正则表达式匹配数字和完整的sto并用空char替换它

I am trying to match digit and . and replacing it with "" no char.

$buffer= "test. 8090";

if PREG_REPLACE('/[0-9]+[.]/', '', $buffer)
{
echo $buffer;
}

http://ideone.com/KgFm3I

What's wrong here? gives syntex error

Put both digit and dot inside the character class []

$new_str = PREG_REPLACE('/[0-9.]+/', '', $buffer);
                              ^ here goes the dot

Don't put preg_replace inside the if statement,it doesnot return true or false.

Change the regex pattern like this \([\d+.])\

preg_replace("/[.\d]+/", "", $buffer);