function splitIntoLines(string $content): array { return preg_split('/\R/', $content); }This function will return blank lines (if any), use this option if you don't want empty lines:
preg_split('/\R/', $content, PREG_SPLIT_NO_EMPTY);
Programming Tips - PHP: big string that is the contents of a file into lines
Date: 2021mar24
Language: php
Q. PHP: big string that is the contents of a file into lines
A. Use \R in preg_split()