Question

Is there a way I can set up callbacks on (or automataically log) method parameters, entries, and exits without making explicit calls within each method? I basically want to log this information to my logger class (which is static) without having to do it manually for each method.

Right now I have to call Logger::logEntry() and Logger::logExit() in every method to accomplish this. I would love to not have to do this:

class TestClass {     public function tester($arg) {         Logger::logEntry();         Logger::info('Parameter $arg => ' . $arg);          // Do some stuff...          Logger::logExit();     } } 

Answer 1

use a wrapper class. this method has the following benefits:

• no need to change your underlying class structure / method signatures
• change logging? just update this class
• update object calls vs inserting code into every class you want to log

.

class LogWatch {     function __construct($class)    {         $this->obj  =   $class;     }      function __call($method, $args) {         if (in_array($method, get_class_methods($this->obj) ) ) {             Logger::logEntry();             Logger::info('Parameter '.implode(', ', $args) );              call_user_func_array(array($this->obj, $method), $args);              Logger::logExit();          } else {             throw new BadMethodCallException();         }     } }  $test = new LogWatch(new TestClass() ); $test->tester();  // you can use instances of `LogWatch()` just like your watched class // including passing appropriate params: $test->tester($param1, $param2);