通过Regex将字符串解析为具有新行链的数组，而不使用PHP中的任何删除

I need to parse this string:

$str = "


ABC

DEF
GHI


JKL" ;

into this array:

$arr = [
    "


",
    "ABC
",
    "
",
    "DEF
",
    "GHI
",
    "

",
    "JKL"
] ;

I tried many combinations, but no luck:

$arr = preg_match_all("/[^
]+[
]+/",$str,$out) ;

What Regex can handle that?

This pattern does the job:

preg_match_all('~
+|.+
?~', $str, $matches);

demo

As an aside, preg_match_all returns the number of matches or false, the matches are stored in the third parameter.