In order to shut down a less important level of logging e. Unlike application logs and error logs that you can write to, server logs are exclusively written to by the corresponding server daemons e. Note: This is an intentionally oversimplified nginx config file that is provided for example purposes only.
This shows that, for serving one page, the browser actually performs 9 HTTP calls. However, they still take network resources and this is what can be optimized by using various sprites and minification techniques. Remember that nginx location performs simple regular expression matching, so you can include as many static contents extensions as you expect to dispatch on your site.
Another convenient thing about nginx logs is the debug log. Although the debug log can indeed be verbose a single nginx request, for example, generated KB of log data! Wading through a log file may be cumbersome and tedious, but it can often quickly provide clues and information that greatly help accelerate the debugging process. In particular, the debug log can really help with debugging nginx configurations, especially the most complicated parts, like location matching and rewrite chains.
Of course, debug logs should never be enabled in a production environment. Another type of server log useful for debugging is data storage logs. In MySQL, you can turn them on by adding these lines:. These logs simply contain a list of queries run by the system while serving database requests in chronological order, which can be helpful for various debugging and tracing needs. PHP itself provides functions for opening, writing to, and closing log files openlog , syslog , and closelog , respectively.
There are also numerous logging libraries for the PHP developer, such as Monolog popular among Symfony and Laravel users , as well as various framework-specific implementations, such as the logging capabilities incorporated into CakePHP.
Generally, libraries like Monolog not only wrap syslog calls, but also allow using other backend functionality and tools. Note that these changes total a mere 15 extra lines of code, but can collectively yield a wealth of information. Actually there are two points worth mentioning here. First, the two requests per page load is for using Symfony in dev mode which I have done throughout this article. As we saw earlier in the nginx access logs, there are actually more HTTP calls, some of which are for static content.
This tells us that there were 2 page loads of the site root. Here we used the unique ID of a request to check all log messages related to that single request. As expected in this simple test case, only my host computer has accessed the site. This is of course a very simplistic example, but the capability that it demonstrates of being able to analyse the sources of the traffic to your site is obviously quite powerful and important.
Having 1bcd as the hash of my Firefox User-Agent, I can answer this question as follows:. No, Symfony standard uses only URL slugs, so this also tells us here that no one has attempted to hack the site.
These are just a handful of relatively rudimentary examples of the ways in which logs files can be creatively leveraged to yield valuable usage information and even basic analytics.
Another heads-up is for security. You might think that logging requests is a good idea, in most cases it indeed is. Since log files are text files to which you always append information, they are constantly growing.
Since this is a well-known issue, there are some fairly standard approaches to controlling log file growth. Another, more advanced approach is to make rsyslogd itself write messages into files, dynamically created based on current date and time.
This would still require a custom solution for removal of older files, but lets devops manage timeframes for each log file precisely.
For our example:. As the project grows, parsing information from logs gets more and more resource hungry.
These two frameworks, when used together, are capable of providing highly unique solutions, like creating a login form.
The element displays the heading of the document. The label can be only in the text format, and it shows the text in the browser's tab. Next comes the CSS sheet.
Now, the aim is to create a cascading style sheet CSS file to improve the design of the webpage. When the user submits the input values, they will be verified against the credentials stored in the database. Here, if the username and password are matched, the user will be taken to the next webpage.
Otherwise, the login attempt will be rejected. Now, start your SQL Xampp server and select admin. This will direct you to the phpMyAdmin webpage. Trejder — Your suggestions are welcome. I made changes and now PHP class takes care for default log file on Windows. Date from log file name is also removed. Ooooo, close! The only thing missing is rotation. If you write a log, there has to be a way to limit its size. I just made a few changes: 1. I added a optional property to set a max size for the log file, with a default of 1 Meg:.
This will be useful for others. Your suggestion about adding date to the timestamp format is applied to Logging class. Class now looks simpler — thanks! Thank you!
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