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<?php $array = [ '215/75R17.5', '235/75R17.5', '8.25R16', '7.00R16', '11R22.5', '7.50R16' ]; array_multisort(array_map(fn($v) => strpbrk($v, 'R'), $array), SORT_NATURAL, $array); var_export($array);
Output for 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
array ( 0 => '7.00R16', 1 => '7.50R16', 2 => '8.25R16', 3 => '215/75R17.5', 4 => '235/75R17.5', 5 => '11R22.5', )
preferences:
102.11 ms | 407 KiB | 5 Q