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run code in 150+ php & hhvm versions
Bugs & Features
<?php $configArray = array( 'grand_total' => array( 'after' => array(), 'before' => array(), '_code' => 'grand_total', ), 'discount' => array( 'after' => array(), 'before' => array('grand_total'), '_code' => 'discount', ), ); reset($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']); } } print_r(array_keys($configArray));
based on Q6Rpc
Output for 4.3.0 - 7.1.0
Array ( [0] => grand_total [1] => discount )