RE: [PHP] string vs number
On 05 February 2008 21:37, Jochem Maas advised: the same is not exactly true for floats - although you can use them as array keys you'll notice in the output of code below that they are stripped of their decimal part (essentially a floor() seems to be performed on the float value. I have no idea whether this is intentional, and whether you can therefore rely on this behaviour: Yes, and Yes! From http://php.net/language.types.array: A key may be either an integer or a string. If a key is the standard representation of an integer, it will be interpreted as such (i.e. 8 will be interpreted as 8, while 08 will be interpreted as 08). Floats in key are truncated to integer. -- Mike Ford, Electronic Information Services Adviser, JG125, The Headingley Library, James Graham Building, Leeds Metropolitan University, Headingley Campus, LEEDS, LS6 3QS, United Kingdom Email: [EMAIL PROTECTED] Tel: +44 113 812 4730 Fax: +44 113 812 3211 To view the terms under which this email is distributed, please go to http://disclaimer.leedsmet.ac.uk/email.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] string vs number
Ford, Mike schreef: On 05 February 2008 21:37, Jochem Maas advised: the same is not exactly true for floats - although you can use them as array keys you'll notice in the output of code below that they are stripped of their decimal part (essentially a floor() seems to be performed on the float value. I have no idea whether this is intentional, and whether you can therefore rely on this behaviour: Yes, and Yes! From http://php.net/language.types.array ah yes, I should have looked it up, that said I find it rather odd that is works let alone that it's intentional. though thinking about it you could probably use it for some float val distribution counting or something. I dunno, seems like it offers a handy shortcut - although what that shortcut is escapes me just now :-) A key may be either an integer or a string. If a key is the standard representation of an integer, it will be interpreted as such (i.e. 8 will be interpreted as 8, while 08 will be interpreted as 08). Floats in key are truncated to integer. -- Mike Ford, Electronic Information Services Adviser, JG125, The Headingley Library, James Graham Building, Leeds Metropolitan University, Headingley Campus, LEEDS, LS6 3QS, United Kingdom Email: [EMAIL PROTECTED] Tel: +44 113 812 4730 Fax: +44 113 812 3211 To view the terms under which this email is distributed, please go to http://disclaimer.leedsmet.ac.uk/email.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] string vs number
On Feb 5, 2008 1:36 PM, Hiep Nguyen [EMAIL PROTECTED] wrote:
hi all,
i have this php statement:
? if($rowB[$rowA[0]]=='Y') {echo checked;} ?
debugging, i got $rowA[0] = 54, but i want $rowB[$rowA[0]] = $rowB['54'].
is this possible? how do i force $rowA[0] to be a string
('54')?http://www.php.net/unsub.php
php should handle the conversion internally for you.
if you want to type cast a value to a string, simply do
(string)$varname
-nathan
Re: [PHP] string vs number
On Feb 5, 2008 1:40 PM, Nathan Nobbe [EMAIL PROTECTED] wrote:
On Feb 5, 2008 1:36 PM, Hiep Nguyen [EMAIL PROTECTED] wrote:
hi all,
i have this php statement:
? if($rowB[$rowA[0]]=='Y') {echo checked;} ?
debugging, i got $rowA[0] = 54, but i want $rowB[$rowA[0]] = $rowB['54'].
is this possible? how do i force $rowA[0] to be a string
('54')?http://www.php.net/unsub.php
php should handle the conversion internally for you.
if you want to type cast a value to a string, simply do
(string)$varname
-nathan
I was thinking about saying that, but php is loosely typed, so 54 ==
'54'. I'm thinking something else is wrong here.
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] string vs number
On Feb 5, 2008 1:43 PM, Eric Butera [EMAIL PROTECTED] wrote: I was thinking about saying that, but php is loosely typed, so 54 == '54'. i only mentioned the type cast because it was asked about; actually, there are rare times in php when type casts are called for, such as pulling a value from a SimpleXMLElement. but that is neither here nor there.. I'm thinking something else is wrong here. ya, like $rowB['54'] != 'Y'; // ;) -nathan
Re: [PHP] string vs number
On Feb 5, 2008, at 10:43 AM, Eric Butera [EMAIL PROTECTED]
wrote:
On Feb 5, 2008 1:40 PM, Nathan Nobbe [EMAIL PROTECTED] wrote:
On Feb 5, 2008 1:36 PM, Hiep Nguyen [EMAIL PROTECTED] wrote:
hi all,
i have this php statement:
? if($rowB[$rowA[0]]=='Y') {echo checked;} ?
debugging, i got $rowA[0] = 54, but i want $rowB[$rowA[0]] = $rowB
['54'].
is this possible? how do i force $rowA[0] to be a string ('54')?http://www.php.net/unsub.php
php should handle the conversion internally for you.
if you want to type cast a value to a string, simply do
(string)$varname
-nathan
I was thinking about saying that, but php is loosely typed, so 54 ==
'54'. I'm thinking something else is wrong here.
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
I believe this is the difference with arrays:
$a = array(2 = foo);
Array(0 = null, 1 = null, 2 = foo)
$a = array(2 = foo);
Array(2 = foo)
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] string vs number
On Feb 5, 2008 1:50 PM, Casey [EMAIL PROTECTED] wrote: I believe this is the difference with arrays: $a = array(2 = foo); Array(0 = null, 1 = null, 2 = foo) $a = array(2 = foo); Array(2 = foo) i think the implicit type casting applies there as well: php $meh = array(2=4); php echo $meh['2']; 4 php $meh['2'] = 5; php echo $meh['2']; 5 php echo $meh[2]; 5 -nathan
Re: [PHP] string vs number
On Feb 5, 2008 1:48 PM, Nathan Nobbe [EMAIL PROTECTED] wrote: On Feb 5, 2008 1:43 PM, Eric Butera [EMAIL PROTECTED] wrote: I was thinking about saying that, but php is loosely typed, so 54 == '54'. i only mentioned the type cast because it was asked about; actually, there are rare times in php when type casts are called for, such as pulling a value from a SimpleXMLElement. but that is neither here nor there.. I'm thinking something else is wrong here. ya, like $rowB['54'] != 'Y'; // ;) -nathan Yep, I use them all the time. I just meant that I wasn't sure this is what was going to get the OP fixed. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] string vs number
On Feb 5, 2008 1:36 PM, Hiep Nguyen [EMAIL PROTECTED] wrote:
hi all,
i have this php statement:
? if($rowB[$rowA[0]]=='Y') {echo checked;} ?
debugging, i got $rowA[0] = 54, but i want $rowB[$rowA[0]] = $rowB['54'].
is this possible? how do i force $rowA[0] to be a string ('54')?
Type casting shouldn't be an issue in this case. For example,
you're not trying to convert alphanumeric characters to int() (which
would actually go to boolean - 0/1), so when trying this case, the
condition is True:
?
$rowA[] = 54;
$rowA[] = 63;
$rowA[] = 72;
$rowB['54'] = Y;
$rowB['63'] = N;
$rowB['72'] = N;
if($rowB[$rowA[0]]=='Y') { echo checked.\n; }
?
Because of the loose-typecasting nature of PHP (done on purpose),
'54' does, in fact, equal 54, unless otherwise specifically stated.
--
/Dan
Daniel P. Brown
Senior Unix Geek
? while(1) { $me = $mind--; sleep(86400); } ?
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] string vs number
Casey schreef:
On Feb 5, 2008, at 10:43 AM, Eric Butera [EMAIL PROTECTED] wrote:
On Feb 5, 2008 1:40 PM, Nathan Nobbe [EMAIL PROTECTED] wrote:
On Feb 5, 2008 1:36 PM, Hiep Nguyen [EMAIL PROTECTED] wrote:
hi all,
i have this php statement:
? if($rowB[$rowA[0]]=='Y') {echo checked;} ?
debugging, i got $rowA[0] = 54, but i want $rowB[$rowA[0]] =
$rowB['54'].
is this possible? how do i force $rowA[0] to be a string
('54')?http://www.php.net/unsub.php
php should handle the conversion internally for you.
if you want to type cast a value to a string, simply do
(string)$varname
-nathan
I was thinking about saying that, but php is loosely typed, so 54 ==
'54'. I'm thinking something else is wrong here.
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
I believe this is the difference with arrays:
$a = array(2 = foo);
Array(0 = null, 1 = null, 2 = foo)
$a = array(2 = foo);
Array(2 = foo)
not true:
alice:~ jochem$ php -r '
$a = array(2 = foo); $b = array(2 = foo); var_dump($a, $b);'
array(1) {
[2]=
string(3) foo
}
array(1) {
[2]=
string(3) foo
}
php treats anything that is the string equivelant of an integer as an integer
when
it comes to array keys - which comes down to the fact that you cannot therefore
use
a string version of an integer as an associative key.
so $a[2] and $a[2] are always the same element.
the same is not exactly true for floats - although you can use them as array
keys you'll
notice in the output of code below that they are stripped of their decimal part
(essentially
a floor() seems to be performed on the float value. I have no idea whether this
is intentional,
and whether you can therefore rely on this behaviour:
alice:~ jochem$ php -r '
$a = array(2.5 = foo); $b = array(2.5 = foo); var_dump($a, $b);'
array(1) {
[2]=
string(3) foo
}
array(1) {
[2.5]=
string(3) foo
}
alice:~ jochem$ php -r '
$a = array(2.6 = foo); $b = array(2.6 = foo); var_dump($a, $b);'
array(1) {
[2]=
string(3) foo
}
array(1) {
[2.6]=
string(3) foo
}
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
