Online PHP editor | output for 5VXFC

@ 2020-01-15T17:27:50Z

<?php

$string = '#️⃣';

echo '=== UTF-8 =============================', PHP_EOL;
echo 'STRING: ', $string, PHP_EOL;
echo 'CHARACTERS: ', mb_strlen($string), PHP_EOL; // 3
echo 'BYTE COUNT: ', strlen($string),  PHP_EOL; // 7

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; // [0x23, 0xfe0f, 0x20e3]
    echo 'CHARACTER #', $index + 1, ' BYTE COUNT: ', mb_strlen(mb_substr($string, $index, 1), '8bit'), PHP_EOL; // [1, 3, 3]
}
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 3, is 6
echo 'BYTE COUNT: ', strlen($string),  PHP_EOL; // should 6, is 6

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 [0x23, 0xfe0f, 0x20e3], is [0x0, 0x23, 0x0, 0xf, 0x20, 0x0]; it actually gets kinda close here, if you recompose two by two bytes, but no cigar
    echo 'CHARACTER #', $index + 1, ' BYTE COUNT: ', mb_strlen(mb_substr($string, $index, 1), '8bit'), PHP_EOL; // should be [2, 2, 2], is [1, 1, 1, 1, 1, 1]
}
echo '=======================================', PHP_EOL;

Output for 8.3.2 - 8.3.26, 8.4.1 - 8.4.14: === UTF-8 ============================= STRING: #️⃣ CHARACTERS: 3 BYTE COUNT: 7 CHARACTER #1 CODE POINT: 0x23 CHARACTER #1 BYTE COUNT: 1 CHARACTER #2 CODE POINT: 0xfe0f CHARACTER #2 BYTE COUNT: 3 CHARACTER #3 CODE POINT: 0x20e3 CHARACTER #3 BYTE COUNT: 3 ======================================= === UTF-16 ============================ STRING: #� � CHARACTERS: 6 BYTE COUNT: 6 CHARACTER #1 CODE POINT: 0x0 CHARACTER #1 BYTE COUNT: 1 CHARACTER #2 CODE POINT: 0x23 CHARACTER #2 BYTE COUNT: 1 CHARACTER #3 CODE POINT: 0x3f CHARACTER #3 BYTE COUNT: 1 CHARACTER #4 CODE POINT: 0xf CHARACTER #4 BYTE COUNT: 1 CHARACTER #5 CODE POINT: 0x20 CHARACTER #5 BYTE COUNT: 1 CHARACTER #6 CODE POINT: 0x3f CHARACTER #6 BYTE COUNT: 1 =======================================
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.1: === UTF-8 ============================= STRING: #️⃣ CHARACTERS: 3 BYTE COUNT: 7 CHARACTER #1 CODE POINT: 0x23 CHARACTER #1 BYTE COUNT: 1 CHARACTER #2 CODE POINT: 0xfe0f CHARACTER #2 BYTE COUNT: 3 CHARACTER #3 CODE POINT: 0x20e3 CHARACTER #3 BYTE COUNT: 3 ======================================= === UTF-16 ============================ STRING: #� � CHARACTERS: 6 BYTE COUNT: 6 CHARACTER #1 CODE POINT: 0x0 CHARACTER #1 BYTE COUNT: 1 CHARACTER #2 CODE POINT: 0x23 CHARACTER #2 BYTE COUNT: 1 CHARACTER #3 CODE POINT: 0x0 CHARACTER #3 BYTE COUNT: 1 CHARACTER #4 CODE POINT: 0xf CHARACTER #4 BYTE COUNT: 1 CHARACTER #5 CODE POINT: 0x20 CHARACTER #5 BYTE COUNT: 1 CHARACTER #6 CODE POINT: 0x0 CHARACTER #6 BYTE COUNT: 1 =======================================

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