[PHP8.0.3] Fine-Diffによる差分解析

PHP Fine-Diffを使います。
GitHub:PHP-FineDiff

$ git clone https://github.com/gorhill/PHP-FineDiff.git

include 'finediff.php';

$filename1 = 'sample_from.txt';
$from_text = file_get_contents($filename1);

$filename2 = 'sample_to.txt';
$to_text = file_get_contents($filename2);

$opcodes = FineDiff::getDiffOpcodes($from_text, $to_text);

var_dump($opcodes);

$ php index.php
string(534) “c64di:9cd2i2:58c3di:9cdi4:Febrcd4i3:aryc4di:1c17di:uc185i:,c6dc84di:uc120d2i: c122di:uc238di:uc113di:uc528di:bc325di:uc106di:uc36di:uc185di:uc371di:uc267di:uc92di:uc124dc8dc5di:
c335di:uc78di:uc11di3:immcdi4:nselc39di:.ci31:The region visible from Earth (c15d4i4:univc2i3:se)c4d12c4d2i3:herc2i5:with ci15: radius of abouc2d5i2:46cd3c19d8i:,c5i83:based on where the expansion of space has taken the most distant objects observed. c763i:1cdc10d31c36di2:30c14d4i2:3?c3di:3ci:.c4dc474di:uc172di:uc191di:uc166di:uc435di:uc66d34c29di:uc1039”

🤔、ちょっとよくわからんな。