[常见的匹配原则](%E5%B8%B8%E8%A7%81%E7%9A%84%E5%8C%B9%E9%85%8D%E5%8E%9F%E5%88%99.md) [验证密码长度](%E9%AA%8C%E8%AF%81%E5%AF%86%E7%A0%81%E9%95%BF%E5%BA%A6.md) [表单验证](%E8%A1%A8%E5%8D%95%E9%AA%8C%E8%AF%81.md) [正则提取](%E6%AD%A3%E5%88%99%E6%8F%90%E5%8F%96.md) [正则替换](%E6%AD%A3%E5%88%99%E6%9B%BF%E6%8D%A2.md)