regex - PHP Remove some trailing digits of numbers in string by group -

i havea series of strings in following format...

aebvaejbh286720467-snehndfn3984777-sobn3895  jklasebntb-nlb93876-adbnbnbn-34978  357896-alalalalalal3986-bh3806-023847 

and on.

i need letters , dashes, first 2 numbers in group, example:

aebvaejbh286720467-snehndfn3984777-sobn3895 

would become

aebvaejbh28-snehndfn39-sobn38 

and

jklasebntb-nlb93876-adbnbnbn-34978 

would become

jklasebntb-nlb93-adbnbnbn-34 

and

357896-alalalalalal3986-bh3806-023847 

would become

35-alalalalalal39-bh38-02 

and on.

i think sed/awk in bash, need in php. ideas great.

i build new string , add each character 1 @ time while keeping count how many numbers i've added. if character not number, add - if is, add if it's 1st or 2nd number.

  $string = '357896-alalalalalal3986-bh3806-023847';   $result = '';   $digit_count = 0;    foreach(str_split($string) $character) {      if(!is_numeric($character) || ++$digit_count <= 2)       $result .= $character;      if($character == '-')       $digit_count = 0;   }    print $result;