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<?php $foo = ["a", "B", "æ", "Æ", "c", "A", "b", "C", "1"]; usort($foo, function($a, $b) { return [mb_strtoupper($a), $a] <=> [mb_strtoupper($b), $b]; }); var_export($foo);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => '1', 1 => 'A', 2 => 'a', 3 => 'B', 4 => 'b', 5 => 'C', 6 => 'c', 7 => 'Æ', 8 => 'æ', )

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