$array
=
[
0 => 's',
1 => 't',
2 => 'r',
3 => 'i',
4 => 'n',
5 => 'g',
]
#1
|
preg_split
|
('/[\s ]+/', |
#2
|
preg_split
|
("//", |
#3
|
preg_split
|
("/ /", |