PHP retrieve better information from debug_backtrace without exausting memory

debugbacktrace.php

<?php
/*
 * Output example at the bottom of this gist
*/
function get_formatted_debug_backtrace() {
	$content = debug_backtrace();
	$ret = [];
	foreach($file_paths AS $file_path) {
		$var = $file_path;
		$ret[] = "File: ".$var['file'].": ".$var['line']."\n";
		$ret[] = $var['class'].$var['type'].$var['function']."(";
		$retInit = false;
		if (isset($file_path['args'])) {
			$var = $file_path['args'];
			foreach($var AS $key=>$value) {
				if (!$retInit) { $retInit = true; $ret[] = "\n"; }
				$ret[] = "\t[$key] => ";
				$type = gettype($value);
				if ($type == "string" || $type == "number") {
					$ret[] = var_export($value, true).",\n";
				} else if ($type == "array") {
					$sub = [];
					foreach ($value as $subkey=>$subvalue) {
						$subtype = gettype($subvalue);
						if ($subtype === "string") {
							$sub[] = var_export($subvalue, true);
						} else {
							$sub[] = "(".gettype($subvalue).")";
						}
					}
					$ret[] = "[".implode(", ", $sub)."],\n";
				} else {
					$ret[] = "($type),\n";
				}
			}
		}
		$ret[] = ")\n";
	}
	$formattedResult = implode("", $ret);
	return $formattedResult;
}

/* Output example below */
/*

File: /home/facasc/public_html/app/code/core/Mage/CatalogSearch/Model/Layer.php: 106
get_formatted_debug_backtrace()
File: /home/facasc/public_html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php: 254
Mage_Core_Controller_Varien_Action->dispatch(
	[0] => 'index',
)
File: /home/facasc/public_html/app/code/core/Mage/Core/Controller/Varien/Front.php: 172
Mage_Core_Controller_Varien_Router_Standard->match(
	[0] => (object),
)
File: /home/facasc/public_html/app/code/core/Mage/Core/Model/App.php: 365
Mage_Core_Controller_Varien_Front->dispatch()
File: /home/facasc/public_html/app/Mage.php: 684
Mage_Core_Model_App->run(
	[0] => ['', 'store', (array)],
)
File: /home/facasc/public_html/index.php: 83
Mage::run(
	[0] => '',
	[1] => 'store',
)

*/