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PHP automatic identification of content type returned by Restful

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2017-12-25 15:05:111236browse

PHP如何针对Restful的返回内容类型进行自动识别?本文主要介绍了PHP实现自动识别Restful的返回内容类型,并实现自动自动渲染成 json、xml等数据格式输出,希望对大家有所帮助。

如题,PHP如何自动识别第三方Restful API的内容,自动渲染成 json、xml、html、serialize、csv、php等数据?

其实这也不难,因为Rest API也是基于http协议的,只要我们按照协议走,就能做到自动化识别 API 的内容,方法如下:

1、API服务端要返回明确的 http Content-Type头信息,如:


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



2、PHP端(客户端)接收到上述头信息后,再酌情自动化处理,参考代码如下:


 'xml',
 'text/xml'  => 'xml',
 'application/json' => 'json',
 'text/json'  => 'json',
 'text/csv'  => 'csv',
 'application/csv' => 'csv',
 'application/vnd.php.serialized' => 'serialize'
);

if (strpos($contentType, ';'))
{
 list($contentType) = explode(';', $contentType);
}

$contentType = trim($contentType);

if (array_key_exists($contentType, $autoDetectFormats))
{
 echo '_' . $autoDetectFormats[$contentType]($response);
}

//+++++++++++++++++++++++++++++++++++++++++++++++++++++++
// 常用 格式化 方法
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++

/**
 * 格式化xml输出
 */
function _xml($string)
{
 return $string ? (array)simplexml_load_string($string, 'SimpleXMLElement', LIBXML_NOCDATA) : array();
}

/**
 * 格式化csv输出
 */
function _csv($string)
{
 $data = array();

 $rows = explode("\n", trim($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;
}


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