PHP-FPM with NGINX - Error log missing line breaks after update - php

Question

I'm working on a update for a old system whose versions are PHP7.1, NGINX 1.10.1 on an old Ubuntu 14.04.4.
The apps logs were displayed like this:
2022/03/10 07:05:40 [error] 23694#23694: *89040 FastCGI sent in stderr: "PHP message: .
PHP message: ..................................................[ Developer Version ]
PHP message: .
PHP message: Started GET / (1.2.3.4:34210)
PHP message: Parameters = []
PHP message: Resource Selected: ControllerName
PHP message: Session started: [123 , (**anon**)]
PHP message: Response = {"class":"HtmlResponse","code":200}" while reading response header from upstream, client: 1.2.3.4, server: oldserver.com, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php7.1-fpm.sock:", host: "4.3.2.1"
However, after upgrading to Ubuntu 20.04.4, PHP 8.0.16 and Nginx 1.18.0 all my logs are clumped together without the line breaks, like this:
2022/03/10 07:49:17 [error] 44423#44423: *1 FastCGI sent in stderr: "PHP message: .PHP message: ..................................................[ Developer Version ]PHP message: .PHP message: Started GET /url-name (1.2.3.4:58262)PHP message: Parameters = []PHP message: Resource Selected: ControllerName message: Session started: [abc123 , (**anon**)]PHP message: Response = {"class":"HtmlResponse","code":200}" while reading response header from upstream, client: 1.2.3.4, server: servername.com, request: "GET /url-name HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php8.0-fpm.sock:", host: "servername.com"
The logs are created on dispatch.php file like this:
$logger->error('.');
$logger->error('..................................................[ Developer Version ]');
$logger->error('.');
And the $logger class basically calls the error_log method
error_log($pf.$msg);
Does anyone know to resolve this? Help appreciated, please

Answer 1

Just add new line
error_log( $pf . $msg . "\n");