php 接收微信推送事件参数

$post_str = $GLOBALS["HTTP_RAW_POST_DATA"];
if(empty($post_str)) {
echo "";
exit;
}

$post_obj = simplexml_load_string($post_str, 'SimpleXMLElement', LIBXML_NOCDATA);

$log_path_all = sprintf(WEIXIN_PUSH_EVENT_LOG_PATH, 'weixin_push_all.log');
error_log('获取活动关键词信息失败：'.date("Y-m-d H:i:s", time()).'-'.json_encode((array)$post_obj)."\n", 3, $log_path_all);