Trying to define variable for updateid button

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PHP

MySQL

I can't figure out how to define the updateid variable so my edit button will load it on my edit page. When I click the edit button created below it goes to my edit page but instead of having the numeric value of the updateID it literally says updateID. I need to figure out how to declare the updateID variable so that it will grab it from the current form and load it on the following edit form. The value that needs to be the updateID value is the "contactsEntryNumber" field.

Here is my code for my sql statement:

$contactSql = "SELECT * FROM `Tickets` as t
          JOIN Contacts as co ON t.CustomerID=co.ContactId
           WHERE t.TicketNumber ='$ticketNumber'
"
;

$contactResult = $conn->query($contactSql);
//echo "<pre>";print_r($contactResult);die;
if ($contactResult->num_rows > 0) {

    $contactRow = $contactResult->fetch_all(MYSQLI_ASSOC);

}

Here is my code for my table with my failed effort to declare the variable:

<table id="Customer_Contacts" class="table table-bordered" style="color:#F46813 ;border-color:#F46813;border:1px">
    <thead class="thead-dark">
    <th >Selected</th>
    <th>Name</th>
    <th>Phone Main</th>
    <th>Phone Mobile</th>
    <th>Phone Home</th>
    <th>Email</th>
    </thead>

    <?php
      $contactsEntryNumber= ['ContactsEntryNumber'];

    foreach ($contactRow as $key=>$value){?>
        <tr>
            <td><?php if($value['Select'] =='-1'){?>
                    class="fa fa-check-circle-o">
                <?php }?></td>
            <td><?=(($value['ContactLast'] !='') ? $value['ContactFirst'].' '.$value['ContactLast'] :'')?></td>
            <td><?=(($value['PhoneMain'] !='') ? $value['PhoneMain'] :'')?></td>
            <td><?=(($value['PhoneMobile'] !='') ? $value['PhoneMobile'] :'')?></td>
            <td><?=(($value['PhoneHome'] !='') ? $value['PhoneHome'] :'')?></td>
            <td><?=(($value['Email'] !='') ? $value['Email'] :'')?></td>
          <td><button class=\"btn btn-primary btn-sm\"><a href=\"contacts_edit.php?updateid=$contactsEntryNumber\" class=\"text-light\">EDIT</a></button></td>
        </tr>
    <?php }?>
</table>

What I have tried:

A lot of things lol and I just don't know enough about PHP yet to see where my error is.