用于匹配SQL空间数据的正则表达式

Question

如何创建匹配MySQL空间多线字符串坐标的正则表达式。 匹配：

(33 44, 98 33)
(10 10, 20 20), (15 15, 30 15)
(10 10, 20 20), (15 15, 30 15), (10 10, 11 11, 22 22)

Answer 1

匹配每个坐标：

(\((?:\d+\s\d+,\s)*\d+\s\d+\))

/(
  \(         # opening parenthesis  "("
    (?:      # non-capturing group  "("
      \d+    # one or more number   "(33"
      \s     # a space              "(33 "
      \d+    # one or more number   "(33 44"
      ,\s    # a comma and a space  "(33 44, "
    )*       # repeat n time        "(33 44, "
    \d+\s\d+ # plus a last one      "(33 44, 98 33"
  \)         # closing parenthesis  "(33 44, 98 33)"
)/x

匹配每个坐标组（=每一行）：

((?:\((?:\d+\s\d+,\s)*\d+\s\d+\),\s)*\((?:\d+\s\d+,\s)*\d+\s\d+\))

/(
  (?:                            # non-capturing group ""
    \((?:\d+\s\d+,\s)*\d+\s\d+\) # cf first regex      "(10 10, 20 20)"
    ,\s                          # comma and space     "(10 10, 20 20), "
  )*                             # repeat n time       "(10 10, 20 20), (15 15, 30 15), "
  \((?:\d+\s\d+,\s)*\d+\s\d+\)   # plus a last one     "(10 10, 20 20), (15 15, 30 15), (10 10, 11 11, 22 22)"
)/x