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  1. <?php
  2.  
  3. function escape_as_double_quoted_literal_matcher ($m) {
  4. 	$ch = $m[0];
  5. 	switch ($ch) {
  6. 		case "\n": return '\n';
  7. 		case "\r": return '\r';
  8. 		case "\t": return '\t';
  9. 		case "\v": return '\v';
  10. 		case "\e": return '\e';
  11. 		case "\f": return '\f';
  12. 		case "\\": return '\\\\';
  13. 		case "\$": return '\\$';
  14. 		case "\"": return '\\"';
  15. 		case "\0": return '\0';
  16. 		default:
  17. 			$h = dechex(ord($ch));
  18. 			return '\x' . (strlen($h) > 1 ? $h : '0' . $h);
  19. 	}
  20. }
  21.  
  22. function escape_as_double_quoted_literal ($val) {
  23. 	return preg_replace_callback(
  24.             "|[^\x20-\x21\x23\x25-\x5b\x5e-\x7e]|",
  25.             "escape_as_double_quoted_literal_matcher",
  26.             $val);
  27. }
  28.  
  29. $text = "\0\1\xff\"hello\\world\"\n\$";
  30. echo escape_as_double_quoted_literal($text);
Success #stdin #stdout 0.01s 20520KB
comments (?)
stdin 
Standard input is empty
stdout 
\0\x01\xff\"hello\\world\"\n\$
https://ideone.com/li8RvV
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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