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run code in 200+ php & hhvm versions
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<?php echo mb_strtoupper("ı ğ Ğ"); echo "\n"; echo strtoupper("ı ğ Ğ"); ?>
Output for 5.6.7 - 7.2.0
I Ğ Ğ ı ğ Ğ
Output for 4.3.0 - 5.5.35
ı ğ Ğ ı ğ Ğ