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链接数：0/6

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非法链接：0

序号 标题 链接 结果
1 Codiga Hub https://app.codiga.io/hub/rulesets
2 Try on Playground https://app.codiga.io/hub/playground?name=sql-injection&rule=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%2BIGUubmFtZS52YWx1ZSkuaW5jbHVkZXMoInRleHQiKSkubGVuZ3RoID4gMDsKCiAgICBpZiAoaGFzRXJyb3IgJiYgaW1wb3J0VGV4dEZyb21TcWxBbGNoZW15ICYmIG5vZGUuZnVuY3Rpb25OYW1lLnZhbHVlID09PSAidGV4dCIpIHsKICAgICAgICBjb25zdCBlcnJvciA9IGJ1aWxkRXJyb3Iobm9kZS5zdGFydC5saW5lLCBub2RlLnN0YXJ0LmNvbCwgbm9kZS5lbmQubGluZSwgbm9kZS5lbmQuY29sLCBlcnJvck1lc3NhZ2UsICJDUklUSUNBTCIsICJTQUZFVFkiKTsKICAgICAgICBhZGRFcnJvcihlcnJvcik7CiAgICB9CiAgfQp9&ruleType=ast&test=ZnJvbSBzcWxhbGNoZW15IGltcG9ydCB0ZXh0CiAgCiMgd3JpdGUgdGhlIFNRTCBxdWVyeSBpbnNpZGUgdGhlIHRleHQoKSBibG9jawpzcWwgPSB0ZXh0KGYiU0VMRUNUICogZnJvbSBCT09LUyBXSEVSRSBCT09LUy5ib29rX3ByaWNlID4ge215X3ByaWNlfSIpCnJlc3VsdHMgPSBlbmdpbmUuZXhlY3V0ZShzcWwp&filename=sql-alchemy-errors.py&language=Python&pattern=&entityChecked=functioncall
3 Get Custom Analysis Rules https://app.codiga.io/hub/rulesets/explore/
4 Explore Code Snippets Hub https://app.codiga.io/hub/cookbooks/
5 Learn more https://app.codiga.io/
6 Code Snippets on Codiga Hub https://app.codiga.io/hub/
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工具简介

死链接 - 也称无效链接，即那些不可达到的链接。

一个网站存在死链接不是什么好事，首先一个网站如果存在大量的死链接，必将大大损伤网站的整体形象，再者搜索引擎蜘蛛是通过链接来爬行搜索，如果太多链接无法到达，不但收录页面数量会减少，而且你的网站在搜索引擎中的权重会大大降低。该查询可以遍历指定网页的所有链接，并分析每个链接的有效性，找出死链接。

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