IF POST Variables equals then redirect - php

Question

Im trying to get form post values and if they match certain criteria redirect only my page doesnt seem to...
I have a form with multiple input fields
HTML
<form method="post" action="?page_id=151">
<div style="display: block;" id="Q1">
<label for="vehicleType">1. What type of vehicles do you have?</label>
<select id="vehicleType" name="vehicleType">
<option selected="selected" value="choose">Please choose</option>
<option value="hgv">HGV</option>
<option value="psv">PSV</option>
<option value="lgv">LGV</option>
<option value="car">Car</option>
<option value="mixed">Mixed Fleet</option>
</select>
</div>
<div id="Q2group1">
<label for="coverageRegion">2. Do you require national or international coverage?</label>
<select id="coverageRegion" name="coverageRegion">
<option selected="selected" value="choose">Please choose</option>
<option value="national">National</option>
<option value="international">International</option>
</select>
</div>
<div id="Q2others">
<label for="pricing">2. Do you prefer a fixed weekly price or a pump-related price?</label>
<select id="pricing" name="pricing">
<option selected="selected" value="choose">Please choose</option>
<option value="fixed">Weekly fixed price</option>
<option value="pump">Pump-related price</option>
</select>
</div>
<div id="Q3group1">
<label for="locationType">3. What type of site do you prefer?</label>
<select id="locationType" name="locationType">
<option selected="selected" value="choose">Please choose</option>
<option value="truckstops">Truck stops at lowest price</option>
<option value="motorway">Branded motorway sites</option>
</select>
</div>
<div id="Q3others">
<label for="siteCoverage">3. What site coverage do you need?</label>
<select id="siteCoverage" name="siteCoverage">
<option value="choose">Please choose</option>
<option value="countysites">County</option>
<option value="nationalsites">National</option>
</select>
</div>
<div id="Q4others">
<label for="county">4. Select your county:</label>
<select id="county" name="county">
<option value="choose">Please choose</option>
<optgroup label="England">
<option>Bedfordshire</option>
<option>Berkshire</option>
<option>Bristol</option>
<option>Tyrone</option>
</optgroup>
</select></div>
<div id="searchbuttondiv"> <input type="submit" id="searchbutton" onclick="_gaq.push(['_trackEvent', 'Fuel Card Search', 'Homepage Select Criteria'])"> </div>
</form>
PHP
if ($_POST['vehicleType'] == 'car' && $_POST['pricing'] == 'fixed' && $_POST['coverageRegion'] == 'national') {
echo '<script>alert("hi");</script>';
// header('Location: /car-weekly-national/');
}

Answer 1

One of your conditions is falling (and because they are all bound by AND, all of the if statement fails.
Have an else statement where you var_dump all relevant variables and see what's wrong.

Answer 2

Sorry everyone, oversight by me, I was checking to see if the wrong variable had been posted, wouldn't have found it if it wasn't for the suggestions to add an else statement, thanks!