--TEST-- grapheme_substr() - Bug55562 - grapheme_substr() returns false if length parameter is to large --SKIPIF-- <?php if( !extension_loaded( 'intl' ) ) print 'skip'; ?> --FILE-- <?php var_dump( grapheme_substr('FOK', 1, 20), // expected: OK grapheme_substr('한국어', 1, 20) //expected: 국어 ); --EXPECT-- string(2) "OK" string(6) "국어"