我已经将我的Laravel项目（从windows到centos7）复制到服务器但是当我尝试从浏览器访问它时我得到了 vendor/laravel/framework/src/Illuminate/Foundation/helpers.php on line 233
服务器实际运行php 7.1
php -v
PHP 7.1.11 (cli) (built: Oct 29 2017 17:26:51) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2017 Zend Technologies
with Zend OPcache v7.1.11, Copyright (c) 1999-2017, by Zend Technologies
yum list installed | grep -i php
mod_php71w.x86_64 7.1.11-1.w7 @webtatic
php71w-bcmath.x86_64 7.1.11-1.w7 @webtatic
php71w-cli.x86_64 7.1.11-1.w7 @webtatic
php71w-common.x86_64 7.1.11-1.w7 @webtatic
php71w-dba.x86_64 7.1.11-1.w7 @webtatic
php71w-devel.x86_64 7.1.11-1.w7 @webtatic
php71w-embedded.x86_64 7.1.11-1.w7 @webtatic
php71w-fpm.x86_64 7.1.11-1.w7 @webtatic
php71w-gd.x86_64 7.1.11-1.w7 @webtatic
php71w-imap.x86_64 7.1.11-1.w7 @webtatic
php71w-interbase.x86_64 7.1.11-1.w7 @webtatic
php71w-intl.x86_64 7.1.11-1.w7 @webtatic
php71w-ldap.x86_64 7.1.11-1.w7 @webtatic
php71w-mbstring.x86_64 7.1.11-1.w7 @webtatic
php71w-mcrypt.x86_64 7.1.11-1.w7 @webtatic
php71w-mysql.x86_64 7.1.11-1.w7 @webtatic
php71w-odbc.x86_64 7.1.11-1.w7 @webtatic
php71w-opcache.x86_64 7.1.11-1.w7 @webtatic
php71w-pdo.x86_64 7.1.11-1.w7 @webtatic
php71w-pdo_dblib.x86_64 7.1.11-1.w7 @webtatic
php71w-pear.noarch 1:1.10.4-1.w7 @webtatic
php71w-process.x86_64 7.1.11-1.w7 @webtatic
php71w-pspell.x86_64 7.1.11-1.w7 @webtatic
php71w-recode.x86_64 7.1.11-1.w7 @webtatic
php71w-tidy.x86_64 7.1.11-1.w7 @webtatic
php71w-xml.x86_64 7.1.11-1.w7 @webtatic
php71w-xmlrpc.x86_64 7.1.11-1.w7 @webtatic
我一直试图降级到PHP 7.0但仍然得到错误