Online PHP editor | refs for 2PPl6

<?php $data = [ ['model_num' => 'ABC', 'revision' => 'AA', 'testRecipeID' => 85, 'value' => 31.25, 'treatment' => 'Pressure'], ['model_num' => 'ABC', 'revision' => 'AA', 'testRecipeID' => 85, 'value' => 31.25, 'treatment' => 'Gas'], ['model_num' => 'ABC', 'revision' => 'AA', 'testRecipeID' => 85, 'value' => 33.12, 'treatment' => 'Temp'], ['model_num' => 'ABC', 'revision' => 'AA', 'testRecipeID' => 85, 'value' => 25.87, 'treatment' => 'Current'], ['model_num' => 'ABC', 'revision' => 'AB', 'testRecipeID' => 86, 'value' => 26.63, 'treatment' => 'Pressure'], ['model_num' => 'ABC', 'revision' => 'AB', 'testRecipeID' => 86, 'value' => 26.0, 'treatment' => 'Gas'], ['model_num' => 'ABC', 'revision' => 'AB', 'testRecipeID' => 86, 'value' => 23.75, 'treatment' => 'Temp'] ]; $result = []; foreach ($data as $row) { $compositeKey = "{$row['model_num']}-{$row['revision']}-{$row['testRecipeID']}"; $result[$compositeKey] ??= [ 'model_num' => $row['model_num'], 'revision' => $row['revision'], 'testRecipeID' => $row['testRecipeID'] ]; $result[$compositeKey][$row['treatment']] = $row['value']; } var_export(array_values($result));