Re: is_numeric for php3

You can use sprintf() to determine if a number is numeric or not. /* Return TRUE if numeric and FALSE if not. */ function is_numeric_php3($var) { if( !isset($var) ) return FALSE; if( $var==0 ) return TRUE; if( sprintf("%f", $var) ) return TRUE; else return FALSE: } This code seems to work and runs faster then a regex. On Tuesday 28 August 2001 18:42, daniel james wrote: > Ahhh, in that context, with is_integer(), i think > you're partially right. however, i looked it up, and > is_numeric() will work fine. > > http://www.php.net/manual/en/function.is-numeric.php > > btw-- as for the regexps, none for me, thanks ;) > those things give me the heebie-jeebies. > > --- "scott [gts]" <scott@graphictype.com> wrote: > > i think he's asking for a numeric test, not an > > integer test. > > > > your example looks like it should fail "3.50" (for > > example), > > even though "3.50" is a perfectly valid numeric > > value. > > > > personally, i think you should just use regexps. ;-) > > > > i tried to write a little is_num() type function, > > but i kept > > getting caught on split(); it seems that split() > > converts > > everything to string, no matter what. so if you try > > to split > > on the decimal point of 45.67 ... you get two > > strings, "45" and "67" > > not 45 and 67, so subsequent is_integer() calls fail > > > > (since is_integer() checks the *type* of the > > variable, > > not the *value* -- very important to keep in mind) > > > > here's what i came up with... perhaps it will be of > > some > > help to you (even though it doesnt work) > > > > > > function is_num($number) { > > > > // $x contains number, $y contains any decimal > > value > > list ($x, $y) = split("\.", $number); > > > > // if there's no decimal value > > if ( empty($y) ) { > > return is_int($x); > > } > > else { > > return ( is_int($x) && is_int($y) ); > > } > > > > } > > > > > -----Original Message----- > > > From: daniel james [mailto:cgi_guy1313@yahoo.com] > > > Subject: Re: [PHP] is_numeric for php3 > > > > > > do you mean, as in, > > > > > > if !is_integer($var) { > > > print("$var is not an integer"); > > > } > > > > -- > > PHP General Mailing List (http://www.php.net/) > > To unsubscribe, e-mail: > > php-general-unsubscribe@lists.php.net > > For additional commands, e-mail: > > php-general-help@lists.php.net > > To contact the list administrators, e-mail: > > php-list-admin@lists.php.net > > __________________________________________________ > Do You Yahoo!? > Make international calls for as low as $.04/minute with Yahoo! Messenger > http://phonecard.yahoo.com/