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<?php $array = [ ["2" => 6, "5" => 1], ["2" => 1, "5" => 3], ]; var_export( array_reduce( $array, fn($result, $row) => array_reduce( array_keys($row), fn($res, $k) => isset($res[$k]) && $res[$k] >= $row[$k] ? $res : array_replace($res, [$k => $row[$k]]), $result ), [] ) );
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.30, 8.3.0 - 8.3.29, 8.4.1 - 8.4.14, 8.4.16, 8.5.0 - 8.5.1
array ( 2 => 6, 5 => 3, )
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
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106.39 ms | 407 KiB | 5 Q