<?php $array = [ [ ["2011-11-18 00:00:00" => 'C'], ["2011-11-18 00:00:00" => 'I'], ["2011-11-18 00:00:00" => 'S'], ], [ ["2011-11-22 00:00:00" => 'C'], ["2011-11-22 00:00:00" => 'S'] ] ]; var_export( array_merge( ...array_map( fn($set) => [key($set[0]) => count($set, COUNT_RECURSIVE) - count($set)], $array ) ) );
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