[Solved] PHP trim() doesn’t work well [closed]

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When I run it and load row with 123 123 123 from excel this dont make me 123123123.

That’s what trim($str) is supposed to do: stripping whitespaces from the beginning and end of $str. Attention: only whitespace from the beginning and end. See the documentation.

To achieve what you want, simply replace all spaces with an empty string:

$subject = "123 123 123";
$output = str_replace(" ", "", $subject);
echo $output;

It outputs

123123123

solved PHP trim() doesn’t work well [closed]