I'm trying to echo my PHP `while` loop inside an `html` echo.

Basically, I want to echo inside another echo. Is that possible?

Here is my code:

```
<?php

session_start();
require 'config.php';

if (@$_SESSION['username']) {

    $query = "SELECT * FROM `crew_info`";
    $query_run = mysqli_query($conn,$query);

    echo '<!DOCTYPE html>
    <html>
    <head>
        <title>All Crew</title>
    </head>
    <body>

        <table>
            <tr>
                <th>First Name: </th>
                <th>Middle Name: </th>
                <th>Last Name: </th>
                <th>Age: </th>
                <th>Birth Date: </th>
                <th>Birth Place: </th>
                <th>Gender: </th>
                <th>Martial Status: </th>
                <th>Nationality: </th>
                <th>Email Address: </th>
                <th>Address 1: </th>
                <th>Address 2: </th>
                <th>Course: </th>
                <th>School Graduated: </th>
                <th>Remarks: </th>
                <th>Date Added: </th>
                <th>Status: </th>
            </tr>
            <tr>
            while($record = mysqli_fetch_assoc($query_run)) {
            echo "<tr>";
            echo "<th>".$record['first_name']."</th>";
            echo "<th>".$record['middle_name']."</th>";
            echo "<th>".$record['last_name']."</th>";
            echo "<th>".$record['age']."</th>";
            echo "<th>".$record['birth_date']."</th>";
            echo "<th>".$record['birth_place']."</th>";
            echo "<th>".$record['gender']."</th>";
            echo "<th>".$record['martial_status']."</th>";
            echo "<th>".$record['nationality']."</th>";
            echo "<th>".$record['email_address']."</th>";
            echo "<th>".$record['address_1']."</th>";
            echo "<th>".$record['address_2']."</th>";
            echo "<th>".$record['course']."</th>";
            echo "<th>".$record['school_graduated']."</th>";
            echo "<th>".$record['remarks']."</th>";
            echo "<th>".$record['date_added']."</th>";
            echo "<th>".$record['crew_status']."</th>";
        echo "</tr><br>";
            </tr>
        </table>

    </body>
    </html>';
    }    
}
else {
    header('Location: /practice1/index.php');
}

?>

```

I hope someone can help me