Distribute array to other array

[nurul02]

Hi,

I really need help here,and already running out of any idea.
I have this situation whereby I need to distribute lists of lecturers to all students.
Eg:

Num of students : 10
Num of lecturers : 2
Here I will need to store 5 students under each lecturers

as for odd example,
Num of students : 10
Num of lecturers : 3

Lecturer 1 will have 4 students
Lecturer 2 will have 3 students
Lecturer 3 will have 3 students

how do i loop these 2 array of students and lecturers so I can insert the id of student inside each lecturer record? I am not sure how do I transfer this logic into codes..please.. i really need some idea,some example is very much appreciated

[chathura86]

try this one

<?php
	$students = array('u1', 'u2', 'u3', 'u4', 'u5', 'u6', 'u7', 'u8', 'u9', 'u10');
	$lecturers = array('l1', 'l2', 'l3');

	$class = array();

	$stdCount = count($students);
	$lecCount = count($lecturers);

	for($i=0; $i < $stdCount; $i++)
	{
		$class[$lecturers[$i%$lecCount]][] = $students[$i];
	}

	echo "<pre>";
	var_dump($class);

out put will be like this

array(3) {
  ["l1"]=>
  array(4) {
    [0]=>
    string(2) "u1"
    [1]=>
    string(2) "u4"
    [2]=>
    string(2) "u7"
    [3]=>
    string(3) "u10"
  }
  ["l2"]=>
  array(3) {
    [0]=>
    string(2) "u2"
    [1]=>
    string(2) "u5"
    [2]=>
    string(2) "u8"
  }
  ["l3"]=>
  array(3) {
    [0]=>
    string(2) "u3"
    [1]=>
    string(2) "u6"
    [2]=>
    string(2) "u9"
  }
}

[nurul02]

try this one

<?php
	$students = array('u1', 'u2', 'u3', 'u4', 'u5', 'u6', 'u7', 'u8', 'u9', 'u10');
	$lecturers = array('l1', 'l2', 'l3');

	$class = array();

	$stdCount = count($students);
	$lecCount = count($lecturers);

	for($i=0; $i < $stdCount; $i++)
	{
		$class[$lecturers[$i%$lecCount]][] = $students[$i];
	}

	echo "<pre>";
	var_dump($class);

out put will be like this

array(3) {
  ["l1"]=>
  array(4) {
    [0]=>
    string(2) "u1"
    [1]=>
    string(2) "u4"
    [2]=>
    string(2) "u7"
    [3]=>
    string(3) "u10"
  }
  ["l2"]=>
  array(3) {
    [0]=>
    string(2) "u2"
    [1]=>
    string(2) "u5"
    [2]=>
    string(2) "u8"
  }
  ["l3"]=>
  array(3) {
    [0]=>
    string(2) "u3"
    [1]=>
    string(2) "u6"
    [2]=>
    string(2) "u9"
  }
}

chatura,

ive below codes to be modified so it can go along with ur logic..

previously the original code is as :

$grader ='aa,bb,cc';
$grader = explode(',', $grader);
foreach($grader as $key => $grader)
		 {
		 	$subgradedetail["assgid"]=$_POST["aid"];
		 	$subgradedetail["grader"]=$grader;
			$assignment->setgraderdetail($subgradedetail);
		 }

function setgraderdetail($arr){
//insert the details into database
}

and now i've modified it to:

$grader ='aa,bb,cc';
$student='a,b,c,d,e';
$stdCount = count($students);//will give 5
$lecCount = count($graders);//will give 3
$grader = explode(',', $grader);
for ($i=0; $i<$stdCount ;$i++)
{
		 	$subgradedetail["assgid"]=$_POST["aid"];
		 	$subgradedetail["grader"][$i%$lecCount]=$grader;
                        $subgradedetail["student"]=$student;
			$assignment->setgraderdetail($subgradedetail);
		 }

* $subgradedetail["student"] refers to field student of table in the db

but the new codes do no seem working..can u tell me which part i did it wrong?i appreciate ur initial idea btw..

[chathura86]

$stdCount = count($students);//will give 5
$lecCount = count($graders);//will give 3
$grader = explode(',', $grader);

u are assigning the count before exploding the string

explode both of them before getting the count

Regards

[nurul02]

$stdCount = count($students);//will give 5
$lecCount = count($graders);//will give 3
$grader = explode(',', $grader);

u are assigning the count before exploding the string

explode both of them before getting the count

Regards

chat,
thank u sooo much for ur great idea,now everything is working smoothly =)