Description:
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preg_replace not matching, where it should match n(same for preg_match)

Reproduce code:
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$regex='/(.*)<[^>]*submenu[^>]*>/mis';
$str is on url: http://www.koopjespakker.nl/test/preg_match_data/str_for_php.txt

$modified_string = preg_replace( $regex, 'sss', $str);


Expected result:
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a replaced string (other then the input string, $str)

Actual result:
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"" (preg_replace return nothing)