<?php
 
error_reporting(-1);
mb_internal_encoding('UTF-8');
 
$employees = ['pu9me1', 'pu3me2', 'pu2an3', 'pu2ma1', 'pu1me2boss'];
$regexp = '/([a-z]{2})([0-9]*)([a-z]{2})([1-3])(boss)?/';
$i = 0;
$x = 0;
$employeesOfPurchaseDepartment = [];
$matches = [];
 
foreach ($employees as $key => $employee) {
    preg_match($regexp, $employee, $matches[$i]);
    $bossStatus = false;
    if (isset($matches[$i][5])) {
        $bossStatus = true;
    }
    $numberOfEmployees = (int)$matches[$i][2] + $x;
    for ($x; $x < $numberOfEmployees; $x++) {
        $employeesOfPurchaseDepartment[$x] = $matches[$i][1] . $matches[$i][3] . $bossStatus . $matches[$i][4] . 400;
    }
    $i++;
}
 
var_dump($employeesOfPurchaseDepartment);

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