Does PHP have built-in debugging logging like Ruby on Rails logger.info() to a development.log file?

Question

With PHP I'd like to look "under the hood" to see what's going on... pages served, query string values, etc.

I've Googled a bunch but can't find anything.

(I'm trying to port a web app from RoR to PHP because I need more execution speed.)

Have you profiled the app to make sure that your app really is limited by the language's execution speed? — Sam
– Sam, Commented Dec 28, 2010 at 13:36

Gordon · Accepted Answer · 2010-10-17 13:16:18Z

7

PHP has

error_log — Sends an error message to the web server's error log, a TCP port or to a file and
trigger_error — Generates a user-level error/warning/notice message

which you can use to trigger and log the predefined error types, e.g.

trigger_error( "Custom Warning", E_USER_WARNING );

Third party libraries exists with

PEAR Log and
Zend_Log

You can configure various destinations to log to. Usage is via an OO interface:

$logger->log('Informational message', Zend_Log::INFO);

and there is also the Log4J inspired

Log4PHP

Apart from that there is XDebug and Zend Debugger. There is also a PECL extension with Advanced PHP Debugger (APD)

edited Oct 17, 2010 at 13:16

answered Oct 17, 2010 at 12:36

Gordon

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3 Comments

bogeymin Over a year ago

+1 for mentioning xdebug -- it changed the way I develop for PHP.

Pete Alvin Over a year ago

I'm sorry, my question wasn't clear. I'm not looking for a "log4" utility, but an automatic diagnostic.

Gordon Over a year ago

@Pete I am not familiar with what logger does in Ruby. Sorry if my answer contains suggestions not applicable. Judging by the API docs for Logger in Ruby I'd say you are either looking for error_log or the PEAR or Zend package. XDebug and Zend Debugger are sophisticated debuggers that let you profile your code, step it through it with breakpoints and so on.

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