add keys to php array - php

Question

I'm trying to build an array for feeding my Graph. I use the code below:
$rows = $this->Website_model->getGraphDataPositives();
$_rows = array();
$i = 0;
foreach ($rows as $key => $row) {
foreach ($row as $column => $value) {
$_rows[$i]['x'] = $value;
$_rows[$i]['y'] = $value;
$i++;
}
}
This results in the following response:
array(48) {
[0]=>
array(2) {
["x"]=>
string(7) "3283581"
["y"]=>
string(7) "3283581"
}
[1]=>
array(2) {
["x"]=>
string(10) "2013-10-16"
["y"]=>
string(10) "2013-10-16"
}
So it isn't okay yet.. it should say:
array(48) {
[0]=>
array(2) {
["x"]=>
string(7) "3283581"
["y"]=>
string(7) "2013-10-16"
}
[1]=>
array(2) {
["x"]=>
string(10) "1512116"
["y"]=>
string(10) "2013-10-17"
}
Can anyone tell me what I need to adjust in order to get the right output?
/////////////////////////////////
this is what's in $rows (a part of the output)
array(24) {
[0]=>
object(stdClass)#169 (2) {
["SUM(positive)"]=>
string(7) "3283581"
["DATE(stamp)"]=>
string(10) "2013-10-16"
}
[1]=>
object(stdClass)#160 (2) {
["SUM(positive)"]=>
string(7) "1512116"
["DATE(stamp)"]=>
string(10) "2013-10-17"
}

Answer 1

I think the first step here is to fix your output array from the Codeigniter model. Did you create:
$rows = $this->Website_model->getGraphDataPositives();
If so, you should be able to easily go into the function and change the output of the select statement.
Where you find "SUM(positive)" and "DATE(stamp)" in the function getGraphDataPositives(), change it to this (rough example, I don't know what the function looks like):
SUM(positive) AS x
DATE(stamp) AS y
Now you can just run it this way instead:
$rows = $this->Website_model->getGraphDataPositives();
$_rows = array();
foreach ($rows as $i => $row) {
foreach ($row as $column => $value) {
$_rows[$i][$column] = $value;
}
}
Also notice that I removed the $i = 0 and $i++ and replaced $key wit $i. Much easier that way.
Let me know if this helps.
EDIT: I accidentally kept the second $_rows[$i][$column] = $value; in there; that's not needed anymore. You only need one, and the way you have it set up its setting the same value to both entries.
EDIT 2: Just wanted to note that the above example may not be the best option, the best option would be to give more description aliases.
SUM(positive) AS positive
DATE(stamp) AS timestamp
Then set the values like this:
foreach ($rows as $i => $row) {
$_rows[$i]['x'] = $row->positive;
$_rows[$i]['y'] = $row->timestamp;
}
Either option will work, the first is just a little easier.

Answer 2

It would be easier if i knew the column names from SQL but here goes:
$rows = $this->Website_model->getGraphDataPositives();
$_rows = array();
foreach ($rows as $row) {
$_rows[] = array(
'x'=>$row['x-column-name-here'],
'y'=>$row['y-column-name-here']
);
}

Answer 3

foreach ($rows as $key => $row) {
// here $key is index, $row is the object
foreach ($row as $column => $value) {
// here $column will be "SUM(positive)" and the value will be 3283581
// for the first iteration. Since both are assigned $value
// $_rows[$i]['x'] and $_rows[$i]['y'] will be identical
$_rows[$i]['x'] = $value;
$_rows[$i]['y'] = $value;
$i++;
}
}
If you just use the object columns as you defined you should be ok:
foreach ($rows as $row) {
$_rows[$i]['x'] = $row->{'SUM(positive)'};
$_rows[$i]['y'] = $row->{'DATE(stamp)'};
}
You're also not using $key so might as well get rid of that as well.

Answer 4

Your example is kind of basic but I think this should solve its issues:
foreach ($rows as $key => $row) {
foreach ($row as $column => $value) {
$_rows[$key][$column%2==0?'x':'y'] = $value;
}
}
Provided you're using PDO::FETCH_NUM, ie your $rows are numerically indexed.