我有一个php代码，应该总是结束“http 500代码”，因为我有一个未定义的func status_code("OK");调用

代码：

<?

# phpinfo();

echo 'error_log = ' . ini_get('error_log') . "\n";
status_code("OK");
echo "OK";
?>

以上示例：

➜ curl -I http://localhost:8080/kkk
HTTP/1.1 500 Internal Server Error
Server: nginx/1.20.1
Date: Sat, 29 Oct 2022 18:48:25 GMT
Content-Type: text/html
Content-Length: 5597
Connection: close
ETag: "635c9b20-15dd"

在stdout输出中：

2022/10/29 18:50:32 [error] 29#29: *30 FastCGI sent in stderr: "PHP message: PHP Fatal error:  Uncaught Error: Call to undefined function status_code() in /legacy/app/index.php:4
Stack trace:

# 0 {main}

  thrown in /legacy/app/index.php on line 4" while reading response header from upstream, client: 172.17.0.1, server: localhost, request: "HEAD /kkk HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "localhost:8080"
172.17.0.1 - - [29/Oct/2022:18:50:32 +0000] 500 "HEAD /kkk HTTP/1.1" 0 "-" "curl/7.82.0" "-"

但是，如果我取消注解#phpinfo();行，我会得到200 OK：

➜ curl -I http://localhost:8080/kkk
HTTP/1.1 200 OK
Server: nginx/1.20.1
Date: Sat, 29 Oct 2022 18:52:25 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
X-Powered-By: PHP/7.1.33

在stdout中：

172.17.0.1 - - [29/Oct/2022:18:52:25 +0000] 200 "HEAD /kkk HTTP/1.1" 0 "-" "curl/7.82.0" "-"

我正在运行nginx，它具有以下配置：

location ~ \.php$ {
    root /legacy/app;
    fastcgi_pass 127.0.0.1:9000;
    fastcgi_read_timeout 10s;
    fastcgi_split_path_info ^(.+\.php)(/.+)$;
    fastcgi_index index.php;
    fastcgi_intercept_errors on;
    fastcgi_buffer_size 16k;
    fastcgi_buffers 4 16k;
}

location / {
    # make sure you have a custom html page placed in app folder
    # i.e. /legacy/app/app/50x.html
    try_files _ /index.php?$query_string;

}