Magento How To Show Full Error Message Instead of Truncated One

Question

Anyone know how do you make Magento show the full error message and not truncate it with ...

example:

Warning: include() [function.include]: Filename cannot be empty  in /home/kevinmag/public_html/app/code/core/Mage/Core/Block/Template.php on line 241

0 /home/kevinmag/public_html/app/code/core/Mage/Core/Block/Template.php(241): mageCoreErrorHandler(2, 'include() [fetchView('frontend/base/d...')

I want to know what the [fetchView('frontend/base/d...') it cutting off with the ...

Answer 1

Don't blame Magento, it's all PHP's fault :) The Exception::getTraceAsString native method cuts the backtrace output, and it seems there's no normal way to handle it.

The only solution I've got to work is next:

1. I've added a function, which I got from kind sir Steve (How can I get the full string of PHP’s getTraceAsString()) to app\code\core\Mage\Core\functions.php:

   function getExceptionTraceAsString($exception) {
       $rtn = "";
       $count = 0;
       foreach ($exception->getTrace() as $frame) {
           $args = "";
           if (isset($frame['args'])) {
               $args = array();
               foreach ($frame['args'] as $arg) {
                   if (is_string($arg)) {
                       $args[] = "'" . $arg . "'";
                   } elseif (is_array($arg)) {
                       $args[] = "Array";
                   } elseif (is_null($arg)) {
                       $args[] = 'NULL';
                   } elseif (is_bool($arg)) {
                       $args[] = ($arg) ? "true" : "false";
                   } elseif (is_object($arg)) {
                       $args[] = get_class($arg);
                   } elseif (is_resource($arg)) {
                       $args[] = get_resource_type($arg);
                   } else {
                       $args[] = $arg;
                   }
               }
               $args = join(", ", $args);
           }
           $rtn .= sprintf( "#%s %s(%s): %s%s(%s)\n",
               $count,
               $frame['file'],
               $frame['line'],
               isset($frame['class']) ? $frame['class'] . '->' : '',
               $frame['function'],
               $args );
           $count++;
       }
       return $rtn;
   }
   

2. I've modified Mage.php file (printException method) - instead of $e->getTraceAsString() I've inserted getExceptionTraceAsString($e) - notice that there's two appearances: for Debug mode on, and off.

To demonstrate the results, here is an example of two backtraces - without the fix, and with the fix accordingly.

Old:

0 C:\apache\htdocs\checkout\lib\Varien\Db\Statement\Pdo\Mysql.php(110): Zend_Db_Statement_Pdo->_execute(Array)
1 C:\apache\htdocs\checkout\lib\Zend\Db\Statement.php(300): Varien_Db_Statement_Pdo_Mysql->_execute(Array)
2 C:\apache\htdocs\checkout\lib\Zend\Db\Adapter\Abstract.php(479): Zend_Db_Statement->execute(Array)
3 C:\apache\htdocs\checkout\lib\Zend\Db\Adapter\Pdo\Abstract.php(238): Zend_Db_Adapter_Abstract->query('SELECT COUNT(DI...', Array)
4 C:\apache\htdocs\checkout\lib\Varien\Db\Adapter\Pdo\Mysql.php(389): Zend_Db_Adapter_Pdo_Abstract->query('SELECT COUNT(DI...', Array)
5 C:\apache\htdocs\checkout\lib\Zend\Db\Adapter\Abstract.php(825): Varien_Db_Adapter_Pdo_Mysql->query(Object(Varien_Db_Select), Array)
6 C:\apache\htdocs\checkout\lib\Varien\Data\Collection\Db.php(217): Zend_Db_Adapter_Abstract->fetchOne(Object(Varien_Db_Select), Array)
7 C:\apache\htdocs\checkout\lib\Varien\Data\Collection.php(225): Varien_Data_Collection_Db->getSize()
8 C:\apache\htdocs\checkout\lib\Varien\Data\Collection.php(211): Varien_Data_Collection->getLastPageNumber()
9 C:\apache\htdocs\checkout\app\code\core\Mage\Eav\Model\Entity\Collection\Abstract.php(996): Varien_Data_Collection->getCurPage()
10 C:\apache\htdocs\checkout\app\code\core\Mage\Eav\Model\Entity\Collection\Abstract.php(831): Mage_Eav_Model_Entity_Collection_Abstract->_loadEntities(false, false)
11 C:\apache\htdocs\checkout\app\code\core\Mage\Review\Model\Observer.php(78): Mage_Eav_Model_Entity_Collection_Abstract->load()
12 C:\apache\htdocs\checkout\app\code\core\Mage\Core\Model\App.php(1299): Mage_Review_Model_Observer->catalogBlockProductCollectionBeforeToHtml(Object(Varien_Event_Observer))
13 C:\apache\htdocs\checkout\app\code\core\Mage\Core\Model\App.php(1274): Mage_Core_Model_App->_callObserverMethod(Object(Mage_Review_Model_Observer), 'catalogBlockPro...', Object(Varien_Event_Observer))
14 C:\apache\htdocs\checkout\app\Mage.php(416): Mage_Core_Model_App->dispatchEvent('catalog_block_p...', Array)

New:

0 C:\apache\htdocs\checkout\lib\Varien\Db\Statement\Pdo\Mysql.php(110): Zend_Db_Statement_Pdo->_execute(Array)
1 C:\apache\htdocs\checkout\lib\Zend\Db\Statement.php(300): Varien_Db_Statement_Pdo_Mysql->_execute(Array)
2 C:\apache\htdocs\checkout\lib\Zend\Db\Adapter\Abstract.php(479): Zend_Db_Statement->execute(Array)
3 C:\apache\htdocs\checkout\lib\Zend\Db\Adapter\Pdo\Abstract.php(238): Zend_Db_Adapter_Abstract->query('SELECT COUNT(DISTINCT e.entity_id) FROM `catalog_product_entity` AS `e`
 INNER JOIN `catalog_category_product_index` AS `cat_index` ON cat_index.product_id=e.entity_id AND cat_index.store_id=1 AND cat_index.visibility IN(2, 4) AND cat_index.category_id='3' AND cat_index.is_parent=1
 INNER JOIN `catalog_product_index_price` AS `price_index` ON price_index.entity_id = e.entity_id AND price_index.website_id = '1' AND price_index.customer_group_id = 0 WHERE (d=1) AND (d=1)', Array)
4 C:\apache\htdocs\checkout\lib\Varien\Db\Adapter\Pdo\Mysql.php(389): Zend_Db_Adapter_Pdo_Abstract->query('SELECT COUNT(DISTINCT e.entity_id) FROM `catalog_product_entity` AS `e`
 INNER JOIN `catalog_category_product_index` AS `cat_index` ON cat_index.product_id=e.entity_id AND cat_index.store_id=1 AND cat_index.visibility IN(2, 4) AND cat_index.category_id='3' AND cat_index.is_parent=1
 INNER JOIN `catalog_product_index_price` AS `price_index` ON price_index.entity_id = e.entity_id AND price_index.website_id = '1' AND price_index.customer_group_id = 0 WHERE (d=1) AND (d=1)', Array)
5 C:\apache\htdocs\checkout\lib\Zend\Db\Adapter\Abstract.php(825): Varien_Db_Adapter_Pdo_Mysql->query(Varien_Db_Select, Array)
6 C:\apache\htdocs\checkout\lib\Varien\Data\Collection\Db.php(217): Zend_Db_Adapter_Abstract->fetchOne(Varien_Db_Select, Array)
7 C:\apache\htdocs\checkout\lib\Varien\Data\Collection.php(225): Varien_Data_Collection_Db->getSize()
8 C:\apache\htdocs\checkout\lib\Varien\Data\Collection.php(211): Varien_Data_Collection->getLastPageNumber()
9 C:\apache\htdocs\checkout\app\code\core\Mage\Eav\Model\Entity\Collection\Abstract.php(996): Varien_Data_Collection->getCurPage()
10 C:\apache\htdocs\checkout\app\code\core\Mage\Eav\Model\Entity\Collection\Abstract.php(831): Mage_Eav_Model_Entity_Collection_Abstract->_loadEntities(false, false)
11 C:\apache\htdocs\checkout\app\code\core\Mage\Review\Model\Observer.php(78): Mage_Eav_Model_Entity_Collection_Abstract->load()
12 C:\apache\htdocs\checkout\app\code\core\Mage\Core\Model\App.php(1299): Mage_Review_Model_Observer->catalogBlockProductCollectionBeforeToHtml(Varien_Event_Observer)
13 C:\apache\htdocs\checkout\app\code\core\Mage\Core\Model\App.php(1274): Mage_Core_Model_App->_callObserverMethod(Mage_Review_Model_Observer, 'catalogBlockProductCollectionBeforeToHtml', Varien_Event_Observer)
14 C:\apache\htdocs\checkout\app\Mage.php(416): Mage_Core_Model_App->dispatchEvent('catalog_block_product_list_collection', Array)

Update: the above logic only modified Error/report output; to add this logic to Exception log as well you'll want to modify the Mage::logException method - change

self::log("\n" . $e->__toString(), Zend_Log::ERR, $file);

with

self::log("\n" . $e->getMessage() . getExceptionTraceAsString($e), Zend_Log::ERR, $file);

Hope it helps!

Answer 2

This is PHP and not Magento.

See here where the truncation is happening - https://github.com/php/php-src/blob/master/Zend/zend_exceptions.c#L383

I'd personally just live with it and use other debugging methods as opposed to hacking core files :)