Php 构造函数construct的前下划线是双的_

__construct(data,options,is_url,ns,is_prefix)

<?php $xmlstring = <<<XML
<?xml version="1.0" encoding="ISO-8859-1"?>
<note>
<to>George</to>
<from>John</from>
<heading>Reminder</heading>
Don't forget the meeting!
</note>
XML;

$xml = new <code>SimpleXMLElement($xmlstring)</code>;

echo $xml->body[0];
?>

Don't forget the meeting!<br>后来看construct的前_是一个，我靠，上次也是这个错误，忘了，现在记着了 <br>function __construct() <br>{} <br><br>不是 <br>function _construct() <br>{}