php-phpbb/phpBB/includes/utf/data/case_fold_s.php

<?php return array('ᾈ'=>'ᾀ','ᾉ'=>'ᾁ','ᾊ'=>'ᾂ','ᾋ'=>'ᾃ','ᾌ'=>'ᾄ','ᾍ'=>'ᾅ','ᾎ'=>'ᾆ','ᾏ'=>'ᾇ','ᾘ'=>'ᾐ','ᾙ'=>'ᾑ','ᾚ'=>'ᾒ','ᾛ'=>'ᾓ','ᾜ'=>'ᾔ','ᾝ'=>'ᾕ','ᾞ'=>'ᾖ','ᾟ'=>'ᾗ','ᾨ'=>'ᾠ','ᾩ'=>'ᾡ','ᾪ'=>'ᾢ','ᾫ'=>'ᾣ','ᾬ'=>'ᾤ','ᾭ'=>'ᾥ','ᾮ'=>'ᾦ','ᾯ'=>'ᾧ','ᾼ'=>'ᾳ','ῌ'=>'ῃ','ῼ'=>'ῳ');