The easiest would be to use explode
:
$words = explode(' ', $str);
But that does only accept fixed separators. split
an preg_split
do accept regular expressions so that your words can be separated by multiple spaces:
$words = split('\s+', $str);
// or
$words = preg_split('/\s+/', $str);
Now you can additionally remove leading and trailing spaces with trim
:
$words = preg_split('/\s+/', trim($str));