w避免加载外部实体字符。
http://php.net/manual/en/function.libxml-disable-entity-loader.php
libxml_disable_entity_loader — Disable the ability to load external entities
$disable
= true ] )Disable/enable the ability to load external entities.
Returns the previous value.
LIBXML_NONET
constant原文:http://www.cnblogs.com/yuanjiangw/p/6347075.html