changing a value of an element in a twodimensionla array

[aqazi@inbox.com]

Hi guys I am having a problem with arrayu manipulation.

in my php script i am reading from a csv file.
the content of file is like this:

name,color,quan tity,price;
apple,red,10,$2 ;
mango,green,12, $2.5;
orange,orange,8 ,$1.5;

I am reading the file like this:

$userFile = fopen("data/user.csv", "r");
$data = array();
$record = array();

while (($record = fgetcsv($userFi le, 1000, ",")) !== FALSE)
{
array_push($dat a,$record);
}
fclose($userFil e);

Now if I want to change the quantity of mango what I have to do. I am
trying to do something, like this but it's not entirly correct.

foreach($data as $value)
{

if(((strcasecmp ("mango", $value[0]) == 0))
{
echo $value[1].NL;
$data[$value][1] = "1";*
echo $data[$value][0].NL;
}
}

Can anyone give me a hint how can I change the value here.

Any help will be grealty appreciated.

Thanks
aqazi

[tim]

Re: changing a value of an element in a twodimensionla array


aqazi@inbox.com wrote:[color=blue]
> Hi guys I am having a problem with arrayu manipulation.
>
> in my php script i am reading from a csv file.
> the content of file is like this:
>
> name,color,quan tity,price;
> apple,red,10,$2 ;
> mango,green,12, $2.5;
> orange,orange,8 ,$1.5;
>
> I am reading the file like this:
>
> $userFile = fopen("data/user.csv", "r");
> $data = array();
> $record = array();
>
> while (($record = fgetcsv($userFi le, 1000, ",")) !== FALSE)
> {
> array_push($dat a,$record);
> }
> fclose($userFil e);
>
> Now if I want to change the quantity of mango what I have to do. I am
> trying to do something, like this but it's not entirly correct.
>
> foreach($data as $value)
> {
>
> if(((strcasecmp ("mango", $value[0]) == 0))
> {
> echo $value[1].NL;
> $data[$value][1] = "1";
> echo $data[$value][0].NL;
> }
> }
>
> Can anyone give me a hint how can I change the value here.
>
> Any help will be grealty appreciated.
>
> Thanks
> aqazi[/color]


Hi aqazi

These line aren't doing what you expect they were[color=blue]
> $data[$value][1] = "1";*
> echo $data[$value][0].NL;[/color]

$value is always an array so its trying to access the $data array with
an invalid index.

Earlier on in the script you use[color=blue]
> array_push($dat a,$record);[/color]

The first $record you push onto $data will have an index of 0, the next
record will have an index of 1 etc

So if you change the foreach loop later on to

// v v
foreach($data as $index => $value)
{

// you may be able to use.... if ( $value[0] == 'mango') {
// if not then use '===' not '==' for checking the return value of
strcasecmp

if(((strcasecmp ("mango", $value[0]) === 0))
{
echo $value[2]."\n";
$data[$index][2] = "1";
echo $data[$index][0]."\n";
}
}

If you use strcasecmp then you must use '===' not '==', strcasecmp may
return false. Using the '== 0' will give you the wrong result when
strcasecmp return false because false has a numeric value of 0. It
will give the impression 'mango' was found whether it was in the string
or not.

Tim

[aqazi@inbox.com]

Re: changing a value of an element in a twodimensionla array

Thanks a Lot.
Greatly appreciated.
aqazi

[Jerry Stuckle]

Re: changing a value of an element in a twodimensionla array

aqazi@inbox.com wrote:[color=blue]
> Hi guys I am having a problem with arrayu manipulation.
>
> in my php script i am reading from a csv file.
> the content of file is like this:
>
> name,color,quan tity,price;
> apple,red,10,$2 ;
> mango,green,12, $2.5;
> orange,orange,8 ,$1.5;
>
> I am reading the file like this:
>
> $userFile = fopen("data/user.csv", "r");
> $data = array();
> $record = array();
>
> while (($record = fgetcsv($userFi le, 1000, ",")) !== FALSE)
> {
> array_push($dat a,$record);
> }
> fclose($userFil e);
>
> Now if I want to change the quantity of mango what I have to do. I am
> trying to do something, like this but it's not entirly correct.
>
> foreach($data as $value)
> {
>
> if(((strcasecmp ("mango", $value[0]) == 0))
> {
> echo $value[1].NL;
> $data[$value][1] = "1";*
> echo $data[$value][0].NL;
> }
> }
>
> Can anyone give me a hint how can I change the value here.
>
> Any help will be grealty appreciated.
>
> Thanks
> aqazi
>[/color]

Two things:

The quantity is in $value[2], not $value[1].
$data[$value][1] is incorrect. $value is a row in $data, not an index. So
just use $value.

$value[2] = "1";

should work (but will set the count to a string instead of an integer).


--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attgl obal.net
=============== ===

[Rik]

Re: changing a value of an element in a twodimensionla array

aqazi@inbox.com wrote:[color=blue]
> while (($record = fgetcsv($userFi le, 1000, ",")) !== FALSE)
> {
> array_push($dat a,$record);
> }
> fclose($userFil e);
>
> Now if I want to change the quantity of mango what I have to do. I am
> trying to do something, like this but it's not entirly correct.
>
> foreach($data as $value)
> {
>
> if(((strcasecmp ("mango", $value[0]) == 0))
> {
> echo $value[1].NL;
> $data[$value][1] = "1";*
> echo $data[$value][0].NL;
> }
> }
>
> Can anyone give me a hint how can I change the value here.
>
> Any help will be grealty appreciated.
>
> Thanks
> aqazi[/color]

It would be easier if you defined keys in your $data array, like:
while (($record = fgetcsv($userFi le, 1000, ",")) !== FALSE)
{
$data[$record[0]]= array('color' => $record[1], 'quantity' =>
$record[2], 'price' => $record[3]);
}
fclose($userFil e);

(Assuming name is unique)

And then:

$data['mango']['quantity'] = 3;
or
$data['mango']['quantity']++;
whatever you want.

Without changing the array like I said, your code would be like:
foreach($data as $key => $value)
{
if($value[0]=='mango')
{
$data[$key][3] = 'whatever you want quantity to be';
}
}


or write your won array_search_al l or array_search_al l_recursive function

Grtz,
--
Rik Wasmus