json_encode.js

function json_encode(mixed_val) {
  var retVal, json = this.window.JSON;
  try {
    if (typeof json === "object" && typeof json.stringify === "function") {
      retVal = json.stringify(mixed_val);
      if (retVal === undefined) {
        throw new SyntaxError("json_encode");
      }
      return retVal;
    }
    var value = mixed_val;
    var quote = function(string) {
      var escapable = /[\\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
      var meta = {"\b":"\\b", "\t":"\\t", "\n":"\\n", "\f":"\\f", "\r":"\\r", '"':'\\"', "\\":"\\\\"};
      escapable.lastIndex = 0;
      return escapable.test(string) ? '"' + string.replace(escapable, function(a) {
        var c = meta[a];
        return typeof c === "string" ? c : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
      }) + '"' : '"' + string + '"';
    };
    var str = function(key, holder) {
      var gap = "";
      var indent = "    ";
      var i = 0;
      var k = "";
      var v = "";
      var length = 0;
      var mind = gap;
      var partial = [];
      var value = holder[key];
      if (value && typeof value === "object" && typeof value.toJSON === "function") {
        value = value.toJSON(key);
      }
      switch(typeof value) {
        case "string":
          return quote(value);
        case "number":
          return isFinite(value) ? String(value) : "null";
        case "boolean":
        ;
        case "null":
          return String(value);
        case "object":
          if (!value) {
            return "null";
          }
          if (this.PHPJS_Resource && value instanceof this.PHPJS_Resource || window.PHPJS_Resource && value instanceof window.PHPJS_Resource) {
            throw new SyntaxError("json_encode");
          }
          gap += indent;
          partial = [];
          if (Object.prototype.toString.apply(value) === "[object Array]") {
            length = value.length;
            for (i = 0;i < length;i += 1) {
              partial[i] = str(i, value) || "null";
            }
            v = partial.length === 0 ? "[]" : gap ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]" : "[" + partial.join(",") + "]";
            gap = mind;
            return v;
          }
          for (k in value) {
            if (Object.hasOwnProperty.call(value, k)) {
              v = str(k, value);
              if (v) {
                partial.push(quote(k) + (gap ? ": " : ":") + v);
              }
            }
          }
          v = partial.length === 0 ? "{}" : gap ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}" : "{" + partial.join(",") + "}";
          gap = mind;
          return v;
        case "undefined":
        ;
        case "function":
        ;
        default:
          throw new SyntaxError("json_encode");;
      }
    };
    return str("", {"":value});
  } catch (err) {
    if (!(err instanceof SyntaxError)) {
      throw new Error("Unexpected error type in json_encode()");
    }
    this.php_js = this.php_js || {};
    this.php_js.last_error_json = 4;
    return null;
  }
}
;