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<?php $haystack = array( 'Part1', 'Part2', 'Part3', 'Part4' ); $matches = preg_grep('/(?!Part)\d/', $haystack); print_r($matches);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.5 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Array ( [0] => Part1 [1] => Part2 [2] => Part3 [3] => Part4 )

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149.46 ms | 403 KiB | 198 Q