如何转换它:
9312660682897061594767289296453011313180604726492752614962349778735928598708212386406555876878916185094145420038141655929349984786756296776268556142401047
在基地 16 ?
我发现了这个递归函数:
function bcdechex($dec) {
$last = bcmod($dec, 16);
$remain = bcdiv(bcsub($dec, $last), 16);
if($remain == 0) {
return dechex($last);
} else {
return bcdechex($remain).dechex($last);
}
}
但是达到了 100 的嵌套级别,即使我的 php.ini 配置文件中有 xdebug.max_nesting_level = 1000。
我的 xdebug 配置如下所示:
;Xdebug
zend_extension = "${path}phpphp546x121216181946php_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
xdebug.show_local_vars=1
xdebug.show_mem_delta=1
xdebug.collect_includes=1
xdebug.collect_vars=1
xdebug.collect_params=4
xdebug.collect_return=1
xdebug.auto_trace=0
xdebug.trace_options=0
xdebug.trace_format=0
xdebug.trace_output_dir="${path}xdebugtrace"
xdebug.trace_output_name="trace.%t"
xdebug.profiler_enable=0
xdebug.profiler_append=1
xdebug.profiler_enable_trigger=1
xdebug.profiler_output_dir="${path}xdebugprofiler"
xdebug.profiler_output_name="cachegrind.out.%s.%t"
xdebug.max_nesting_level = 1000
;/Xdebug
是否有与此不同的功能或有关如何转换此整数的任何提示?
谢谢你!
修改你发现的迭代函数而不是递归函数非常容易:
function bcdechex($dec) {
$hex = '';
do {
$last = bcmod($dec, 16);
$hex = dechex($last).$hex;
$dec = bcdiv(bcsub($dec, $last), 16);
} while($dec>0);
return $hex;
}
转换为十六进制$bignum
示例为: b1cf5653e79bef001acfb0f99d1f34487d16a8253e3a9971e98d46382114e8ac81b5102ab3c56be1f77d0eb754f566c0dacb23d64755e823f35411f9e14c5617
第一个答案非常好(这使我们能够比较结果),但我无法安装 BCMath。所以,我找到了这个功能:
function my_base_convert($numstring, $frombase, $tobase)
{
$chars = "0123456789abcdefghijklmnopqrstuvwxyz";
$tostring = substr($chars, 0, $tobase);
$length = strlen($numstring);
$result = '';
for ($i = 0; $i < $length; $i++)
{
$number[$i] = strpos($chars, $numstring{$i});
}
do
{
$divide = 0;
$newlen = 0;
for ($i = 0; $i < $length; $i++)
{
$divide = $divide * $frombase + $number[$i];
if ($divide >= $tobase)
{
$number[$newlen++] = (int)($divide / $tobase);
$divide = $divide % $tobase;
} elseif ($newlen > 0)
{
$number[$newlen++] = 0;
}
}
$length = $newlen;
$result = $tostring{$divide} . $result;
} while ($newlen != 0);
return $result;
}
echo my_base_convert($bignum, 10, 16);
转换为十六进制的示例$bignum与第一个答案相同:b1cf5653e79bef001acfb0f99d1f34487d16a8253e3a9971e98d46382114e8ac81b5102ab3c56be1f77d0eb754f566c0dacb23d64755e823f35411f9e14c5617
这里找到的函数 https://magp.ie/2015/09/30/convert-large-integer-to-hexadecimal-without-php-math-extension/(但示例中有一个小错误:"16, 10"而不是"10, 16")