How can I create arrays of suitable candidates based on certain criteria? - php

Question

So to brief you on the question:
I have a number of employees field in a form.
Employees have a salary and the day rate is calculated using (salary / 260)
Assuming employees work a fixed standard day
A task has a certain budget and a date range (start to end - e.g. 29/03/2017 to 31/03/2017)
A task also requires a fixed amount of employees (i.e. 3)
Now with those details in mind, I want to get a list of x employees (the fixed amount, i.e. 3) for which those employee's salaries match the date range of the project, and also slot into the budget.
I started doing this as follows, but have no idea how to continue further:
$employees = array(
0 => array(
'id' => 1,
'salary' => 22000
);
);
$startDate = some_date_here;
$endDate = some_date_here;
foreach($employees as &$user) {
$dayRate = round($user['salary'] / 260, 2);
}
EDIT:
Using http://php.net/manual/en/function.date-diff.php#117691, I managed to find the days between the dates of a project as follows (code update):
function days_diff($d1, $d2) {
$x1 = days($d1);
$x2 = days($d2);
if ($x1 && $x2) {
return abs($x1 - $x2);
}
}
function days($x) {
if (get_class($x) != 'DateTime') {
return false;
}
$y = $x->format('Y') - 1;
$days = $y * 365;
$z = (int)($y / 4);
$days += $z;
$z = (int)($y / 100);
$days -= $z;
$z = (int)($y / 400);
$days += $z;
$days += $x->format('z');
return $days;
}
$startDate = DateTime::createFromFormat('Y-m-d', $startDate);
$endDate = DateTime::createFromFormat('Y-m-d', $endDate);
$projectDays = days_diff($startDate, $endDate);

Answer 1

I think you can do this by the following code.
$startDate = some_date_here;
$endDate = some_date_here;
$noOfDays = calculate_using_end-start;
$employeeRate = [];
$noOfEmployeesRequired = 3;
foreach($employees as $index=>$user) {
$dayRate = round($user['salary'] / 260, 2);
$totalRate = $dayRate*$noOfDays;
$employeeRate[$user['id']] = $totalRate;
}
Now I have all employees Cost hence i sort it and find the cheapest solution
sort($employeeRate);
$output = array();
$counter = 0;
foreach($employeeRate as $id=>$emp) {
array_push($output, $id);
$counter++;
if($counter == $noOfEmployeesRequired) {
break;
}
}