"Array to String Conversion" error when constructing a multi-dimensional array

**Erwin Moller** · Jan 17 '07, 09:45 AM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensional array

drako wrote:

Hi,
>
I'm a bit stumped as I am getting a "Notice: Array to String
Conversion" error when trying to do something that on the surface
should be a very simple task - create an array, and write a set of
values to them based on data submitted from POST Fields.
>
Code below:
>
$_SESSION["increment"] = array();
$x = 0 // Counter - This will be
incremented
>
$_SESSION["increment"][$x] = array("incremen t_bond" =>
$_POST["increment_bond "],
"increment_amou nt" = $_POST["increment_amou nt"],
"increment_comm _date1" = $_POST["increment_comm _date1"],
"increment_comm _date2" =$_POST["increment_comm _date2"],
"increment_comm _date3" = $_POST["increment_comm _date3"]);
>
>
It keeps throwing out that error, and does not write any of the POST
Values to the array (the POST values are definitely getting sent, so
that is not the problem).
>
If I dump out the value of $_SESSION["increment"], I get "1A" ?!?
>
I'm sure that there is a pretty simple mistake lurking somewhere - I
just can't seem to figure it out.
>
Any suggestions or hints ?
>
Thanks
Neil.

Hi Neil,

Your code looks perfectly OK to me.
Are you 100% sure this is where the error is thrown?
Did you try:
<pre>
<?php print_r($_POST) ; ?>
</pre>

Does it produce all used postvars you expect?

Regards,
Erwin Moller

**drako** · Jan 17 '07, 09:55 AM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensional array

Erwin,

I have tried <?php print_r($_POST) ; ?>, and it outputs all the POST
vars that were submitted. So now problem here.

And the error is thrown at the line that begins
"$_SESSION["increment"][$x] ........"

I have tried this code on two different systems (5.1.6 on OSX, and
5.2.0 on NetBSD), and the same error keeps occuring.

Very puzzling.

Neil.

Erwin Moller wrote:

drako wrote:
>

Hi,

I'm a bit stumped as I am getting a "Notice: Array to String
Conversion" error when trying to do something that on the surface
should be a very simple task - create an array, and write a set of
values to them based on data submitted from POST Fields.

Code below:

$_SESSION["increment"] = array();
$x = 0 // Counter - This will be
incremented

$_SESSION["increment"][$x] = array("incremen t_bond" =>
$_POST["increment_bond "],
"increment_amou nt" = $_POST["increment_amou nt"],
"increment_comm _date1" = $_POST["increment_comm _date1"],
"increment_comm _date2" =$_POST["increment_comm _date2"],
"increment_comm _date3" = $_POST["increment_comm _date3"]);

It keeps throwing out that error, and does not write any of the POST
Values to the array (the POST values are definitely getting sent, so
that is not the problem).

If I dump out the value of $_SESSION["increment"], I get "1A" ?!?

I'm sure that there is a pretty simple mistake lurking somewhere - I
just can't seem to figure it out.

Any suggestions or hints ?

Thanks
Neil.

>
Hi Neil,
>
Your code looks perfectly OK to me.
Are you 100% sure this is where the error is thrown?
Did you try:
<pre>
<?php print_r($_POST) ; ?>
</pre>
>
Does it produce all used postvars you expect?
>
Regards,
Erwin Moller

**Heiko Richler** · Jan 17 '07, 10:35 AM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensionalarra y

drako wrote:

Hi,
>
I'm a bit stumped as I am getting a "Notice: Array to String
Conversion" error when trying to do something that on the surface
should be a very simple task - create an array, and write a set of
values to them based on data submitted from POST Fields.
>
Code below:
>
$_SESSION["increment"] = array();

Try doing <?php print_r($_SESSI ON["increment"]); ?here ... (*)

$x = 0 // Counter - This will be
incremented

(*) do you have any code in here?
What does <?php print_r($increm ent); ?tell you?

(*) ... and an other <?php print_r($_SESSI ON["increment"]); ?here.

$_SESSION["increment"][$x] = array("incremen t_bond" =>
$_POST["increment_bond "],
"increment_amou nt" = $_POST["increment_amou nt"],
"increment_comm _date1" = $_POST["increment_comm _date1"],
"increment_comm _date2" =$_POST["increment_comm _date2"],
"increment_comm _date3" = $_POST["increment_comm _date3"]);

Heiko
--
http://portal.richler.de/ Namensportal zu Richler
http://www.richler.de/ Heiko Richler: Computer - Know How!
http://www.richler.info/ private Homepage

**drako** · Jan 17 '07, 08:55 PM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensional array

OK,

I inserted the debugging statements as you suggested:

$_SESSION["increment"] = array();
echo '1: ';print_r($_SES SION["increment"]);echo ' ';

$x = 0 // Counter - This will be
incremented
echo '2: ';print_r($incr ement); echo ' ';

$_SESSION["increment"][$x] = array("incremen t_bond" =>
$_POST["increment_bond "],
"increment_amou nt" = $_POST["increment_amou nt"],
"increment_comm _date1" =>
$_POST["increment_comm _date1"],
"increment_comm _date2" =>
$_POST["increment_comm _date2"],
"increment_comm _date3" =>
$_POST["increment_comm _date3"]);

echo '3: ';print_r($_SES SION["increment"]);exit;

<------->
The output is:

1: 1
2:
3: 1A

I'm still no wiser as to what is going on here....

Rgds
Neil.

Heiko Richler wrote:

drako wrote:

Hi,

I'm a bit stumped as I am getting a "Notice: Array to String
Conversion" error when trying to do something that on the surface
should be a very simple task - create an array, and write a set of
values to them based on data submitted from POST Fields.

Code below:

$_SESSION["increment"] = array();

>
Try doing <?php print_r($_SESSI ON["increment"]); ?here ... (*)
>

$x = 0 // Counter - This will be
incremented

>
(*) do you have any code in here?
What does <?php print_r($increm ent); ?tell you?
>
(*) ... and an other <?php print_r($_SESSI ON["increment"]); ?here.
>

$_SESSION["increment"][$x] = array("incremen t_bond" =>
$_POST["increment_bond "],
"increment_amou nt" = $_POST["increment_amou nt"],
"increment_comm _date1" = $_POST["increment_comm _date1"],
"increment_comm _date2" =$_POST["increment_comm _date2"],
"increment_comm _date3" = $_POST["increment_comm _date3"]);

>
Heiko
--
http://portal.richler.de/ Namensportal zu Richler
http://www.richler.de/ Heiko Richler: Computer - Know How!
http://www.richler.info/ private Homepage

**Kimmo Laine** · Jan 18 '07, 09:55 AM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensional array

"drako" <neil@invidion. co.ukwrote in message
news:1169067038 .010143.224210@ a75g2000cwd.goo glegroups.com.. .

OK,
>
I inserted the debugging statements as you suggested:
>
>
$_SESSION["increment"] = array();
echo '1: ';print_r($_SES SION["increment"]);echo ' ';
>
$x = 0 // Counter - This will be
incremented
echo '2: ';print_r($incr ement); echo ' ';

I don't understand what this $increment variable has to do with anything.

--
"Ohjelmoija on organismi joka muuttaa kofeiinia koodiksi" - lpk
http://outolempi.net/ahdistus/ - Satunnaisesti päivittyvä nettisarjis
spam@outolempi. net | rot13(xvzzb@bhg byrzcv.arg)

**drako** · Jan 18 '07, 11:35 AM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensional array

Quote:

I don't understand what this $increment variable has to do with anything.

It doesn't actually relate to anything; but I suspect it was suggested
just to see if anything was output - and nothing was output.

I know if 'register_globa ls' is switched on, this could potentially
cause a problem, but in this case, globals is switched off, so is not
the problem.

I now suspect this is session-related in someway. As the code looks OK,
the problem arises from elsewhere....

Kimmo Laine wrote:

"drako" <neil@invidion. co.ukwrote in message
news:1169067038 .010143.224210@ a75g2000cwd.goo glegroups.com.. .

OK,

I inserted the debugging statements as you suggested:

$_SESSION["increment"] = array();
echo '1: ';print_r($_SES SION["increment"]);echo ' ';

$x = 0 // Counter - This will be
incremented
echo '2: ';print_r($incr ement); echo ' ';

>
I don't understand what this $increment variable has to do with anything.
>
--
"Ohjelmoija on organismi joka muuttaa kofeiinia koodiksi" - lpk
http://outolempi.net/ahdistus/ - Satunnaisesti päivittyvä nettisarjis
spam@outolempi. net | rot13(xvzzb@bhg byrzcv.arg)

**Rik** · Jan 18 '07, 12:55 PM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensional array

drako wrote:

Don't fix bottom-posting, fix topposting.....

Kimmo Laine wrote:

>"drako" <neil@invidion. co.ukwrote in message
>news:116906703 8.010143.224210 @a75g2000cwd.go oglegroups.com. ..

>>OK,
>>>
>>I inserted the debugging statements as you suggested:
>>>
>>>
>> $_SESSION["increment"] = array();
>>echo '1: ';print_r($_SES SION["increment"]);echo ' ';
>>>
>> $x = 0 // Counter - This will be
>>incremented
>>echo '2: ';print_r($incr ement); echo ' ';

>>
>I don't understand what this $increment variable has to do with
>anything.

>
It doesn't actually relate to anything; but I suspect it was
suggested just to see if anything was output - and nothing was output.
>
I know if 'register_globa ls' is switched on, this could potentially
cause a problem, but in this case, globals is switched off, so is not
the problem.
>
I now suspect this is session-related in someway. As the code looks
OK, the problem arises from elsewhere....

Nope.
Keep in mind, that on strings, the [] will get or set the character of the
string at that particular location. My suspicion is that you don't give us
the real code (for where would the incrementation take place?), and you
turn the array into the string ( or number) '1' somewhere. (This often
happens when you use the return of a function (true) that works be a
reference instead of a return by accident.)

So, in the first loop, we've made $_SESSION["increment"] into a string by
accident. On the second loop, if $x = 1, that's the second position in the
string (which was not previously set). You try to set a character to an
array, so the array is converted to a string ('Array'), then it takes the
first character ('A') from that string, and put it at position 1. Hence
resulting in '1A'.

If you gave us the real code, I'd bet we'd spot where the actual overriding
on $_SESSION["increment"] takes place.
--
Rik Wasmus

**Erwin Moller** · Jan 18 '07, 01:35 PM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensional array

Rik wrote:

drako wrote:
>
>
Don't fix bottom-posting, fix topposting.....
>

>Kimmo Laine wrote:

>>"drako" <neil@invidion. co.ukwrote in message
>>news:11690670 38.010143.22421 0@a75g2000cwd.g ooglegroups.com ...
>>>OK,
>>>>
>>>I inserted the debugging statements as you suggested:
>>>>
>>>>
>>> $_SESSION["increment"] = array();
>>>echo '1: ';print_r($_SES SION["increment"]);echo ' ';
>>>>
>>> $x = 0 // Counter - This will be
>>>incremente d
>>>echo '2: ';print_r($incr ement); echo ' ';
>>>
>>I don't understand what this $increment variable has to do with
>>anything.

>>
>It doesn't actually relate to anything; but I suspect it was
>suggested just to see if anything was output - and nothing was output.
>>
>I know if 'register_globa ls' is switched on, this could potentially
>cause a problem, but in this case, globals is switched off, so is not
>the problem.
>>
>I now suspect this is session-related in someway. As the code looks
>OK, the problem arises from elsewhere....

>
Nope.
Keep in mind, that on strings, the [] will get or set the character of the
string at that particular location. My suspicion is that you don't give us
the real code (for where would the incrementation take place?), and you
turn the array into the string ( or number) '1' somewhere. (This often
happens when you use the return of a function (true) that works be a
reference instead of a return by accident.)
>
So, in the first loop, we've made $_SESSION["increment"] into a string by
accident. On the second loop, if $x = 1, that's the second position in
the string (which was not previously set). You try to set a character to
an array, so the array is converted to a string ('Array'), then it takes
the
first character ('A') from that string, and put it at position 1. Hence
resulting in '1A'.
>
If you gave us the real code, I'd bet we'd spot where the actual
overriding on $_SESSION["increment"] takes place.

Damn Rik, sometimes you are scaringly smart.
That sounds like a very probable scenario you described and deducted from
the sparse information given.
Respect!

Erwin Moller

**Toby Inkster** · Jan 18 '07, 02:05 PM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensional array

drako wrote:

I'm sure that there is a pretty simple mistake lurking somewhere - I
just can't seem to figure it out.
>
Any suggestions or hints ?

There doesn't seem to be anything wrong with the code you posted (except
for a missing semicolon after $x = 0), so I suspect the problem lies
somewhere in your other code.

Because of this missing semicolon, I suspect you have chopped out a
section of code between '$x=0' and '$_SESSION["increment"][$x]=array(...)'.
That is almost certainly where your problem lies. In particular, I think
you may have assigned some non-integer value to $x at some point.

Do 'print_r($x);' just before the error happens and see what you see.

--
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact

**drako** · Jan 18 '07, 04:35 PM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensional array

You are correct in assuming that I chopped out a line when I posted
this...

The missing line between '$x=0' and
'$_SESSION["increment"][$x]=array(...)'.

is

if(isset($_SESS ION["increments "])) {$x =
count($_SESSION["increments "]);}

The purpose is to count the number of entries in the array - if count
returns '5', then the last value of $x would have been 4, so we can
assign '5' as the next value in the array.

Could this be the offending line...

Toby Inkster wrote:

drako wrote:
>

I'm sure that there is a pretty simple mistake lurking somewhere - I
just can't seem to figure it out.

Any suggestions or hints ?

>
There doesn't seem to be anything wrong with the code you posted (except
for a missing semicolon after $x = 0), so I suspect the problem lies
somewhere in your other code.
>
Because of this missing semicolon, I suspect you have chopped out a
section of code between '$x=0' and '$_SESSION["increment"][$x]=array(...)'.
That is almost certainly where your problem lies. In particular, I think
you may have assigned some non-integer value to $x at some point.
>
Do 'print_r($x);' just before the error happens and see what you see.
>
--
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact

**drako** · Jan 18 '07, 04:55 PM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensional array

Sorry, the extra line of code above should have read:

if(isset($_SESS ION["increment"])) {$x =
count($_SESSION["increment"]);}

I just noticed the typo, in case anyone has been sharp enough to spot
it...

drako wrote:

You are correct in assuming that I chopped out a line when I posted
this...
>
The missing line between '$x=0' and
'$_SESSION["increment"][$x]=array(...)'.
>
is
>
if(isset($_SESS ION["increments "])) {$x =
count($_SESSION["increments "]);}
>
The purpose is to count the number of entries in the array - if count
returns '5', then the last value of $x would have been 4, so we can
assign '5' as the next value in the array.
>
Could this be the offending line...
>
>
>
Toby Inkster wrote:

drako wrote:

I'm sure that there is a pretty simple mistake lurking somewhere - I
just can't seem to figure it out.
>
Any suggestions or hints ?

There doesn't seem to be anything wrong with the code you posted (except
for a missing semicolon after $x = 0), so I suspect the problem lies
somewhere in your other code.

Because of this missing semicolon, I suspect you have chopped out a
section of code between '$x=0' and '$_SESSION["increment"][$x]=array(...)'.
That is almost certainly where your problem lies. In particular, I think
you may have assigned some non-integer value to $x at some point.

Do 'print_r($x);' just before the error happens and see what you see.

--
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact

**Heiko Richler** · Jan 18 '07, 05:05 PM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensionalarra y

drako wrote:

Sorry, the extra line of code above should have read:
>
if(isset($_SESS ION["increment"])) {$x =
count($_SESSION["increment"]);}

Do you know you do not need $x?

See "Creating/modifying with square-bracket syntax" at

PHP: Arrays - Manual

http://www.php.net/manual/en/language.types.array.php

Arrays

Heiko
--
http://portal.richler.de/ Namensportal zu Richler
http://www.richler.de/ Heiko Richler: Computer - Know How!
http://www.richler.info/ private Homepage

**Rik** · Jan 18 '07, 05:45 PM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensional array

drako wrote:

drako wrote:

>You are correct in assuming that I chopped out a line when I posted
>this...
>>
>The missing line between '$x=0' and
>'$_SESSION["increment"][$x]=array(...)'.
>>
>is
>>
>if(isset($_SES SION["increments "])) {$x =
>count($_SESSIO N["increments "]);}
>>
>The purpose is to count the number of entries in the array - if count
>returns '5', then the last value of $x would have been 4, so we can
>assign '5' as the next value in the array.
>>
>Could this be the offending line...

Sorry, the extra line of code above should have read:
>
if(isset($_SESS ION["increment"])) {$x =
count($_SESSION["increment"]);}
>
I just noticed the typo, in case anyone has been sharp enough to spot
it...

But that's not it afaik. See the comment about just using empty [], this
will just add an array-value to the end.

However, there's something else going on in the adding. Posting the total
code that works on $_SESSION["increment"] woudl speed up the process :-).

You probably have a $_SESSION["increment"] = something(); somehere, where
the function just returns true instead of a processed array, casting it to
the '1' string.
--
Rik Wasmus

**Rik** · Jan 18 '07, 06:05 PM

Re: "Array to String Conversion&quot ; error when constructing a multi-dimensional array

Erwin Moller wrote:

Rik wrote:

>>I now suspect this is session-related in someway. As the code looks
>>OK, the problem arises from elsewhere....

>>
>Nope.
>Keep in mind, that on strings, the [] will get or set the character
>of the string at that particular location. My suspicion is that you
>don't give us the real code (for where would the incrementation take
>place?), and you turn the array into the string ( or number) '1'
>somewhere. (This often happens when you use the return of a function
>(true) that works be a reference instead of a return by accident.)
>>
>So, in the first loop, we've made $_SESSION["increment"] into a
>string by accident. On the second loop, if $x = 1, that's the
>second position in the string (which was not previously set). You
>try to set a character to an array, so the array is converted to a
>string ('Array'), then it takes the
>first character ('A') from that string, and put it at position 1.
>Hence resulting in '1A'.
>>
>If you gave us the real code, I'd bet we'd spot where the actual
>overriding on $_SESSION["increment"] takes place.

>
Damn Rik, sometimes you are scaringly smart.

Well, that remains to be seen, but thank you, would be nice if I would get
paid that way though :-)

That sounds like a very probable scenario you described and deducted
from the sparse information given.

It helps that I cannot get the difference of array_walk() and array_map in
my head, so I'm used to seeing some '1''s or 'A's..

Now let's get the OP to post the code he uses in it's entirety to claim my
fame :-)
--
Rik Wasmus

"Array to String Conversion" error when constructing a multi-dimensional array

"Array to String Conversion" error when constructing a multi-dimensional array

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