Re: [PHP] Looping from A to Z
Richard K Miller wrote:
Good afternoon. I'm having trouble getting PHP to loop from A through
Z. Here is what I tried, coming from a C background:
for ($l = "A"; $l <= "Z"; $l++)
echo $l;
I use this:
for($i='a'; $i != 'aa'; $i++){
print $i;
|
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Looping from A to Z
>>Good afternoon. I'm having trouble getting PHP to loop from A
>>through Z. Here is what I tried, coming from a C background:
>>
>>for ($l = "A"; $l <= "Z"; $l++)
>> echo $l;
>>
>>// Returns A, B, C, ..., X, Y, Z, AA, AB, AC, AD, AE, ... YX, YY, YZ.
(26 * 26 results!)
>>
>>Interestingly, if I make it a "less than" operation instead of "less
than or equal to", it works correctly (except for the Z):
>>
>>for ($l = "A"; $l < "Z"; $l++)
>> echo $l;
>>
>>// Returns A, B, C, ..., W, X, Y (25 results)
>>
>>Anyone know why PHP would do that?
>>
>>Richard
>
>From the PHP docs:
PHP follows Perl's convention when dealing with arithmetic operations on
character variables and not C's. For example, in Perl 'Z'+1 turns into
'AA', while in C 'Z'+1 turns into '[' ( ord('Z') == 90, ord('[') == 91 ).
Note that character variables can be incremented but not decremented.
-Jim
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Looping from A to Z
Good afternoon. I'm having trouble getting PHP to loop from A through Z. Here is what I tried, coming from a C background: for ($l = "A"; $l <= "Z"; $l++) echo $l; // Returns A, B, C, ..., X, Y, Z, AA, AB, AC, AD, AE, ... YX, YY, YZ. (26 * 26 results!) Interestingly, if I make it a "less than" operation instead of "less than or equal to", it works correctly (except for the Z): for ($l = "A"; $l < "Z"; $l++) echo $l; // Returns A, B, C, ..., W, X, Y (25 results) Anyone know why PHP would do that? Richard I don't see the problem. There are 26 letters. If you say start at A and finish before Z, then you should expect 25 letters returned. Maybe there is something I'm not understanding. tedd -- http://sperling.com/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Looping from A to Z
Good afternoon. I'm having trouble getting PHP to loop from A through Z.
Here is what I tried, coming from a C background:
for ($l = "A"; $l <= "Z"; $l++)
echo $l;
// Returns A, B, C, ..., X, Y, Z, AA, AB, AC, AD, AE, ... YX, YY, YZ. (26 *
26 results!)
Interestingly, if I make it a "less than" operation instead of "less than or
equal to", it works correctly (except for the Z):
for ($l = "A"; $l < "Z"; $l++)
echo $l;
// Returns A, B, C, ..., W, X, Y (25 results)
Anyone know why PHP would do that?
Nope... but try...
for ( $l = ord("A"); $l <= ord("Z"); $l++ )
echo $l;
Also maybe check out the range() function.
-philip
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Looping from A to Z
Good afternoon. I'm having trouble getting PHP to loop from A through Z. Here is what I tried, coming from a C background: for ($l = "A"; $l <= "Z"; $l++) echo $l; // Returns A, B, C, ..., X, Y, Z, AA, AB, AC, AD, AE, ... YX, YY, YZ. (26 * 26 results!) Interestingly, if I make it a "less than" operation instead of "less than or equal to", it works correctly (except for the Z): for ($l = "A"; $l < "Z"; $l++) echo $l; // Returns A, B, C, ..., W, X, Y (25 results) Anyone know why PHP would do that? Richard --- Richard K. Miller www.richardkmiller.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
