51d1\u591f3\u4e2a
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