[php-src] Issue #9762: In last update 7.4.30->7.4.32 strange bug in preg_replace

Issue: https://github.com/php/php-src/issues/9762 Author: partizanes ### Description The following code after update to 7.4.32 from 7.4.30: ```php <?php $file = DIR_APPLICATION . 'controller/' . $this->route . '.php'; $class = 'Controller' . preg_replace('/[^a-zA-Z0-9]/', '', $this->route); if (is_file($file)) { include_once(modification($file)); $controller = new $class($registry); ``` Resulted in this output: ``` I got error PHP Fatal error: Uncaught Error: Class 'Controllerstartup' not found in /user/public_html/system/storage/modification/system/engine/action.php:43 for debug i add this line file_put_contents('./log_test.log', $this->route.PHP_EOL, FILE_APPEND); file_put_contents('./log_test.log', $class.PHP_EOL, FILE_APPEND); and check output with show unprintable symbol: # tail -f ./log_test.log | cat -v startup/session Controllerstartup^@^@^@session As you can see, as a result of the replacement, non-printable characters appeared that lead to the above error. ``` But I expected this output instead: ``` When i downgrade to 7.4.30 i got startup/session Controllerstartupsession and all working. ``` I tried to check this behavior in a separate script by replacing $this->route with a string, but it was not possible to repeat this behavior there. Any help? ### PHP Version PHP 7.4.32 ### Operating System CloudLinux