$re = '/[a-z] + [^0-9\s.]+|\.(?!\d)/';
$str = 'asdsad $59.33 9. .3 as.df 2 asdf 56 89 .a 2.4 wef 95 as.5df. 67.990 dssdgsfh.gdfgdlkblbllgff.njyn.j.njljn.jn.j.jnjnn.jn.n.n.vvfbvhfbhbfhbvhfbvhf.ghfghrughu.gktigjti';
$subst = "";
$result = preg_replace($re, $subst, $str);
echo "The result of the substitution is ".$result;
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php