digits - Regex to match 3 numbers -


Currently, I'm trying to create a regex, which can get 3 numbers under some circumstances. I have tried many attempts now, but it will not work with a single expression - it either matches "bad positive" or "wrong numbers" ...

words : I have to get any 3 points which

  • is visible at the beginning of a string
  • Empiring somewhere inside the string
  • (End string not possible)

    If:

    • Another 3-digit group matching this condition is not.
    • Group "p" or "i"
    • The group is not followed "x"

      in examples Strong> (the number that I want to match) in () :

      • This (321) is an example.
      • Also included (321) // Basically not possible, but can not hurt.
      • This is another group with AP (321): 122p
      • This is another group of (321) I: 123i
      • Reasons for this x235 (123) that I want to do.
      • (123) What do I want, no x111 or 125p or 999i
      • There is no solution in this 111 case 555

        (I This is needed (1 number) (2 numbers) - but this will only be a bit change in the match of 3 numbers)

        My last attempt looks like this: 

          ( ?: [^ X] | ^) (\ D {1}) (\ d {2}) [^ pi]   
          regular expression view  
          
         However this fails in the final case. I used it for  preg_match_all (... ) === 1  with this Tried to make sure, only one result was matched  
         However, now a teststring like "101 202" is positive because first check matches  101  (with white spot ) And then does not match the  202 , which assumes the pattern that  101  is the only legitimate solution - which is false.  
          ( ?: [^ x] | ^) (\ d {1}) (\ d {2}) [^ pi]   
          regular expression view   
          
         Any thoughts?  
         Note: It should work on various regex engines, no matter what php, javascript, java, .net or ook! :)   
         
         
         We can write the numbers you are looking for like this:  
          re_n = (?: [^ X] | ^) \ d \ d \ d (?: [^ Ip] | $)   
         Then the whole expression is:  
          ^ (?!. Re_n. * Re_n. * $) * (Re_n)   
         After the line ends the two numbers using a negative lookhead, start the anchor, then matches a valid number.  
         Interpolated expression looks useless:  
          / ^ (?!. * (?: (? ^ [^ X] | ^) \ d \ d \ d ( [^ Ip] | $)) * (: ([^ x] | ^) \ d \ d \ d (:. ?? [^ ip] | $). * $). * ([? ^ [^ X] | ^) \ d \ d \ d (?: [^ Ip] | $))) /   
         This perl code:  
          my $ re_n = qr / (?: [^ X] | ^) \ d \ d \ d (?: [^ Ip] | $) /; While (& lt; data & gt;) {chomp; If (/ ((??) .. ***************** "$ _: $ 1 \ n";} Other {print "$ _: none" \ "";}} __DATA__ This is a 321 example. 321 in 321 is not basically possible, but can not hurt. There is another group with P: 122p this 321 is another group I: 123i This x235 should be ignored because the reason 123 is what I want to match is 123 which is what I want, not 111 in this case x111 Or there is no solution in 125p or 999i 555   
          produces:   
          this 321 An example is: 321 321 also: 321/321 is not basically possible, but can not hurt: 321 This 321 has another group with AP: 122 P: 321 In 321 this is the second group with I: 123i: 321 This X-235 should be sponsored because the 123 which I want to match: 123 123 I do not want, x111 or 125p or 999i: 123 There is no solution in this 111 case 555: No

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