preg_replace add “00” after $1 without spaces in Replacement

[many13]

Im trying to add "00" after $1 without spaces in preg_replace replacement.My code:\[code\]$count = null;$returnValue = http://stackoverflow.com/questions/15845129/preg_replace('/de(.*)y/i', '$1 00', 'delipsumy', -1, $count);\[/code\]I want have something like '$1'.'00' for the replacement where the output should be:\[quote\] lipsum00 (without any space)\[/quote\]I already tried something like '$1'.'00' and '$100' but doesnt workAny suggestion?