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    <p>This would be the perfect opportunity to set up a working debugger, e.g. <a href="http://xdebug.org/" rel="nofollow noreferrer">xdebug</a> and <a href="http://www.netbeans.org/features/php/" rel="nofollow noreferrer">netbeans/php</a></p> <p>edit: In lack of a "real" debugger (which is way better) a (bad) echo/assert debugger has to do</p> <ul> <li>add an error handler method to your class</li> <li>set the error handler within the the constructor</li> <li>set error_reporting=E_ALL and display_errors=On within the constructor</li> <li>set some assert options within the constructor</li> <li>add an assertion within the constructor</li> <li>add two assertions within the getUserAccount() method of your controller</li> </ul> <p>and don't forget to remove the code when you're done debugging</p> <pre><code>class YourController extends TheController{ // debug, don't forget to remove/comment out this method public static function myErrorHandler($errno, $errstr, $errfile, $errline) { $source = file($errfile); echo '&lt;fieldset&gt;&lt;legend&gt;', htmlspecialchars($errstr. ', '.$errfile.'@'.$errline), "&lt;legend&gt;&lt;pre&gt;\n"; for($i=$errline-8; $i&lt;$errline+3; $i++) { if ( isset($source[$i]) ) { echo $i+1, ': ', htmlspecialchars($source[$i]); } } echo "\n&lt;/pre&gt;&lt;/fieldset&gt;\n"; flush(); return false; } public function __construct() { set_error_handler('YourController::myErrorHandler'); // debug, don't forget to remove error_reporting(E_ALL); ini_set('display_errors', 1); // debug, don't forget to remove assert_options(ASSERT_ACTIVE, 1); // debug, don't forget to remove assert_options(ASSERT_WARNING, 1); // debug, don't forget to remove assert_options(ASSERT_BAIL, 1); // debug, don't forget to remove assert_options(ASSERT_QUIET_EVAL, 1); // debug, don't forget to remove parent::__construct(); $this-&gt;loadModel("AccountModel", "Model"); assert( is_object($this-&gt;Model) ); // debug, don't forget to remove $account = $this-&gt;getUserAccount(); } public function loadModel($model_name, $var_name) { // blah blah blah $obj = new $model_name(); $this-&gt;$var_name = $obj; } public function getUserAccount() { assert( is_object($this-&gt;Model) ); // debug, don't forget to remove assert( is_callable(array($this-&gt;Model, 'getAccount')) ); // debug, don't forget to remove $account = $this-&gt;Model-&gt;getAccount($_SESSION["account"]["user_account_id"]); } </code></pre>
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    1. COWill definitely look into xdebug, thank you.
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    2. COadded some printf-debugger code proposal. Nevertheless look into xdebug. A real debugger beats a printf-have-to-(repeatedly-)change-the-code-debugger any time.
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    3. COI used xDebug (didn't even know PHPDesigner has it, I thank you for that, will use it next time). Anyway, I solved the problem and your answer helped me quite a bit. Will update my question with the solution (it's was quite a creppy mistake :\\)
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