In app/code/core/Mage/Core/functions.php Magento offers a function named mageDebugBacktrace() which is nice, but I thought could be made nicer. This backtrace shows frame numbers, file names and line numbers, classes, methods and arguments where possible. It can be placed anywhere you fancy, as long as it is included by Magento - I normally add it to functions.php when needed, and remove when I'm done.
Example output:
[ 0] app/code/core/Enterprise/Search/Model/Adapter/Abstract.php:414 Enterprise_Search_Model_Adapter_HttpStream->_search('art', Array)
[ 1] app/code/core/Enterprise/Search/Model/Resource/Engine.php:113 Enterprise_Search_Model_Adapter_Abstract->getIdsByQuery('art', Array)
[ 2] app/code/core/Enterprise/Search/Model/Resource/Collection.php:352 Enterprise_Search_Model_Resource_Engine->getIdsByQuery('art', Array)
[ 3] app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php:825 Enterprise_Search_Model_Resource_Collection->_beforeLoad()
[ 4] app/code/core/Mage/Review/Model/Observer.php:78 Mage_Eav_Model_Entity_Collection_Abstract->load()
[ 5] app/code/core/Mage/Core/Model/App.php:1299 Mage_Review_Model_Observer->catalogBlockProductCollectionBeforeToHtml(Varien_Event_Observer)
[ 6] app/code/core/Mage/Core/Model/App.php:1274 Mage_Core_Model_App->_callObserverMethod(Mage_Review_Model_Observer, 'catalogBlockProductCollectionBeforeToHtml', Varien_Event_Observer)
[ 7] app/Mage.php:416 Mage_Core_Model_App->dispatchEvent('catalog_block_product_list_collection', Array)
[ 8] app/code/core/Mage/Catalog/Block/Product/List.php:163 Mage::dispatchEvent('catalog_block_product_list_collection', Array)
[ 9] app/code/core/Mage/Core/Block/Abstract.php:802 Mage_Catalog_Block_Product_List->_beforeToHtml()
[10] app/code/core/Mage/Core/Block/Abstract.php:570 Mage_Core_Block_Abstract->toHtml()
[11] app/code/core/Mage/Core/Block/Abstract.php:514 Mage_Core_Block_Abstract->_getChildHtml('search_result_list', '1')
(and so on...)
Code:
function niceDebugBacktrace()
{
$d = debug_backtrace();
array_shift($d);
$out = '';
$c1width = strlen(count($d) + 1);
$c2width = 0;
foreach ($d as &$f) {
if (!isset($f['file'])) $f['file'] = '';
if (!isset($f['line'])) $f['line'] = '';
if (!isset($f['class'])) $f['class'] = '';
if (!isset($f['type'])) $f['type'] = '';
$f['file_rel'] = str_replace(BP . DS, '', $f['file']);
$thisLen = strlen($f['file_rel'] . ':' . $f['line']);
if ($c2width < $thisLen) $c2width = $thisLen;
}
foreach ($d as $i => $f) {
$args = '';
if (isset($f['args'])) {
$args = array();
foreach ($f['args'] as $arg) {
if (is_object($arg)) {
$str = get_class($arg);
} elseif (is_array($arg)) {
$str = 'Array';
} elseif (is_numeric($arg)) {
$str = $arg;
} else {
$str = "'$arg'";
}
$args[] = $str;
}
$args = implode(', ', $args);
}
$out .= sprintf(
"[%{$c1width}s] %-{$c2width}s %s%s%s(%s)\n",
$i,
$f['file_rel'] . ':' . $f['line'],
$f['class'],
$f['type'],
$f['function'],
$args
);
}
return $out;
}
Usage:
echo niceDebugBacktrace();
Posted by Mike Whitby to Magento (2012-04-26 15:33)