----------------------------------------------------------------------
Output
----------------------------------------------------------------------
string(2) "a\"
string(4) ""a\""
string(7) "b -c d\"
string(9) ""b -c d\""
--- ARG INFO ---
array(4) {
 [0]=>
 string(11) "arginfo.php"
 [1]=>
 string(4) "a" b"
 [2]=>
 string(2) "-c"
 [3]=>
  string(2) "d""
}