How to convert a huge integer to hex in php?

Question

How can I convert this: ``` 9312660682897061594767289296453011313180604726492752614962349778735928598708212386406555876878916185094145420038141655929349984786756296776268556142401047 ``` in base 16 ? I found this recursive function: ``` function bcdechex($dec) { $last = bcmod($dec, 16); $remain = bcdiv(bcsub($dec, $last), 16); if($remain == 0) { return dechex($last); } else { return bcdechex($remain).dechex($last); } } ``` but the nesting level of 100 is reached, even if I have xdebug.max_nesting_level = 1000 in my php.ini config file. My xdebug configuration looks like this: ``` ;Xdebug zend_extension = "${path}\php\php546x121216181946\php_xdebug-2.2.1-5.4-vc9.dll" xdebug.default_enable=1 xdebug.remote_enable=1 xdebug.remote_host=127.0.0.1 xdebug.remote_port=9000 xdebug.remote_handler=dbgp xdebug.remote_mode=req xdebug.remote_autostart = false xdebug.dump_globals=1 xdebug.dump=COOKIE,FILES,GET,POST,REQUEST,SERVER,SESSION xdebug.dump.SERVER=REMOTE_ADDR,REQUEST_METHOD,REQUEST_URI xdebu…

Accepted Answer

It's pretty easy to modify the function you found to be iterative rather than recursive:

```
function bcdechex($dec) {
    $hex = '';
    do {    
        $last = bcmod($dec, 16);
        $hex = dechex($last).$hex;
        $dec = bcdiv(bcsub($dec, $last), 16);
    } while($dec>0);
    return $hex;
}
```

Your example `$bignum` converted to hex is: `b1cf5653e79bef001acfb0f99d1f34487d16a8253e3a9971e98d46382114e8ac81b5102ab3c56be1f77d0eb754f566c0dacb23d64755e823f35411f9e14c5617`

How to convert a huge integer to hex in php?

Solution

Problem

Related problems