PHP preg_split只在一行中删除了尾随空格？

How can i get rid of trailing spaces in preg_split result without using preg_replace to first remove all spaces from $test string?

$test   = 'One , Two,   Thee   ';
$test   = preg_replace('/\s+/', ' ', $test);
$pieces = preg_split("/[,]/", $test);

If it must be preg_split() (you actually required that in the question) then this might help:

$test   = 'One , Two,   Thee   ';
$pieces = preg_split("/\s*,\s*/", trim($test), -1, PREG_SPLIT_NO_EMPTY);

trim() is used to remove space before the first and behind the last element. (which preg_split() doesn't do - it removes only spaces around the commas)

I would do it like this:

$test = 'One , Two,   Thee   ';
$pieces = array_map('trim', explode(',', $test));
print_r($pieces);

So yeah, great one there by @Kaii, meanwhile, based on a tip from his solution, I modified my code from :

function splitStringToArray($str){
    return preg_split('/\s+/', $str);
}

To :

function splitStringToArray($str){
    return preg_split('/\s+/', trim($str));
}

And now am getting the exact results I want, NO tailing space(s) in words process function. Hope this also helps someone. Cheers.