Online PHP editor | output for PF1RC

<?php $array = [ [ '0-300' => 2.5, '300-500' => 2.5, '500-1000' => 2.5, '1000-5000' => 2.4, '>5000' => 2.4 ], [ '0-300' => 1.2, '300-500' => 1.2, '500-1000' => 1.2, '1000-5000' => 1.3, '>5000' => 1.4 ], [ '0-300' => 2.5, '300-500' => 2.5, '500-1000' => 2.5, '1000-5000' => 2.5, '>5000' => 2.5 ], [ '0-300' => 4.5, '300-500' => 2.5, '500-1000' => 2.5, '1000-5000' => 2.5, '>5000' => 3.5 ], [ '0-300' => 4.5, '300-500' => 3.5, '500-1000' => 3.5, '1000-5000' => 3.5, '>5000' => 3.5 ], [ '0-300' => 1.5, '300-500' => 2.5, '500-1000' => 2.5, '1000-5000' => 2.5, '>5000' => 1.5 ], [ '0-300' => 1.5, '300-500' => 2.5, '500-1000' => 3.5, '1000-5000' => 2.5, '>5000' => 3.5 ], [ '0-300' => 1.5, '300-500' => 2.5, '500-1000' => 2.5, '1000-5000' => 1.5, '>5000' => 1.5 ] ]; $result = []; foreach ($array as $row) { $merged = []; $entry = ['lb' => null, 'ub' => null, 'value' => null]; foreach ($row as $range => $value) { sscanf(ltrim("$range-INF", '>'), '%[^-]-%[^-]', $lowerBound, $upperBound); if ($value !== $entry['value']) { $entry['ub'] = $lowerBound; if ($entry['lb'] !== null) { $merged[] = $entry; } $entry['lb'] = $lowerBound; $entry['value'] = $value; } } $entry['ub'] = $upperBound; $merged[] = $entry; echo json_encode($merged) . "\n\n"; }