动态访问PHP列表

Question

I have 2 tables in the database employee(Ename,id,manager_id) and manager(name,id).1 manager has multiple employees under him. The first line extracts all the employees under 1 manager and creates a list of it. Now, I wish to extract the name of each employee name from the retrieved employee id. How do i access each element of the list? This is what i have tried and it throws errors

$emplyeeId=DB::table('employee')->where('manager_id', $givenManagerId)->lists('id');  
for ($i=0;$i<listCount;$i++)
{
    $Ename = DB::table('employee')->where('id', $emplyeeId($i))-> value('Ename');
}

Answer 1

By looking at the docs (and scroll down a little bit, you find a method named pluck . This will return an array with all the values of the given column.

In your case this would be:

$names = DB::table('employee')->where('manager_id', $givenManagerId)->pluck('Ename');

// This will return the following array:
['Kevin', 'Tom', 'Tina', ...]

Answer 2

Laravel pluck method ,for example get just name from data

$names = DB::table('employee')->where('manager_id', $givenManagerId)->pluck('Ename');

Second method with array_filter

$names = DB::table('employee')->where('manager_id', $givenManagerId)->get()->toArray();


$justNames=array_filter($names, function ($ar) { return $ar['Ename']; });