Content-Type: application/json; charset=utf-8
Content-Type: application/xml; charset=utf-8
Content-Type: text/html; charset=utf-8

<"\n", trim($string));
 $headings = explode(',', array_shift($rows));
 foreach( $rows as $row )
 {
 // 利用 substr 去掉 开始 与 结尾 的 "
 $data_fields = explode('","', trim(substr($row, 1, -1)));
 if (count($data_fields) === count($headings))
 {
  $data[] = array_combine($headings, $data_fields);
 }
 }

 return $data;
}

/**
 * 格式化json输出
 */
function _json($string)
{
 return json_decode(trim($string), true);
}

/**
 * 反序列化输出
 */
function _serialize($string)
{
 return unserialize(trim($string));
}

/**
 * 执行PHP脚本输出
 */
function _php($string)
{
 $string = trim($string);
 $populated = array();
 eval("\$populated = \"$string\";");

 return $populated;
}