The regular partition character

Regular split character
string is
UL[CLASS=XL XL2 CL] div.test Ul[id=test]

I want to use a space to split the character, but the [] number inside the space do not divide, only the regular can achieve this function? For example, the results are as follows
UL[CLASS=XL XL2 CL]
Div.test
Ul[id=test]

If the regular can't be achieved, what are the other ideas?

------Solution--------------------

PHP Code

$s = ' UL[CLASS=XL XL2 cl] div.test Sasa Ul[id=test] ';p reg_match_all ('/\w+\[[^]]+]| [^\s]+/', $s, $r);p Rint_r ($r);
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