Question

I want a way to log the beginning and end of the function call without explicitly making a call to a method in log object.

I know we can use xdebug to trace the flow, but I have a requirement where I have to make the functions call to be written in the log file without (having code) calling $logObj->info('Function call');.

For ex:

<?php

class something
{
    public function test()
    {
        echo "Test.";
    }
}

$some = new something();
$some->test();

?>

Now, I want to see the following entries in my out.log:

2010-08-03T09:06:15+02:00 ERR (1): Entering something::test()
...
...
2010-08-03T09:06:15+02:00 ERR (1): Leaving something::test()

Answer 1

What you need is AOP ( http://en.wikipedia.org/wiki/Aspect-oriented_programming )

But PHP doesn’t support AOP natively (there are some extensions for it, but I don’t know how good they are).

As troelskn mentioned, you should create a wrapper class (untested):

class LogWrapper
{
    protected $object;

    protected $logger;

    public function __construct($object, $logger)
    {
        $this->object = $object;
        $this->logger = $logger;
    }

    public function __call($name, $arguments) 
    {
        //log
        $returnValue = call_user_func_array(array($this->object, $name), $arguments);
        //log

        return $returnValue;
    }
}