正则表达式与字母数字，空格和破折号

Question

我需要构建一个只允许a-z，A-Z，0-9，破折号，空格和单引号的正则表达式。字符串中不允许双空格，短划线只能在字符串内，字符串内不允许使用双引号。该字符串只能以字母开头（如果可能，最好是大写字母）或数字（0-9）。 有什么建议吗？

允许：

   "My Test" 
   "My-test"
   "1My-t-es-t"
   "1250 My t-es-t"

不允许：

   "My  Test" 
   "-My Test-"
   "My T''est" 

Answer 1

这可能有效 https://regex101.com/r/h8ggbH/1

"[A-Z0-9](?:[a-zA-Z0-9]|[ ](?![ ])|'(?!')|-(?!"))*"

解释

 "                     # Dbl Quote
 [A-Z0-9]              # UC Letter or digit
 (?:                   # Cluster
      [a-zA-Z0-9]           # Alphanum
   |                      # or,
      [ ]                   # Space
      (?! [ ] )             #    if not followed by space
   |                      # or,
      '                     # Quote
      (?! ' )               #    if not followed by quote
   |                      # or,
      -                     # Dash
      (?! " )               #    if not followed by dbl quote
 )*                    # Do 0 to many times
 "                     # Dbl Quote