White screen failure caused by PHP-smarty
今天遇到了一个比较大而且棘手的问题——更新了smarty的模板之后,页面白屏了,然而在预发布环境下测试的时候,并没有发现这个情况!最后,找到了原因,竟然是与smarty的模板编译原理有关。
编写一个简单的smarty页面,运行之后查看模板的编译目录,找到对应的编译文件。
<?php /*%%SmartyHeaderCode:1631756d543241d8d77-45493985%%*/if(!defined('SMARTY_DIR')) exit('no direct access allowed'); $_valid = $_smarty_tpl->decodeProperties(array ( 'file_dependency' => array ( '177dfb3e2809e44a1ff3a49d04e73219944e3fef' => array ( 0 => 'tpl\\test.htm', 1 => 1458725943, #注意到这个值1458725943为2016/3/23 17:39:03 2 => 'file', ), ......... 'has_nocache_code' => false, ),false); /*/%%SmartyHeaderCode%%*/?>
但是,出问题的smarty模板是同一个开发者开发的,而且也能确认新版本的模板文件的修改时间正确,却导致了白屏。后来,也终于查出了原因——由于文件上传过程中,修文件的修改时间为服务器的当前时间,导致了smarty编译了不完整的模板文件,导致了白屏。当模板文件上传完成之后,该文件的修改时间变成真实的修改时间,此时smarty就不会再编译了。
之前上传smarty模板一直没遇到这个问题,但是并发量高的服务器上,问题出现的概率也会提高。
解决方案:
更新模板文件后,需要清空smarty的编译目录。
以上就介绍了PHP-smarty引起的白屏故障,包括了方面的内容,希望对PHP教程有兴趣的朋友有所帮助。

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