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<?php $str = "L’autentica Basilicata Igt Bianco Dolce 2007"; $str = preg_replace_callback("/['`’][aeiou]/u", function ($m) { return strtoupper($m[1]); }, $str); var_dump($str);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key 1 in /in/rEGaI on line 3 Deprecated: strtoupper(): Passing null to parameter #1 ($string) of type string is deprecated in /in/rEGaI on line 3 string(42) "Lutentica Basilicata Igt Bianco Dolce 2007"

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