PHP preg_plit() with line breaks but prevent multi line jumps

I would like to preg_split() a string every new line, only line with content (no multi line jumps)

I tried this (\S*)\n|$

For example:

last_name, first_name

bjorge, philip
kardashian, kim
mercury, freddie

my preg_split

(\S*)\n|$

array(2
0   =>  last_name, first_name
1   =>  
)
array(2
0   =>  
1   =>  
)
array(2
0   =>  bjorge, philip
1   =>  
)
array(2
0   =>  kardashian, kim
1   =>  
)
array(2
0   =>  mercury, freddie
1   =>  
)

What I would like as an array:

array(2
0   =>  last_name, first_name
)
array(2
0   =>  bjorge, philip
)
array(2
0   =>  kardashian, kim 
)
array(2
0   =>  mercury, freddie    
)