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  1. <?php
  2.  
  3. $re = '/(<\?php.*?)\$lang\[([^]]*)]/'; 
  4. $str = "<?php echo \$lang['extension_not_allowed'] ?>"; 
  5. $subst = '$1\\$this->$lang($2)';
  6. $result = preg_replace($re, $subst, $str);
  7. print_r($result);
Success #stdin #stdout 0.03s 52480KB
comments (?)
stdin 
Standard input is empty
stdout 
<?php echo $this->$lang('extension_not_allowed') ?>
https://ideone.com/Sm23Wg
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
secret

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