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  1. <?php
  2.  
  3. $code = '<?php
  4.  
  5. $cat = "foo";
  6. $cat2 = "bar";
  7. $dog = "baz";
  8.  
  9. ';
  10.  
  11. $replace = array(
  12.     'cat' => 'dog',
  13.     'cat2' => 'not_dog',
  14.     'dog' => 'cat',
  15. );
  16.  
  17. $tokens = token_get_all($code);
  18.  
  19. $newCode = '';
  20.  
  21. foreach ($tokens as $token) {
  22.     if (is_array($token)) {
  23.         if ($token[0] == T_VARIABLE) {
  24.             $variableName = substr($token[1], 1);
  25.             if (array_key_exists($variableName, $replace)) {
  26.                 $token[1] = sprintf('$%s', $replace[$variableName]);
  27.             }
  28.         }
  29.  
  30.         $part = $token[1];
  31.     } else {
  32.         $part = $token;
  33.     }
  34.  
  35.     $newCode .= $part;
  36. }
  37.  
  38. echo $newCode;
Success #stdin #stdout 0.01s 20520KB
comments (?)
stdin 
Standard input is empty
stdout 
<?php

$dog = "foo";
$not_dog = "bar";
$cat = "baz";
https://ideone.com/WUlRdo
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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