Online PHP editor | refs for acOTR

<?php $string = '👶🏻'; echo '=== UTF-8 =============================', PHP_EOL; echo 'STRING: ', $string, PHP_EOL; echo 'CHARACTERS: ', mb_strlen($string), PHP_EOL; // 2 echo 'BYTE COUNT: ', strlen($string), PHP_EOL; // 8 foreach(range(0, mb_strlen($string) - 1) as $index) { echo PHP_EOL; echo 'CHARACTER #', $index + 1, ' CODE POINT: ', '0x', dechex(mb_ord(mb_substr($string, $index, 1))), PHP_EOL; // [0x1f476, 0x1f3fb] echo 'CHARACTER #', $index + 1, ' BYTE COUNT: ', mb_strlen(mb_substr($string, $index, 1), '8bit'), PHP_EOL; // [4, 4] } echo '=======================================', PHP_EOL, PHP_EOL; $string = mb_convert_encoding($string, 'UTF-16', 'UTF-8'); echo '=== UTF-16 ============================', PHP_EOL; echo 'STRING: ', $string, PHP_EOL; echo 'CHARACTERS: ', mb_strlen($string), PHP_EOL; // should be 2, is 4 echo 'BYTE COUNT: ', strlen($string), PHP_EOL; // should be 8, is 8 foreach(range(0, mb_strlen($string) - 1) as $index) { echo PHP_EOL; echo 'CHARACTER #', $index + 1, ' CODE POINT: ', '0x', dechex(mb_ord(mb_substr($string, $index, 1))), PHP_EOL; // should be [0x1f476, 0x1f3fb], is [0x0, 0x0, 0x0, 0x0] echo 'CHARACTER #', $index + 1, ' BYTE COUNT: ', mb_strlen(mb_substr($string, $index, 1), '8bit'), PHP_EOL; // should be [4, 4], is [2, 2, 2, 2] } echo '=======================================', PHP_EOL;