Trying to Insert data to multiple tables in single query in php - php

Question

Im trying to add data to multiple tables using a single query.
These two tables are contacts and address. I think the issue is with my address table. IS it a good idea to separate my address table? since multiple contacts can share the same address.(family)
Query for inserting data
$sql = "INSERT INTO contacts (firstName,lastName,nickName,cellNumber,homeNumber,workNumber) VALUES ($firstName,$lastName,$nickName,$cellNumber,$homeNumber,$workNumber) "
. "INSERT INTO address(street,city,state,country) VALUES($street,$city,$state,$country) INSERT INTO contacts (email,birthday,memo)"
. "values($email,$birthday,$memo)";
My HTML form
<fieldset>
<legend>Register Form</legend>
<div>
<input type="text" name="firstName" placeholder="First Name"/>
</div>
<div>
<input type="text" name="lastName" placeholder="Last Name"/>
</div>
<div>
<input type="text" name="nickName" placeholder="Nick Name"/>
</div>
<div>
<input type="text" name="cellNumber" placeholder="Cell Number"/>
</div>
<div>
<input type="text" name="homeNumber" placeholder="Home Number"/>
</div>
<div>
<input type="text" name="workNumber" placeholder="Work Number"/>
</div>
<div>
<input type="text" name="street" placeholder="Street"/>
</div>
<div>
<input type="text" name="city" placeholder="City"/>
</div>
<div>
<input type="text" name="state" placeholder="state"/>
</div>
<div>
<input type="text" name="country" placeholder="country"/>
</div>
<div>
<input type="text" name="email" placeholder="Email"/>
</div>
<div>
<input type="text" name="birthday" placeholder="Birthday"/>
</div>
<div>
<div class="small"></div>
<textarea name="memo" placeholder="Memo"></textarea>
</div>
<input type="submit" name="addContact" value="Send"/>
</fieldset>

Answer 1

Thomas i try your query u should modify and try this query:
Code :
$sql = "INSERT INTO contacts (firstName,lastName,nickName,cellNumber,homeNumber,workNumber) VALUES ($firstName,$lastName,$nickName,$cellNumber,$homeNumber,$workNumber) " ; "INSERT INTO address(street,city,state,country) VALUES($street,$city,$state,$country)"; "INSERT INTO contacts (email,birthday,memo)
values($email,$birthday,$memo)";
I think it should be must helpful.