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]   
        
        
       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]   
         
        
       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