arrays - Array_map function in php with parameter

Question

I have this

$ids = array_map(array($this, 'myarraymap'), $data['student_teacher']);

function myarraymap($item) {
    return $item['user_id'];
}

I will would like to put an other parameter to my function to get something like

function myarraymap($item,$item2) {
    return $item['$item2'];
}

Can someone can help me ? I tried lots of things but nothing work

Answer 1

You can use an anonymous function and transmit value of local variable into your myarraymap second argument this way:

function myarraymap($item,$item2) {
    return $item[$item2];
}

$param = 'some_value';

$ids = array_map(
    function($item) use ($param) { return myarraymap($item, $param); },
    $data['student_teacher']
);

Normally it may be enough to just pass value inside anonymous function body:

function($item) { return myarraymap($item, 'some_value'); }