“`
// 本地环境phpStudy, PHP7.1.13nts+nginx,切换Apache也不行
//ps:php版本<=7.0正常
echo “<pre>”;
// $_SERVER获取，正常
var_dump($_SERVER[‘SERVER_PORT’]);
// 获取其他环境变量，正常
var_dump($_SERVER[‘REMOTE_ADDR’]);
// 第二个参数设为true，正常
var_dump(getenv(‘REMOTE_ADDR’, true));
// 崩溃，直接报fastcgi停止运行
var_dump(getenv(‘REMOTE_ADDR’));
“`
Nginx 错误日志
2018/07/20 11:54:13 [error] 10192#8652: *1 WSARecv() failed (10054: An existing connection was forcibly closed by the remote host) while reading response header from upstream, client: 127.0.0.1, server: localhost, request: “GET / HTTP/1.1”, upstream: “fastcgi://127.0.0.1:9000”, host: “127.0.0.1”
分割线
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查阅php手册发现正好php7.1.13和7.2.10有此问题，本地环境恰好是这两个版本，更换版本即可。
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