Reference - Parms functions - bin2hex

[{echo 0xABC | php:bin2hex}][{echo 0x4142}]

<?php

  // A text with a byte that is no UTF-8, far before its end: it is cut in code points, as
  // the same text is when the byte stands near the end.

  $tail  = "ab\u{1F1F3}\u{1F1F1}e\u{301}";
  $long  = "\xFF" . str_repeat ( 'a', 5000 ) . $tail;
  $short = "\xFF" . str_repeat ( 'a', 10 ) . $tail;

?>

[{echo $long | right(1) | php:bin2hex(@)}][{echo $long | right(2) | php:bin2hex(@)}][{echo $long | substr(-3, 1) | php:bin2hex(@)}][{echo $short | right(1) | php:bin2hex(@)}]

<?php

  $flag = "\u{1F1F3}\u{1F1F1} NL";
  $nfd  = "e\u{0301}cole";
  $fam  = "a\u{1F468}\u{200D}\u{1F469}\u{200D}\u{1F467}";

?>

[{echo $flag | left(1) | php:bin2hex(@)}][{echo $nfd | left(1) | php:bin2hex(@)}][{echo $fam | right(1) | php:bin2hex(@)}][{echo $nfd | mid(2, 2)}][{echo $flag | max_len(1) | php:bin2hex(@)}][{echo $nfd | substr(1)}][{echo $nfd | truncate(3, '.') | php:bin2hex(@)}]

<?php

  // Past 4096 bytes right() and substr() from the end read a window at the end of the text,
  // not the whole of it: a run of flags, whose pairs count from the run's start, and an
  // accent written apart must come out whole there too.

  $flags  = str_repeat ( "\u{1F1F3}\u{1F1F1}", 3001 );
  $accent = str_repeat ( "e\u{0301}", 3000 ) . "ab";

?>

[{echo $flags | right(1) | php:bin2hex(@)}][{echo $flags | substr(-2, 1) | php:bin2hex(@)}][{echo $accent | right(3) | php:bin2hex(@)}][{echo $accent | mid(3000, 1) | php:bin2hex(@)}][{echo $accent | truncate(3, '') | php:bin2hex(@)}]