<?php

use Psr\Log\AbstractLogger;
use Psr\Log\LogLevel;

// abstract from composer package psr/log
class Logger extends AbstractLogger
{
    public function log($level, $message, array $context = array())
    {
        $msg = (new DateTime())->format(DateTime::ISO8601);
        $msg .= sprintf(' [%s] %s', $level, $message) . PHP_EOL;
        
        if (array() !== $context) {
            $search = array_keys($context);
            array_walk($search, function(&$value, $key) {
                $value = sprintf('{%s}', $value);
            });
            $replace = array_values($context);
        
            $msg = str_replace($search, $replace, $msg);
        }
        
        // write log (usually into a file)
        echo $msg;
    }
}

$log = new Logger();
$log->error('an error happened in {file}', array('file' => 'foo.php'));
$log->notice('{reason} happened, but I work anyway', array('reason' => 'stuff'));
$log->warning('There is something strange in {method}. Better take a look', array('method' => 'bar()'));

2024-04-18T11:00:15+0200 [error] an error happened in foo.php
2024-04-18T11:00:15+0200 [notice] stuff happened, but I work anyway
2024-04-18T11:00:15+0200 [warning] There is something strange in bar(). Better take a look

PHP 8.2, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8