正则识别特定模式

Question

我正在编写正则是我的字符串中的特定模式。我必须确定字符串是否满足我想要的所有模式。我有以下标准：

1. 该名称应以“ p”或“ q”或“ r”开始
2. ，之后的第一个字符应匹配字符串，
3. 如果存在xyz，则应 匹配“ xyz”或“ abcd” “ H”或“ D”，如果存在“ ABCD”，则第9个字符应为“ H”或“ D”。

字符串可能是：

PXYZ****H***** -> Should be true
QABCD****H***** -> Should be true
AXYG****Z***** -> Should be false
RABCD****H=D***** -> Should be true

如果字符串以开头（[P | Q | r]）\ W+，我已经尝试过，不确定如何结合其他。

Answer 1

使用

^[PQR](XYZ|ABCD)....[HD].*

请参阅正则表达式证明。

说明

^ asserts position at start of a line
 Match a single character present in the list below [PQR]
   PQR matches a single character in the list PQR (case sensitive)
 1st Capturing Group (XYZ.|ABCD.)
   1st Alternative XYZ.
     XYZ matches the characters XYZ literally (case sensitive)
 2nd Alternative ABCD.
   ABCD matches the characters ABCD literally (case sensitive)

 . matches any character (except for line terminators)
 . matches any character (except for line terminators)
 . matches any character (except for line terminators)
 . matches any character (except for line terminators)
 Match a single character present in the list below [HD]
   HD matches a single character in the list HD (case sensitive)
 . matches any character (except for line terminators)
 * matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)

Answer 2

此正则具体的是：

• 以pqr
• 开始使用xyz或abcd
• 具有h或<代码> d 结束前的五个字符

是我的尝试：

'^[PQR](XYZ|ABCD).*[HD].{5}
它对您有用吗？

它对您有用吗？