<?php
$superheroes = [
    "spider-man" => [
        "name" => "Peter Parker",
        "email" => "peterparker@mail.com",
    ],
    "super-man" => [
        "name" => "Clark Kent",
        "email" => "clarkkent@mail.com",
    ],
    "iron-man" => [
        "name" => "Harry Potter",
        "email" => "harrypotter@mail.com",
    ]
];

foreach($superheroes as $superhero) {
    foreach($superhero as $paramName => $paramValue) {
        echo "$paramName $paramValue" . "<br>";
    }
}
?>