Draw a Google Chart with undefined number of lines - php

Question

I need to draw a Google Chart with an undefined number of lines (rows). Lets suppose I need to draw the number of goals of two teams in a certain day (the number of teams is fixed for the example, but it could be anyone, the number of days are the same for all teams). I have this array:
Array
(
[team1] => Array
(
[0] => Array
(
[day] => 1
[goals] => 3
)
[1] => Array
(
[day] => 2
[goals] => 1
)
[2] => Array
(
[day] => 3
[goals] => 0
)
)
[team2] => Array
(
[0] => Array
(
[day] => 1
[goals] => 1
)
[1] => Array
(
[day] => 2
[goals] => 2
)
[2] => Array
(
[day] => 3
[goals] => 4
)
)
)
I have tried creating this loop:
$resultArray = array();
$resultArray['cols'][] = array('label' => "Day", 'type' => 'string');
// $array is the one shown before
foreach($array as $key => $chartData){
$resultArray['cols'][] = array('label' => $key, 'type' => 'number');
foreach($chartData as $data){
$resultArray['rows'][] = array('c' => array( array('v' => $data['day']), array('v' => $data['goals'])));
}
}
The problem is that the chart only draws one line with the data from both teams joined all together instead two lines one for each team.
I would really appreciate any help.

Answer 1

I think your making it harder on yourself using associative arrays for google chart data. The data structure of your array is also adding some challenges to the loop making it a bit more challenging to get the data out in the desired format:
$chartData = array();
$chartData[] = array("Day");
foreach($array as $key => $a){
$chartData[0][] = $key;
for($i = 0; $i < count($a); $i++){
if(!is_array($chartData[$i+1])){
$chartData[$i+1] = array();
$chartData[$i+1][] = $a[$i]['day'];
}
$chartData[$i+1][count($chartData[0])-1] = $a[$i]['goals'];
}
}
This should give you the format you need to have the desired chart data table:
[
["Day","team1","team2"]
[1,3,1]
[2,1,2]
[3,0,4]
]
Creating a line for the number of goals (y Axis) for each team over the number of days (x axis). Hope this helps