laravel 5.2 custom log file for different tasks

Question

Can we create a custom log file for different purposes in laravel 5.2 like for order related log entries that should be in order.log and for payment related stuff the entry shou

Answer 1

Here you go... I've spent so much time to add custom functionality to Monolog which able to do THAT in a proper way. I tried sooooo many different ways, but all was a bit hacky. Finally I found a good way to get this functionality working....

As the application is big, I needed separate log files, and maintain the existing Laravel's Log interface as much as possible. I needed something like:

Log::write('audit', 'User logged in to the app.');
Log::info('event', 'User sent out 2 emails.');

The Solution:

App\Providers\AppServiceProvider.php (add to register function)

//Facade to Object binding
$this->app->bind('chanellog', 'App\Helpers\ChannelWriter');

config\app.php (add to aliases)

//Custom Alias Class
'ChannelLog' => App\Contracts\Facades\ChannelLog::class,

App\Contracts\Facades\ChannelLog.php

App\Helpers\ChannelWriter.php

 [ 
            'path' => 'logs/audit.log', 
            'level' => Logger::INFO 
        ],
        'audit' => [ 
            'path' => 'logs/audit.log', 
            'level' => Logger::INFO 
        ]
    ];

    /**
     * The Log levels.
     *
     * @var array
     */
    protected $levels = [
        'debug'     => Logger::DEBUG,
        'info'      => Logger::INFO,
        'notice'    => Logger::NOTICE,
        'warning'   => Logger::WARNING,
        'error'     => Logger::ERROR,
        'critical'  => Logger::CRITICAL,
        'alert'     => Logger::ALERT,
        'emergency' => Logger::EMERGENCY,
    ];

    public function __construct() {}

    /**
     * Write to log based on the given channel and log level set
     * 
     * @param type $channel
     * @param type $message
     * @param array $context
     * @throws InvalidArgumentException
     */
    public function writeLog($channel, $level, $message, array $context = [])
    {
        //check channel exist
        if( !in_array($channel, array_keys($this->channels)) ){
            throw new InvalidArgumentException('Invalid channel used.');
        }

        //lazy load logger
        if( !isset($this->channels[$channel]['_instance']) ){
            //create instance
            $this->channels[$channel]['_instance'] = new Logger($channel);
            //add custom handler
            $this->channels[$channel]['_instance']->pushHandler( 
                new ChannelStreamHandler( 
                    $channel, 
                    storage_path() .'/'. $this->channels[$channel]['path'], 
                    $this->channels[$channel]['level']
                )
            );
        }

        //write out record
        $this->channels[$channel]['_instance']->{$level}($message, $context);
    }

    public function write($channel, $message, array $context = []){
        //get method name for the associated level
        $level = array_flip( $this->levels )[$this->channels[$channel]['level']];
        //write to log
        $this->writeLog($channel, $level, $message, $context);
    }

    //alert('event','Message');
    function __call($func, $params){
        if(in_array($func, array_keys($this->levels))){
            return $this->writeLog($params[0], $func, $params[1]);
        }
    }

}

App\Helpers\ChannelStreamHandler.php

channel = $channel;

        parent::__construct($stream, $level, $bubble);
    }

    /**
     * When to handle the log record. 
     * 
     * @param array $record
     * @return type
     */
    public function isHandling(array $record)
    {
        //Handle if Level high enough to be handled (default mechanism) 
        //AND CHANNELS MATCHING!
        if( isset($record['channel']) ){
            return ( 
                $record['level'] >= $this->level && 
                $record['channel'] == $this->channel 
            );
        } else {
            return ( 
                $record['level'] >= $this->level
            );
        }
    }

}

After this, you can do in any file:

use ChannelLog as Log;
...
function myFunction(){
    //Recommended (writes INFO to logs/event.log)
    Log::write('event', 'User sent out 3 voucher.')
    //Possible to use (writes ALERT to logs/audit.log)
    Log::alert('audit', 'User modified xyz entry.')
    //Or even: 
    Log::write('audit', 'User modified xyz entry.', ['user'=>1])
}