Concatenating array rows php - php

Question

This may be a stupid question, so please go easy on me if so.
I have a range of queries (MySQL) returning multidimensional arrays.
I then use these array items to populate variables in a string in a foreach loop.
I then need this string to populate a javascript graph so the format of the data wants to be perfect. this idea works with 1 multidimensional array.
However. To do multiple graphs (e.g comparison line graph) I need to express all the data in the same row.
So what I need to be able to do is if possible merge row to row of the array, rather than add it to the end.
Ill show you my working:
foreach ($graph_month as $month) :
$first .= ' { year: "'.$month['month'].'",';
endforeach;
foreach ($graph_data1 as $data) :
$second1 .= ' "'.$data['title'].'": '.$data['totalValue'].' ';
endforeach;
foreach ($graph_data2 as $data) :
$second2 .= ' "'.$data['title'].'": '.$data['totalValue'].' ';
endforeach;
foreach ($graph_data3 as $data) :
$second3 .= ' "'.$data['title'].'": '.$data['totalValue'].' ';
endforeach;
foreach ($graph_data4 as $data) :
$second4 .= ' "'.$data['title'].'": '.$data['totalValue'].' ';
endforeach;
foreach ($graph_data5 as $data) :
$second5 .= ' "'.$data['title'].'": '.$data['totalValue'].' ';
endforeach;
So each of the foreach's is populating a little section of the javascript required, however I need to be able to concatenate all these rows on the right of each other.
e.g
a foreach that can produce:
$first.$second1.$second2.$second3.$second4.$second5
Is this possible, would it be possible to add [i] and [i++] to each variable.

Answer 1

To start with, you could eliminate the extra foreach lines by generating variables like this:
foreach ($graph_month as $month):
for ($i = 1; $i <=5; $i++) {
//$graph_data$i becomes $graph_data1, then $graph_data2 etc.
foreach ($graph_data$i as $data) :
$variable .= ' "'.$data['title'].'": '.$data['totalValue'].' ';
endforeach;
}
// and so on
endforeach;
The outcome of this script is, as you requested, something of this shape:
{year: month, title: value title: value
We can tweak it a little like this:
foreach ($graph_month as $month):
$variable .= ' { year: "'.$month['month'].'",';
for ($i = 1; $i <=5; $i++) {
//$graph_data$i becomes $graph_data1, then $graph_data2 etc.
foreach ($graph_data$i as $data) :
$variable .= ' "'.$data['title'].'": '.$data['totalValue'].' ';
if ($i != 5) {
$variable .= ", ";
}
endforeach;
}
$variable .=
// and so on
endforeach;
and it becomes:
{ year: month, 'title': 'value', 'title': 'value', ... }

Answer 2

You can put same variable:
foreach ($graph_month as $month) {
$variable .= ' { year: "'.$month['month'].'",';
}
foreach ($graph_data1 as $data) {
$variable .= ' "'.$data['title'].'": '.$data['totalValue'].' ';
}
foreach ($graph_data2 as $data) {
$variable .= ' "'.$data['title'].'": '.$data['totalValue'].' ';
}
// and so on
they will concatenate on every loop.

Answer 3

You can use the for loop like this...
<?php
for($i=0;$i<count($graph_month);$i++)
{
$all_values1 = $graph_data1[$i]['title'] . $graph_data1[$i]['totalValue'];
$all_values2 = $graph_data2[$i]['title'] . $graph_data2[$i]['totalValue'];
$all_values3 = $graph_data3[$i]['title'] . $graph_data3[$i]['totalValue'];
$all_values4 = $graph_data4[$i]['title'] . $graph_data4[$i]['totalValue'];
$all_values5 = $graph_data5[$i]['title'] . $graph_data5[$i]['totalValue'];
}
?>
No need to run too may for loop. It will take some extra time to execute...
Try like this....

Answer 4

Use Empty String
$string = '';
Then use this variable with every for loop
foreach($array1 as $value){
$string.= $value['some_data'];
}
foreach($array2 as $value){
$string.= $value['some_data'];
}
Use this $string as final result

Answer 5

Let PHP worry about the JSON formatting just build the object correctly.
<?php
$tojson = array(
0 => array(),
1 => array(),
2 => array(),
3 => array(),
4 => array(),
5 => array()
);
foreach($graph_month as $month)
$tojson[0]['year'] = $month['month'];
foreach($graph_data1 as $data)
$tojson[1][$data['title']] = $data['totalValue'];
foreach($graph_data2 as $data)
$tojson[2][$data['title']] = $data['totalValue'];
foreach($graph_data3 as $data)
$tojson[3][$data['title']] = $data['totalValue'];
foreach($graph_data4 as $data)
$tojson[4][$data['title']] = $data['totalValue'];
foreach($graph_data5 as $data)
$tojson[5][$data['title']] = $data['totalValue'];
$json = json_encode($tojson);
?>