HW_29.06, Php - rextester

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<?php
//============== 1 ======================
echo "============== 1 ======================\n";
$name = "Name1";
$surename = "Name2";
$middlename = "Name3";
$birthday = 1990;
$adress = "Уличная 1А";
$phone = "123 456 78 90";
$email = "email@email.em";
$pos = "Admin";
$exp = 2;
$salary = 3499.99;

echo <<< HEREDOC
имя: $name
фамилия: $surename
отчество: $middlename
год рождения: $birthday г.
адрес: $adress
телефон: $phone
email: $email
должность: $pos
стаж: $exp г.
зарплата: $salary\n
HEREDOC;
//============== 2 ======================
echo "============== 2 ======================\n";
$user1_bal = 500;
$user2_bal = 253;
$user3_bal = 320;

function show_all() {
   global $user1_bal, $user2_bal, $user3_bal;;
   echo "Balance list:\n", $user1_bal, "\n", $user2_bal, "\n", $user3_bal, "\n";
}
function send(&$from, &$to, $value) {
    $from -= $value;
    $to += $value;
    echo "Send success!\n";
}

show_all();
send($user1_bal, $user2_bal, 100);
send($user2_bal, $user3_bal, 70);
send($user3_bal, $user1_bal, 50);
send($user1_bal, $user2_bal, 30);
show_all();

//============== 3 ======================
echo "============== 3 ======================\n";
$num = 22222;
$num_str = str_split(strval($num));
$result = 0;

echo "Number: ",$num, "\n";
foreach($num_str as $n) {
    $result += $n;   
}
echo "Sum result: ", $result, "\n";
?>

[ + ] Show input
Absolute running time: 0.19 sec, cpu time: 0.06 sec, memory peak: 25 Mb, absolute service time: 0,26 sec