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<?php $array = [ "GL001_M", "GL001_XS", "GL001_S", "GL001_L", "GL002_M", "GL002_XS", "GL002_S", "GL002_L" ]; foreach ($array as $v) { [$ids[], $sizes[]] = explode('_', $v, 2); } array_multisort( $ids, $sizes, SORT_DESC, $array ); var_export($array);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => 'GL001_XS', 1 => 'GL001_S', 2 => 'GL001_M', 3 => 'GL001_L', 4 => 'GL002_XS', 5 => 'GL002_S', 6 => 'GL002_M', 7 => 'GL002_L', )

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