if(is_numeric($str)) {
return ((float)$str == (integer)$str)
? (integer)$str
: (float)$str;
} elseif(preg_match('/^".+"$/s', $str) || preg_match('/^'.+'$/s', $str)) {
$delim = substr($str, 0, 1);
$chrs = substr($str, 1, -1);
$utf8 = '';
$strlen_chrs = strlen($chrs);
for($c = 0; $c < $strlen_chrs; $c++) {
$substr_chrs_c_2 = substr($chrs, $c, 2);
$ord_chrs_c = ord($chrs{$c});
if($substr_chrs_c_2 == 'b') {
$utf8 .= chr(0x08); $c+=1;
} elseif($substr_chrs_c_2 == 't') {
$utf8 .= chr(0x09); $c+=1;
} elseif($substr_chrs_c_2 == 'n') {
