如何在magento 1.7中打开开发人员模式？

Question

I go through this tutorial and my problem consists in the fact that I do not get any function.include error on "The Global Config and Creating The Model" section (when assigning to a variable Mage::getModel('weblog/blogpost') , while the model doesn't exists yet ).

At some point I found in /index.php an if statement in which is called the following method: Mage::setIsDeveloperMode(true); To test it, I put it outside the if statement (which I know is not good practice).

The result was that I got this warning message:

Warning: simplexml_load_string() [function.simplexml-load-string]: Entity: line 1: parser error : XML declaration allowed only at the start of the document  in /home/dowebro/public_html/magento/lib/Varien/Simplexml/Config.php on line 510

#0 [internal function]: mageCoreErrorHandler(2, 'simplexml_load_...', '/home/dowebro/p...', 510, Array)
#1 /home/dowebro/public_html/magento/lib/Varien/Simplexml/Config.php(510): simplexml_load_string('    loadString('    loadFile('/home/dowebro/p...')
#4 /home/dowebro/public_html/magento/app/code/core/Mage/Core/Model/Config.php(318): Mage_Core_Model_Config->loadModulesConfiguration(Array, Object(Mage_Core_Model_Config))
#5 /home/dowebro/public_html/magento/app/code/core/Mage/Core/Model/App.php(414): Mage_Core_Model_Config->loadModules()
#6 /home/dowebro/public_html/magento/app/code/core/Mage/Core/Model/App.php(343): Mage_Core_Model_App->_initModules()
#7 /home/dowebro/public_html/magento/app/Mage.php(683): Mage_Core_Model_App->run(Array)
#8 /home/dowebro/public_html/magento/index.php(91): Mage::run('', 'store')
#9 {main}

but still no error which I would expect.

So, how can I get rid of this Warning message, but more important, how can I see errors in developement mode?

Thank you!

EDIT: While I go on with this tutorial, I see that I don't get any kind of feedback from core classes. Ex: I should get "Can't retrieve entity config: weblog/blogpost" while trying yo get data from a model of which resource definition is incomplete. Well, I don't. :|

Answer 1

Developer mode is a sort of use strict for PHP and Magento. It forces you to fix everything . If looks like the simplexml_load_string function doesn't like one of the XML configuration files in your system. You can find out which one by going to line 510 in

/home/dowebro/public_html/magento/lib/Varien/Simplexml/Config.php

and var dumping the variable that's being passed to loadFile .

Based on the error message

XML declaration allowed only at the start of the document

My guess is your config.xml XML prolog has some whitespace before it

[    ]<?xml version=...

or you've accidentally added a <? somewhere in your XML file.

Answer 2

I don't know why my post got deleted. Mods I can't even message you back.

I followed the same tutorial as @Michael did and encountered the same problem.

The solution is going to root of application index.php and remove hash from the front of below statement

#ini_set('display_errors', 1)

to

ini_set('display_errors', 1)

Answer 3

I have this problem and i can solve debugging the file app\\code\\core\\Mage\\Core\\Model\\Config.php

In this class search the metod loadModulesConfiguration and im sure that you have the following code:

foreach ($fileName as $configFile) {
    $configFile = $this->getModuleDir('etc', $modName).DS.$configFile;
    if ($mergeModel->loadFile($configFile)) {
         $mergeToObject->extend($mergeModel, true);
    }
}

And this add a block try catch like this :

foreach ($fileName as $configFile) {
    try {
        $configFile = $this->getModuleDir('etc', $modName).DS.$configFile;
        if ($mergeModel->loadFile($configFile)) {
            $mergeToObject->extend($mergeModel, true);
        }
    } catch(Exception $e) {
        Mage::log($configFile);
    }
 }

And then check the log and you will have the name of the file that is the problem