adding elements at identical keys in multiple multidimensional arrays - php

Question

I'm trying to do a web application with php and MySQL that can graph the estimate effort of a person based on the data stored in the data base
$luna_start = date('n', strtotime($row_task['data_i']));
$luna_end = date('n', strtotime($row_task['data_s']));
$luna_curenta=$luna_start;
$ultimazi_luna_curenta= cal_days_in_month(CAL_GREGORIAN, $luna_curenta,"2012");
while ($luna_curenta<=$luna_end){
//construieste vectorul
for ($i = 1; $i <= $ultimazi_luna_curenta; $i++) {
$data_curenta= date("Y-m-d", mktime(0, 0, 0, $luna_curenta, $i, 2012));
if (($data_curenta>=$row_task['data_i'])&&($data_curenta<=$row_task['data_s'])){
$efort_a['a'.$row_task['task_id']][$data_curenta]=$efort_mediu;
}
}
$luna_curenta++;
}
all that trouble for getting an array so that i can graph. the array $efort_a looks like this:
Array(
[a19] => Array(
[2012-09-20] => 2.84
[2012-09-21] => 2.84
.......
[2012-10-21] => 2.84
[2012-10-22] => 2.84
)
[a22] => Array
(
[2012-10-01] => 0.1
[2012-10-02] => 0.1
.....
[2012-11-05] => 0.1
[2012-11-06] => 0.1
[2012-11-07] => 0.1
......
[2012-11-25] => 0.1
......
[2012-11-30] => 0.1
)
[a16] => Array
(
[2012-10-08] => 4
[2012-10-09] => 4
[2012-10-10] => 4
[2012-10-11] => 4
......
[2012-10-18] => 4
[2012-10-19] => 4
)
)
further more I'm doing a little more array processing.
extract($efort_a);
$graf_data= array_add($a19,$a22,$a16);
$data = new GoogleChartData($graf_data);
$chart->addData($data);
the problem with all this code is that it isn't a dynamic one. the arrays a19, a22, a16 are named statically and in this particular case the user had only 3 tasks (task id 19, 22 and 16) ... but what if the user has multiple tasks ?.
so the questions is can this code be reorganized, maybe as a function i don't know how, to be a dynamic one ?
could it be possible to do a function that graph's all the users effort (one graph, multiple lines- one for each user)
ps: the function to do the adding of arrays based on keys is:
function array_add($a1, $a2) {
// adds the values at identical keys together
$aRes = $a1;
foreach (array_slice(func_get_args(), 1) as $aRay) {
foreach (array_intersect_key($aRay, $aRes) as $key => $val) $aRes[$key] += $val;
$aRes += $aRay;
}
return $aRes;
}
========================================= day 2 =======================
after some thinking i thought to give another try... so in order to name the keys of array effort_a dynamically i need to know where to stop with the incrementation so :
$sql_nrtask='SELECT *, COUNT(user) AS nr_task
FROM task
WHERE user="ASD"
ORDER BY data_i ASC
';
$query_nrtask= mysql_query($sql_nrtask) or die ('rrr');
while ($row_nrtask= mysql_fetch_array($query_nrtask)) {
$nr_task=$row_nrtask['nr_task']; // no we know how many sub-arrays we'll have
}
for ($j++;$j<=$nr_task;$j++){
while ($luna_curenta<=$luna_end){
//construieste vectorul
for ($i = 1; $i <= $ultimazi_luna_curenta; $i++) {
$data_curenta= date("Y-m-d", mktime(0, 0, 0, $luna_curenta, $i, 2012));
if (($data_curenta>=$row_task['data_i'])&&($data_curenta<=$row_task['data_s'])){
$efort_a['$a'.$j][$data_curenta]=$efort_mediu;
}
}
$luna_curenta++;
}
}
the problem is know that i don't know hot to merge the arrays within $efort_a with 2 conditions:
keeping indexes where they are the same and adding values
adding a new index where it is a new element