Issue: https://github.com/php/php-src/issues/11761
Author: jorgsowa
### Description
The following code results in Out of memory error.
https://3v4l.org/vHJkg#v8.2.7
```php
<?php
var_dump(bcpow("0.000000000000000000000000000",737332323));
```
Resulted in this output:
```
Fatal error: Out of memory (allocated 28266496 bytes) (tried to allocate 7077891 bytes) in /in/vHJkg
on line 3
```
But I expected this output instead:
```
string(1) "0"
```
PR fixing this issue: https://github.com/php/php-src/pull/11641
### PHP Version
PHP 8.2
### Operating System
_No response_