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<?php $array = [ '500 - 1112', ' 1113 - 2224', '2225 - 4446 ', '4446' ]; var_export( array_reduce( $array, function ($result, $v) { if (sscanf($v, '%d - %d', $ints[], $ints[]) === 2) { $result[0] ??= []; array_push($result[0], ...$ints); } else { $result[1] = $ints[0]; } return $result; }, [] ) );
Output for 8.1.32, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1
array ( 0 => array ( 0 => 500, 1 => 1112, 2 => 1113, 3 => 2224, 4 => 2225, 5 => 4446, ), 1 => 4446, )
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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