Array_map function in php with parameter

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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'); }

As of PHP 7.4, you can use arrow functions (which are basically short anonymous functions with a briefer syntax) for more succinct code:

$ids = array_map(
    fn($item) => myarraymap($item, $param),
    $data['student_teacher']
);

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