Online PHP editor | output for b4IoE

<?php $configArray = array( 'grand_total' => array( 'class' => 'sales/quote_address_total_grand', 'after' => array( 0 => 'subtotal', ), 'renderer' => 'tax/checkout_grandtotal', 'admin_renderer' => 'adminhtml/sales_order_create_totals_grandtotal', 'before' => array(), '_code' => 'grand_total', ), 'discount' => array( 'class' => 'salesrule/quote_discount', 'after' => array( 0 => 'subtotal', 1 => 'shipping', ), 'before' => array( 0 => 'grand_total', ), 'admin_renderer' => 'adminhtml/sales_order_create_totals_discount', 'renderer' => 'amrules/checkout_discount', '_code' => 'discount', ), ); function compareTotals($a, $b) { $aCode = $a['_code']; $bCode = $b['_code']; if (in_array($aCode, $b['after']) || in_array($bCode, $a['before'])) { $res = -1; } elseif (in_array($bCode, $a['after']) || in_array($aCode, $b['before'])) { $res = 1; } else { $res = 0; } return $res; } reset($configArray); $element = current($configArray); foreach ($configArray as $code => $data) { foreach ($data['before'] as $beforeCode) { if (!isset($configArray[$beforeCode])) { continue; } $configArray[$code]['before'] = array_unique(array_merge( $configArray[$code]['before'], $configArray[$beforeCode]['before'] )); $configArray[$beforeCode]['after'] = array_merge( $configArray[$beforeCode]['after'], array($code), $data['after'] ); $configArray[$beforeCode]['after'] = array_unique($configArray[$beforeCode]['after']); } foreach ($data['after'] as $afterCode) { if (!isset($configArray[$afterCode])) { continue; } $configArray[$code]['after'] = array_unique(array_merge( $configArray[$code]['after'], $configArray[$afterCode]['after'] )); $configArray[$afterCode]['before'] = array_merge( $configArray[$afterCode]['before'], array($code), $data['before'] ); $configArray[$afterCode]['before'] = array_unique($configArray[$afterCode]['before']); } } uasort($configArray, 'compareTotals'); print_r($configArray);