php解析yaml,phpyaml解析报错问题

今天用php写了一个简单的博客引擎&＃xff0c;其中要用php yaml解析器&＃xff0c;但是在使用的过程中遇到了这样的报错

[09-Dec-2017 14:54:25 PRC] PHP Warning: yaml_parse(): end of stream reached without finding document 0 in /home/twikoizo/public_html/dev/core/module/controller/page.php on line 23

page.php如下&＃xff1a;

if (!defined(&＃39;DEV&＃39;)) die(&＃39;Hay , there ! This is a part of the Twic-development-area .&＃39;);

if (!file_exists(PATH_PAGE.DS.$dev->stage().DS.&＃39;content.yaml&＃39;))

{

$dev->redirect(&＃39;error?error&＃61;404&＃39;);

exit;

}

else

{

$content_from_file &＃61; file_get_contents(PATH_PAGE.DS.$dev->stage().DS.&＃39;content.yaml&＃39;);

}

//start parsing yaml content file

$content_yaml_parsed &＃61; yaml_parse($content_from_file);

//assign the parsed content to the object

$pro->assign($content_yaml_parsed);

//load template

if ($pro->fetch(&＃39;template&＃39;) !&＃61; null)

{

require_once(PATH_MODULE.DS.&＃39;template&＃39;.DS.$pro->fetch(&＃39;template&＃39;).&＃39;.php&＃39;);

}

else

{

require_once(PATH_MODULE.DS.&＃39;template&＃39;.DS.&＃39;default.php&＃39;);

}

?>

测试的yaml文件如下&＃xff1a;

title : 开发区首页

template : default

text : >

#test content

*to be displayed there*

请问哪里出了问题&＃xff1f;讲解时附上简短代码&＃xff0c;谢谢&＃xff01;