Online PHP editor | refs for jR9vD

<?php // https://en.wikipedia.org/wiki/Dotted_and_dotless_I //var_dump(mb_strtolower('I')); // should be "ı" //var_dump(mb_strtolower('İ')); // should be "i" $coll1 = collator_create( 'de' ); var_dump(collator_compare($coll1,'I','İ')); $coll2 = collator_create( 'de' ); var_dump(collator_compare($coll2,'ß','ss')); $coll3 = collator_create( 'de' ); var_dump(collator_compare($coll3,mb_strtolower('ß'),mb_strtolower('SS')));