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$string1 = preg_replace('/[^A-Za-z0-9äöü!&_=\+-]/', ' ', $string4);
This Regex shouldn’t replace the chars äöü.
In Ruby it worked as expected.
But in PHP it replaces also the ä ö and ü.
Can someone give me a hint how to fix it?
Set the
upattern modifier (to tell php to treat the regex as a UTF-8 string).