A non well formed numeric value encountered [zabbix.php:21 → require_once() → ZBase->run() → ZBase->processRequest() → CView->getOutput() → include() → make_status_of_zbx() → CFrontendSetup->checkRequirements() → CFrontendSetup->checkPhpMemoryLimit() → str2mem() in include/func.inc.php:410]
A non well formed numeric value encountered [zabbix.php:21 → require_once() → ZBase->run() → ZBase->processRequest() → CView->getOutput() → include() → make_status_of_zbx() → CFrontendSetup->checkRequirements() → CFrontendSetup->checkPhpPostMaxSize() → str2mem() in include/func.inc.php:410]
A non well formed numeric value encountered [zabbix.php:21 → require_once() → ZBase->run() → ZBase->processRequest() → CView->getOutput() → include() → make_status_of_zbx() → CFrontendSetup->checkRequirements() → CFrontendSetup->checkPhpUploadMaxFilesize() → str2mem() in include/func.inc.php:410]
安装完成之后启动就出现这个问题，这个是因为PHP 7.1.0类型强化，处理方法也很简单找到Zabbix WEB目录下include/func.inc.php文件
sed -i '/$last = strtolower(substr($val, -1));/a$val = substr($val,0,-1);' /home/www/zabbix/include/func.inc.php
注意一下文件路径即可。
一些Zabbix相关教程集合：
CentOS 7.2 安装部署 Zabbix 3.0.4 详解
Ubuntu 14.04下Zabbix2.4.5 源码编译安装 .com/Linux/2015-05/117657.htm