PHP fetch the value from the select html page - php

Question

i have below html code
<form action="<?php echo $_SERVER['PHP_SELF'];?>" method="POST" class="contact">
<label id="name">
<h4>name*</h4>
<input type="text" name="name" placeholder="full name" autofocus/>
</label>
<label id="city">
<h4>city</h4>
<select name="city">
<option value="Afghanistan">Afghanistan</option>
<option value="Albania">Albania</option>
</select>
</label>
PHP code
if($_POST["name"] == null)
{
echo "<p class='wrong'><strong>wrong: </strong> name is empty</p>";
}
if($_POST["city"] == null)
{
echo "<p class='wrong'><strong>wrong: </strong> city is empty</p>";
}
this to check the null value and always gives the city is empty that means no value selected

Answer 1

Cannot comment yet.
Maybe try and close the label before the select.
<label id="city">
<h4>city</h4>
</label>
<select name="city">
<option value="Afghanistan">Afghanistan</option>
<option value="Albania">Albania</option>
</select>
and maybe do
<?php echo "<pre>".print_r($_POST,true)."<pre>";
to see what values are set.
And as others have suggested check of the value is empty()
if(!isset($_POST['city'])||empty($_POST['city']))
This returns true if city is empty, has no value or true if it doesn't exist.
Hope this helps!
Edit 1:
Also since the php code is probably on the same page, could just omit the action attribute.
<form method="POST" class="contact">
<label for="city">
<h4>city</h4>
</label>
<select id="city" name="city">
<option value="Afghanistan">Afghanistan</option>
<option value="Albania">Albania</option>
</select>
</form>
also use the for attribute with the ID of the input field you want it to represent