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  1. <?php
  2. function uniord($ch)
  3. {
  4.  
  5.     $n = ord($ch{0});
  6.  
  7.     if ($n < 128) {
  8.         return $n; // no conversion required 
  9.     }
  10.  
  11.     if ($n < 192 || $n > 253) {
  12.         return false; // bad first byte || out of range 
  13.     }
  14.  
  15.     $arr = array(
  16.         1 => 192, // byte position => range from 
  17.         2 => 224,
  18.         3 => 240,
  19.         4 => 248,
  20.         5 => 252
  21.     );
  22.  
  23.     foreach ($arr as $key => $val) {
  24.         if ($n >= $val) { // add byte to the 'char' array 
  25.             $char[] = ord($ch{$key}) - 128;
  26.             $range  = $val;
  27.         } else {
  28.             break; // save some e-trees 
  29.         }
  30.     }
  31.  
  32.     $retval = ($n - $range) * pow(64, sizeof($char));
  33.  
  34.     foreach ($char as $key => $val) {
  35.         $pow = sizeof($char) - ($key + 1); // invert key 
  36.         $retval += $val * pow(64, $pow); // dark magic 
  37.     }
  38.  
  39.     return $retval;
  40. }
  41. $decimal = '&#' . uniord(json_decode('"\ud83d\ude05"')) . ';';
  42. echo $decimal;
  43. ?>
Success #stdin #stdout 0.01s 82880KB
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&#128517;
https://ideone.com/UYUD9i
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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