PHP implementation code to convert POST data into string

/**
 * 应用于LOG记录POST参数使用
 *
 * @version 0.0.1
 * @Author Chenjl <ciwdream@gmail.com>
 *
 * @return string
 */
function getPostLog(array $_data = array(),$n = &#39;&#39;){
 $_gPOST = empty($_data) ? I(&#39;post.&#39;) : $_data;
 $_rs = array();
 foreach ($_gPOST AS $name=>$value){
  if( is_array($value) ){
   $_rs[] = getPostLog($value,$name);
  }else{
   if( !empty($_data) ){
    $_rs[] = $n.&#39;[&#39;.$name.&#39;]&#39;.&#39;=&#39;.$value;
   }else{
    $_rs[] = $name.&#39;=&#39;.$value;
   }
  }
 }
 $_rs = implode(&#39;&&#39;, $_rs);
 return $_rs;
}