#47901 [NEW]: Need to define "large numbers" in base_convert limitations

From: exploringbinary at gmail dot com Operating system: Windows PHP version: Irrelevant PHP Bug Type: Documentation problem Bug description: Need to define "large numbers" in base_convert limitations Description: ------------ The documentation for base_convert says "base_convert() may lose precision on large numbers...". Can you define exactly what "large number" is? Without knowing the limit, it's hard to trust the results. I know you can't specify a single limit, because it could vary by implementation. It still would be useful to define a limit for the most common implementations, like 32 bit unsigned integers or IEEE double floating-point. In the case of IEEE double floating-point, my guess is that the limit is 2^53, meaning that all integers less than or equal to 2^53 will be converted correctly. (All integers from 0 to 2^53 can fit in an IEEE double.) Related bug reports: Bug #23564 base_convert() ignores last character Bug #35874 base_convert is off on numbers greater than 13 decimal places -- Edit bug report at http://bugs.php.net/?id=47901&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=47901&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=47901&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=47901&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=47901&r=fixedcvs Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=47901&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=47901&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=47901&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=47901&r=needscript Try newer version: http://bugs.php.net/fix.php?id=47901&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=47901&r=support Expected behavior: http://bugs.php.net/fix.php?id=47901&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=47901&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=47901&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=47901&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=47901&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=47901&r=dst IIS Stability: http://bugs.php.net/fix.php?id=47901&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=47901&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=47901&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=47901&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=47901&r=mysqlcfg