php-在不同浏览器中，返回的function_exists('uc_pm_checknew')值不同
phpdiscuz
在discuz中，在页面forum_forumdisplay.php 中调用方法
[code="php"]
var_dump(function_exists('uc_pm_checknew'));
[/code]
用firefox，显示为true； 而用chrome 打开， 显示为false
于是 将 uc_pm_checknew 方法所在的文件， 重新载入。 这时 两个浏览器都返回true。
当把这个载入文件， 再次注释后， 奇怪的事。 两个浏览器现在又都返回了true。
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