Re: Numerical string comparison - octal and hex.

2010/1/13 Rasmus Lerdorf <rasmus@lerdorf.com>: > Richard Quadling wrote: >> Hello. >> >> In looking at numer vs string comparison, I think I've found an oddity. >> >> You can successfully compare hex strings ... >> >> var_dump(255 == '0xff'); >> >> but not octal strings ... >> >> var_dump(63 == '077'); >> >> >> Is this a bug (lack of octal support) or an unexpected feature (hex support)? > > We don't have octal strings in PHP.  Only native octal. > eg. > var_dump(63 == 077); > > Why?  Mostly because octal strings is more likely to cause incorrect > behaviour than both regular numeric strings and hex strings. > > -Rasmus > Thank you. Should [1] be updated to include hex strings and a note about octal strings? Richard. [1] http://docs.php.net/manual/en/language.types.string.php#language.types.string.conversion -- ----- Richard Quadling "Standing on the shoulders of some very clever giants!" EE : http://www.experts-exchange.com/M_248814.html Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731 ZOPA : http://uk.zopa.com/member/RQuadling