Question

I am trying to pass my array of lat and lng to my PHP script so that the script can save it to an .txt file.

i manage to serialize my array and pass it to the php script… and on the php side, i manage to unserialize it. However, when i write the array to the file, the file only show as “array array array” … and not the value… suppose to be “(1.3567, 103.124252) (1.3543, 103.436435)”.

Below is my sample code (to serialize):

function serialize(mixed_value) 
   { 
    var _getType = function( inp ) {
    var type = typeof inp, match;
    var key;
    if (type == 'object' && !inp) {
     return 'null';
    }
    if (type == "object") {
     if (!inp.constructor) {
      return 'object';
     }
     var cons = inp.constructor.toString();
     match = cons.match(/(\w+)\(/);
     if (match) {
      cons = match[1].toLowerCase();
     }
     var types = ["boolean", "number", "string", "array"];
     for (key in types) {
      if (cons == types[key]) {
       type = types[key];
       break;
      }
     }
    }
    return type;
   };
   var type = _getType(mixed_value);
   var val, ktype = '';

   switch (type) {
    case "function": 
     val = ""; 
     break;
    case "undefined":
     val = "N";
     break;
    case "boolean":
     val = "b:" + (mixed_value ? "1" : "0");
     break;
    case "number":
     val = (Math.round(mixed_value) == mixed_value ? "i" : "d") + ":" + mixed_value;
     break;
    case "string":
     val = "s:" + mixed_value.length + ":\"" + mixed_value + "\"";
     break;
    case "array":
    case "object":
     val = "a";
     var count = 0;
     var vals = "";
     var okey;
     var key;
     for (key in mixed_value) {
      ktype = _getType(mixed_value[key]);
      if (ktype == "function") { 
       continue; 
      }

      okey = (key.match(/^[0-9]+$/) ? parseInt(key, 10) : key);
      vals += serialize(okey) +
        serialize(mixed_value[key]);
      count++;
     }
     val += ":" + count + ":{" + vals + "}";
     break;
   }
   if (type != "object" && type != "array") {
     val += ";";
    }
   return val;
   }

PHP (to unserialize and paste to file):

$data = $_POST['y'];

$arr = unserialize($data); 

$fp=fopen("route.txt","w+");
foreach($arr as $key => $value){
fwrite($fp,$value."\t");
}

THANKS FOR ALL YOUR HELP! 😀

Answer 1

1. Reinvent wheels much? 🙂 There’s already JSON for expressly this purpose, and there are a ton of libraries out there for en- and decoding JSON in just about any language. PHP comes with json_decode.
2. When writing to the file, $value itself is an array. When an array is cast to a string (as is necessary for outputting it), it’ll be cast to the string “Array”. Use join(',', $value) to output all values of the array separated by commas.