php - How to detect changed part of multiple texts -

i got multiple string in array should find part (=words) changed (what changed text , located). algorithm should use?

input

$strings = [     'a' => 'blah blah. value of 123456 , 50%.',     'b' => 'blah blah. value of 10203 , 75%.',     'c' => 'blah blah. value of 9999 , 500%.',     // more rows ]; 

output

$output = 'blah blah. value of [a=123456|b=10203|c=9999] , [a=50%|b=75%|c=500%].'; 

(yes, i'm going add fancy html mouseover @ point ..)

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currently i'm doing experiments php-finediff, it's huge mess if want compare more 2 strings each-other. (should write huge loop check characters 1 @ time or try regular expressions or .. ?)

this should bit closer finding answer; can split each sentence arrays of words, run array_diff() on them collectively. combine words , create arrays found match earlier:

$strings = [     'a' => 'blah blah. value of 123456 , 50%.',     'b' => 'blah blah. value of 10203 , 75%.',     'c' => 'blah blah. value of 9999 , 500%.', ];  // turn sentences arrays of "words" (adjust necessary) $tmp = array_map(function($arr) {     return explode(' ', $arr); }, $strings);  // find collective differences $diff = call_user_func_array('array_diff', $tmp);  // build final result $result = []; foreach ($tmp $id => $words) {     foreach ($words $index => $word) {         if (isset($diff[$index])) {             $result[$index][$id] = $word;         } else {             $result[$index] = $word;         }     } }  print_r($result); 

output

array (     [0] => blah     [1] => blah.     [2] => value     [3] => of     [4] =>     [5] =>     [6] => array         (             [a] => 123456             [b] => 10203             [c] => 9999         )      [7] => ,     [8] =>     [9] =>     [10] =>     [11] => array         (             [a] => 50%.             [b] => 75%.             [c] => 500%.         )  )