How to prevent it from accepting one letter with one space each side of it (one letter word)?

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^(?:\d{1,3}\h+)?\D\S*(?:\h+\S+){0,3}$

https://regex101.com/r/t2HCLm/1 It is working fine for me. now I want to modify it

How to prevent it from accepting one letter with one space each side of it (one letter word)? I meant that each word's letter limit should more than 1 letter. example: This is a School=false This is the School=true

This is a School=false 
This is the School=true
regex
1 Answers

You can use

^(?:\d{1,3}\h+)?[^\d\s]\S+(?:\h+\S{2,}){0,3}$

See the regex demo

Details:

  • ^ - string start
  • (?:\d{1,3}\h+)? - an optional sequence of one, two or three digits followed with one or more horizontal whitespaces
  • [^\d\s] - a char other than a digit and whitespace
  • \S+ - one or more non-whitespaces
  • (?:\h+\S{2,}){0,3} - zero to three sequences of one or more horizontal whitespaces and then two or more non-whitespace chars
  • $ - string end.
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