function newArrayToJson($array)
{
  if(!is_array($array))
  {
    return '';
  }
  $func = __FUNCTION__;
  //關(guān)鍵判斷是不是關(guān)聯(lián)數(shù)組，以此來(lái)決定是否需要json加密key和使用[]
  $associative = (array_keys($array) !== range(0, count($array) - 1)) ? true : false;
  if($associative && !empty($array))
  {
    $construct = array();
    foreach($array as $key => $value)
    {
      $key = '"'.$key.'"';
      if(is_array($value))
      {
        $value = $func($value);
      }
      elseif(!is_numeric($value))
      {
        $value = '"'.$value.'"';
      }
      $construct[] = "$key:$value";
    }
    $result = "{".implode(",",$construct)."}";
  }
  else
  {
    $construct = array();
    foreach($array as $value)
    {
      if(is_array($value))
      {
        $value = $func($value);
      }
      else if(!is_numeric($value))
      {
        $value = '"'.$value.'"';
      }
      $construct[] = $value;
    }
    $result = "[".implode(",", $construct)."]";
  }
  return $result;
}

//測(cè)試：
$arr=array('1'=>'www.dhdzp.com','2'=>'www.baidu.com','3'=>'www.sina.com.cn','4'=>'腳本之家');
echo newArrayToJson($arr);
/*
運(yùn)行結(jié)果：
{"1":"www.dhdzp.com","2":"www.baidu.com","3":"www.sina.com.cn","4":"腳本之家"}
*/