> dump hello
----------------- ---
strlen 5
mb_strlen 5
grapheme_strlen 5
----------------- ---
str_split
+-------+---+---+---+---+---+
| index | 0 | 1 | 2 | 3 | 4 |
| value | h | e | l | l | o |
+-------+---+---+---+---+---+
mb_str_split
+-------+---+---+---+---+---+
| index | 0 | 1 | 2 | 3 | 4 |
| value | h | e | l | l | o |
+-------+---+---+---+---+---+
string
symfony/console