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  1. <?php
  2.  
  3. function foobar($match) {
  4.     if (strtolower($match[1][0]) === 'x') {
  5.         $codepoint = hexdec(ltrim(substr($match[1], 1), '0'));
  6.     } else {
  7.         $codepoint = (int)ltrim($match[1], '0');
  8.     }
  9. echo $codepoint;
  10.     return mb_convert_encoding(pack('N', $codepoint), 'UTF-8', 'UTF-16BE');
  11. }
  12. $str = '&#151;';
  13. echo $str;
  14. var_dump( preg_replace_callback('/&#(x[0-9a-f]+|[0-9]+);/i', 'foobar', $str) );
Success #stdin #stdout 0.02s 13112KB
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&#151;151string(3) "—"
https://ideone.com/WK1Us
language:
PHP (php 7.3.5)
created:
14 years ago
visibility:
public

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