[PHP] does array_slice not work on multidimensional arrays?
does array_slice not work on multidimensional arrays? I have one multidimensional array, and when I run it thru' array_slice() nothing happens, that I can tell. If it does not work on multidimensional arrays, what is the *simplest* workaround? (I am already working past what was budgeted for this this script.. so I really want to avoid anything but the most newbie of hacks to achieve this.) //PHP Version 4.3.9 thank you for any reply! John Butler (Govinda) govinda.webdnat...@gmail.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] does array_slice not work on multidimensional arrays?
I worked around the issue by running the too fat multi-dimed array
through a foreach{ ... if($counter <= $myArrLength)
{ $MyNowSlicedMultiDimArr[$key]=$value; }} ,
but I'd still (always!) love to hear from you seasoned PHPers on
this topic (anytime actually!).
I learn the most from your commentary.
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Re: [PHP] Re: does array_slice not work on multidimensional arrays?
does array_slice not work on multidimensional arrays?
I have one multidimensional array, and when I run it thru'
array_slice() nothing happens, that I can tell.
If it does not work on multidimensional arrays, what is the
*simplest*
workaround? (I am already working past what was budgeted for this
this script.. so I really want to avoid anything but the most newbie
of hacks to achieve this.)
//PHP Version 4.3.9
Works for me in PHP 5:
cat a.php
$a1 = array (array (1,2,3,4), array ('a','b','c'), array (true,
false));
$a2 = array_slice ($a1, 1, 2);
var_dump ($a2);
php5 a.php
5.2.5
array(2) {
[0]=>
array(3) {
[0]=>
string(1) "a"
[1]=>
string(1) "b"
[2]=>
string(1) "c"
}
[1]=>
array(2) {
[0]=>
bool(true)
[1]=>
bool(false)
}
}
It seems clear to me, but do you also agree that my evidence is that
array_slice() does NOT work on multi-dimmed arrays on v.4.3.9?
Here is the evidence:
this:
var_dump($BuildPerUniqueDateArray);
echo"\n\n~\n\n";
array_slice($BuildPerUniqueDateArray, 1, 2);
var_dump($BuildPerUniqueDateArray);
returns:
array(12) {
["2009-08-08"]=>
array(2) {
["t7solar_landing"]=>
string(1) "2"
["aweber_7solar_aw"]=>
string(1) "1"
}
["2009-08-07"]=>
array(3) {
["t7solar_landing"]=>
string(1) "2"
["aweber_7solar_aw"]=>
string(1) "1"
["aweber_7solar_confirm"]=>
string(1) "1"
}
["2009-08-06"]=>
array(3) {
["aweber_7solar_confirm"]=>
string(1) "5"
["t7solar_landing"]=>
string(1) "6"
["aweber_7solar_aw"]=>
string(1) "3"
}
["2009-08-05"]=>
array(3) {
["aweber_7solar_confirm"]=>
string(1) "1"
["t7solar_landing"]=>
string(1) "3"
["aweber_7solar_aw"]=>
string(1) "4"
}
...
~
array(12) {
["2009-08-08"]=>
array(2) {
["t7solar_landing"]=>
string(1) "2"
["aweber_7solar_aw"]=>
string(1) "1"
}
["2009-08-07"]=>
array(3) {
["t7solar_landing"]=>
string(1) "2"
["aweber_7solar_aw"]=>
string(1) "1"
["aweber_7solar_confirm"]=>
string(1) "1"
}
["2009-08-06"]=>
array(3) {
["aweber_7solar_confirm"]=>
string(1) "5"
["t7solar_landing"]=>
string(1) "6"
["aweber_7solar_aw"]=>
string(1) "3"
}
["2009-08-05"]=>
array(3) {
["aweber_7solar_confirm"]=>
string(1) "1"
["t7solar_landing"]=>
string(1) "3"
["aweber_7solar_aw"]=>
string(1) "4"
}
...
John Butler (Govinda)
govinda.webdnat...@gmail.com
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Re: [PHP] Re: does array_slice not work on multidimensional arrays?
It seems clear to me, but do you also agree that my evidence is that array_slice() does NOT work on multi-dimmed arrays on v.4.3.9? Here is the evidence: this: var_dump($BuildPerUniqueDateArray); echo"\n\n~\n\n"; array_slice($BuildPerUniqueDateArray, 1, 2); var_dump($BuildPerUniqueDateArray); It seems clear to me that you are dumping /the same/ array twice. Aha. I see now. I had to *assign* the results of the array_slice to a [new] array and then use that ... (trying to do something and expecting the results to "stick" even without assigning them to a var, bites me every week or so. I'll get it through my old habits-from-other-languages skull eventually.) Thank you Nisse, -Govinda -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Re: does array_slice not work on multidimensional arrays?
It is annoying working with arrays sometimes, as some functions work on the actual array, while others return the results of working on the array without changing anything. Is there any particular reason for that? ...you mean what are the reasons for the different ways the arrays work? Then you must be asking the list in general (not me ;-)) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] reason for a "Notice:.." on one site but not another? (Same code.)
Hi sunday coders,
I've been using this kind of logic on one PHP site I work on to
display one thing or another depending on whether the form was
submitted or not:
if($_POST['UserWishesDateRange']) { //--line 79
echo'submitted';
} else {
echo'NOT submitted';
}
and it works great on that site.
But on another site it still works, but gives this error:
Notice: Undefined index: UserWishesDateRange in /home/vs/site/phvs/bl/
7solarsecrets/admin/trackingcode.html on line 79
I assume that is because the error display settings are set to a more
rigorous level in this latter site.
Is this correct?
(Both sites reside on servers where I am not the admin.)
John Butler (Govinda)
govinda.webdnat...@gmail.com
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Re: [PHP] reason for a "Notice:.." on one site but not another? (Same code.)
http://us3.php.net/manual/en/errorfunc.configuration.php#ini.error-reporting
Thank you guys for the isset() heads up. And Ben, for this good
explanation of error reporting!
As others have pointed out, it's a good idea to call isset() on a
POST-variable before trying to get at its value. This will avoid a
notice being thrown.
OK, and I can work around all this anyway, but I would love to get it
all in one line of code, that essentially says: (pseudocode)
if ($IamNotEmpty && $IamEqualto='T') {
(where those are both the same var)
http://us2.php.net/manual/en/function.filter-input.php
The filter_* functions are only available in core since 5.2.0, though.
OK, ..good to plant seeds, but since that server is PHP 4.3, I'll save
my brain now for until I can actually integrate that study.
John Butler (Govinda)
govinda.webdnat...@gmail.com
Re: [PHP] reason for a "Notice:.." on one site but not another? (Same code.)
if(isset($_POST['UserWishesDateRange']) &&
$_POST['UserWishesDateRange']
== 'T') {
Thought I tried that. Apparently not exactly; it works now! Thanks.
I know it is clunky but I wanted to see how compact it could be done.
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Re: [PHP] reason for a "Notice:.." on one site but not another? (Same code.)
If you switch it around you'll get a notice because the IF evaluates
from left to right. So you just want to make sure you check isset()
first.
This would throw a notice:
if($_POST['UserWishesDateRange'] == 'T' &&
isset($_POST['UserWishesDateRange'])) {
Aha! That must be what I tried and was still getting the notice!
Interesting that it works (without notice) if we check against the
isset () one first. It makes if() look more intelligent that I would
think... as if it saying, "good now that we've established that the
var isset, now is it also equal to '___'., as opposed to just, "is var
set, and is var equal to "___'.
Re: [PHP] reason for a "Notice:.." on one site but not another? (Same code.)
If you switch it around you'll get a notice because the IF evaluates
from left to right. So you just want to make sure you check isset()
first.
This would throw a notice:
if($_POST['UserWishesDateRange'] == 'T' &&
isset($_POST['UserWishesDateRange'])) {
Aha! That must be what I tried and was still getting the notice!
Interesting that it works (without notice) if we check against the
isset () one first. It makes if() look more intelligent that I
would
think... as if it saying, "good now that we've established that the
var isset, now is it also equal to '___'., as opposed to just, "is
var
set, and is var equal to "___'.
this is not "intelligence" its just pure math. the '&&' says if BOTH
expressions are true then the whole expression is true.
so if the first one is false, the whole is false, why checking the
next one
in the underlaying C it would be something like this
{
if ( expression == false ) return false;
if ( expression == false) return false;
return true;
}
I would have thought both would have to be true on their own (without
notice) in order for the the combined expression to be true (without
notice). But Shawn pointed out that the order matters; if we check
for the var's value before checking if it isset then we get a notice,
but if the order is reversed, then we get no notice.
Re: [PHP] Embedded foreach loops
On Aug 10, 2009, at 3:43 PM, Jim Lucas wrote: Allen McCabe wrote: I am creating an order form for tickets for a list of performances at a performing arts center. Currently, the form is on paper, and is set up as follows: -Nutcracker - Tues 10/13 - 11am - $4.00 Thanks for letting us know about your new order form. Did you have a question about something? Or simply wanted to let us know? Jim I was thinking free tickets!
Re: [PHP] Embedding foreach loops
I can't seem to get my foreach loops to work, will PHP parse
embedded loops?
yes.
Is this something I need to have in a database to work?
no, you can do it with the arrays... but it may be easier to work
with over the long run if that data was in a db.
Anyway right after you finish creating the array and it's embedded
arrays, in your code, then add this:
var_dump($shows); //--so you can see what you just created. If it
looks right, THEN go on bothering to try and parse it with your
(embedded) foreach's {
--------
John Butler (Govinda)
govinda.webdnat...@gmail.com
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[PHP] how to say "inverse your value" (to a boolean)?
quick Q:
I have this inside a foreach{} that I want to alternate between on
and off so I can alternate the background-color of my 's.
$tableRowBGcolorBoolCounter != $tableRowBGcolorBoolCounter; //-boolean
on and off
I am looking thru' docs and books, but can't remember (nor find now)
in PHP how to say "inverse your value" (to a boolean).
?
TIA! -G
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Re: [PHP] Embedding foreach loops
I did this, and got my arrays dumped (on one line). After adding line returns, here is a snippet: it looks OK. Note that you can see (copy/paste) that array which you just dumped, much better, if you view the source code of the html page. OR you can use to make that format persist thru' to what you see without viewing the source., Like so: echo "\n"; var_dump($theArray); echo "\n"; echo "\n"; My brain is so full of my own work.. and I am newbie compared to most lurking here.. but I am sure we'll figure out your issue if we work on it systematically. OK, your OP just said, "..I can't seem to get my foreach loops to work.." , but you never said exactly what is the problem. Break the problem down to the smallest thing that you can find that is not behaving as you expect it to, and explain THAT to me. We'll do this step by step. -John -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Re: how to say "inverse your value" (to a boolean)?
= ! ! =) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Embedding foreach loops
I am using the print function to display my html. I cannot get the line return ( \n ) character to actually push the html onto the next line, it just gets displayed instead. Should I be using echo? Allen, you off and running again? echo "blah.. \n"; //<-- this will print the literal 'blah.. ' and then a newline into your HTML *source code* echo 'blah.. \n'; //<-- this will print the literal 'blah.. \n' into your HTML *source code* IIRC print is the same as echo. That is not your apparent issue. Say if you are stuck again, and on what exactly. -John -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Re: how to say "inverse your value" (to a boolean)?
echo "something " . (($a = $a^1) ? "red\n" : "green\n"); Re: The "?" char in this line above.. where in the php docs can I read about what that is doing? I have not come across this construct before today, from you guys. thanks -John -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to say "inverse your value" (to a boolean)?
What a lot of good ideas spawned from the OP!
I am learning many things,.. while also actually working (paying
bills), so I regularly have to just go with what I know well.
Anyway, I already have the forearch { loop (for other reasons it is
necessary), and I only needed one color to alternate with the default
white.. so I used this:
forearch { ...
$tableRowBGcolorBoolCounter = !$tableRowBGcolorBoolCounter; //-boolean
on and off
(which then sticks in one CSS class or another for that .
thanks for everyone's feedback.
-John
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Re: [PHP] Embedding foreach loops
Allen, you off and running again? Sure am, thanks, on to the next set of issues. Seems like programming is always moving on from one error to the next :) Currently, I am having trouble with echo and php line-returns. It works on one part of the code, but not on another (instead, prints it to html). For example: [code] $show[show_01][price] * $show_01_qty = $Total_show_01; echo "\n\n\t"; echo "a".$show[show_01][price]."/n/t*/n/tb". $show_01_qty."/n/t=\n\tc".$Total_show_01.""; echo "\n"; [/code] outputs this html [code] a/n/t*/n/tb/n/t= c [/code] Additionally, it won't display the variables, as you can see, even though they will echo out further above in the document. Odd... well you escape a newline char with this slash: \ and not this one: / notice you were not consistent with your use of them. as for the array not being parsed inside your echo statement - I don't see the issue by looking now. Are you saying the EXACT same code does output the expected value for those array elements higher up the script? Show us the code where it is working and again where it is not.. side by side (pasted just after each other in a new post to the list). I assume you are past this next point, but always remember var_dump($myArray); is your friend. Put it just before where you try to echo out some part of the array.. check to be sure the value is there is that element of the multi-dimensional array the way you think it is. -John -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to say "inverse your value" (to a boolean)?
What a lot of good ideas spawned from the OP!
I am learning many things,.. while also actually working (paying
bills), so I regularly have to just go with what I know well.
Anyway, I already have the forearch { loop (for other reasons it is
necessary), and I only needed one color to alternate with the
default white.. so I used this:
forearch { ...
$tableRowBGcolorBoolCounter = !$tableRowBGcolorBoolCounter; //-
boolean on and off
(which then sticks in one CSS class or another for that .
thanks for everyone's feedback.
-John
Yeah, but forearch ain't going to work.
what do you mean? I must have neglected to include more of the
relevant code to show you that it IS working just fine. I will
certainly explain more if you ask.. but the whole point of me
starting the thread was just to be reminded how to inverse a boolean
var's value. Tony answered me; I am happy. I assume you don't want
me (the newbie) to show how I have it working. (?)
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Re: [PHP] how to say "inverse your value" (to a boolean)?
He's pointing out a typo... "forearch" instead of "foreach" :) LOL! I almost always miss the jokes. Thanks for the smiley face to get my (lighter) attention ;-) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
