<?php
 
$string = <<<DATA
health status index              pri rep docs.count docs.deleted store.size pri.store.size 
yellow  open   first_index          5   1     222173            0     43.8gb         43.8gb 
green   open   second_index         5   1      27131            7     36.6gb         36.6gb 
red     open   third_index          5   1       4047            0     22.4mb         22.4mb 
DATA;
 
$regex = '~^(\w+)\W+\w+\W+(\w+)~m';
 
preg_match_all($regex, $string, $matches, PREG_SET_ORDER);
 
foreach ($matches as $match) {
   echo $match[2] . "-" . $match[1] . "\n";
}
?>

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