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<?php $array = [ ['invoice_id' => '72,', 'item' => 'SN00001'], ['invoice_id' => '73,', 'item' => 'SN00002'], ['invoice_id' => '73,', 'item' => 'SN00003'], ['invoice_id' => '73,', 'item' => 'SN00004'], ['invoice_id' => '74,', 'item' => 'SN00005'], ['invoice_id' => '74,', 'item' => 'SN00006'] ]; $result = []; foreach ($array as $row) { $result[$row['invoice_id']]['invoice_id'] = $row['invoice_id']; $result[$row['invoice_id']]['group'][] = $row; } var_export(array_values($result));
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => array ( 'invoice_id' => '72,', 'group' => array ( 0 => array ( 'invoice_id' => '72,', 'item' => 'SN00001', ), ), ), 1 => array ( 'invoice_id' => '73,', 'group' => array ( 0 => array ( 'invoice_id' => '73,', 'item' => 'SN00002', ), 1 => array ( 'invoice_id' => '73,', 'item' => 'SN00003', ), 2 => array ( 'invoice_id' => '73,', 'item' => 'SN00004', ), ), ), 2 => array ( 'invoice_id' => '74,', 'group' => array ( 0 => array ( 'invoice_id' => '74,', 'item' => 'SN00005', ), 1 => array ( 'invoice_id' => '74,', 'item' => 'SN00006', ), ), ), )

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