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<?php for ($i = 0; $i < 0x10ffff; $i++) { $chr = mb_chr($i); if (strlen($chr) !== strlen(mb_strtolower($chr)) || strlen($chr) !== strlen(mb_strtoupper($chr))) { var_dump($i); var_dump($chr); var_dump(mb_strtolower($chr)); var_dump(mb_strtoupper($chr)); break; } }
Output for git.master, git.master_jit, rfc.property-hooks
int(304) string(2) "İ" string(3) "i̇" string(2) "İ"

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