3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = '回';echo pack('a3',$str); echo $bin = pack("C3", ord($str{0}), ord($str{1}), ord($str{2}));//回 $hex = strtoupper(bin2hex($bin)); echo "UTF-8编码: " . $hex . "\n";
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Array and string offset access syntax with curly braces is no longer supported in /in/pA3qq on line 4
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Deprecated: Array and string offset access syntax with curly braces is deprecated in /in/pA3qq on line 4 Deprecated: Array and string offset access syntax with curly braces is deprecated in /in/pA3qq on line 4 Deprecated: Array and string offset access syntax with curly braces is deprecated in /in/pA3qq on line 4 回回UTF-8编码: E59B9E
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
回回UTF-8编码: E59B9E
preferences:
235.63 ms | 405 KiB | 342 Q