pbootcms上传附件失败报错UNKNOW: Code: 8192; Desc: stripos():解决方法

UNKNOW: Code: 8192; Desc: stripos(): Non-string needles will be interpreted as strings in the future. Use an explicit chr() call to preserve the current behavior; File: /www/wwwroot/aaa.xxxx.com/core/function/file.php; Line: 176;

if(stripos($types,$ext)!==false)

if(stripos($types,chr($ext))!==false)