Very basic PHP array issue - php

Question

I am creating a form where the user selects check boxes of "services" that they might be interested in, then the form gets emailed to me. The problem is weather a box is checked or not, all of the results are being filled in. How do I properly do this?
There are about 25, but here is just a few:
$services = array();
if($_POST['master_planning']) {$services[] = "Master planning";}
if($_POST['snow_plowing']) {$services[] = "Snow plowing";}
if($_POST['fine_gardening']) {$services[] = "Fine Gardening";}
if($_POST['deer_protection']) {$services[] = "Deer Protection";}
$interested = implode(", ", $services);
I know it is a very basic thing, but I can't seem to solve it on my own
HTML is like:
<li><label for="planting"><input type="checkbox" name="planting" id="planting" value="x" /> Planting</label></li>
Ok, I figured (I think) out why all the values are returning true, even if the checkboxes arent clicked, now how do I solve it....
I guess I should of mentioned that this is page 2 of the form (process.php), the actual form is index.php, and I am using an ajax script to pass values.
<script type="text/javascript">
$(document).ready(function() {
$('#submit').click(function () {
var name = $('input[name=name]');
var phone = $('input[name=phone]');
var email = $('input[name=email]');
var master_plan = $('input[name=master_plan]');
var front_foundation = $('input[name=front_foundation]');
var backyard_plan = $('input[name=backyard_plan]');
var specialty_garden = $('input[name=specialty_garden]');
var lawn_cutting = $('input[name=lawn_cutting]');
var lawn_plant_health_care = $('input[name=lawn_plant_health_care]');
var organic_property_care = $('input[name=organic_property_care]');
var seasonal_clean_ups = $('input[name=seasonal_clean_ups]');
var pruning = $('input[name=pruning]');
var fine_gardening = $('input[name=fine_gardening]');
var deer_protection = $('input[name=deer_protection]');
var snow_plowing = $('input[name=snow_plowing]');
var planting = $('input[name=planting]');
var walk = $('input[name=walk]');
var terrace = $('input[name=terrace]');
var wall = $('input[name=wall]');
var outdoor_kitchen = $('input[name=outdoor_kitchen]');
var fireplace = $('input[name=fireplace]');
var driveway = $('input[name=driveway]');
var fencing = $('input[name=fencing]');
var pergola = $('input[name=pergola]');
var swimming_pool = $('input[name=swimming_pool]');
var irrigation = $('input[name=irrigation]');
var lighting = $('input[name=lighting]');
var grading_drainage = $('input[name=grading_drainage]');
var newsletter = $('input[name=newsletter]');
var comments = $('textarea[name=comments]');
if (name.val()=='') {
name.addClass('hightlight');
return false;
} else name.removeClass('hightlight');
if (email.val()=='') {
email.addClass('hightlight');
return false;
} else email.removeClass('hightlight');
var data =
'name=' + name.val() +
'&phone=' + phone.val() +
'&email=' + email.val() +
'&master_plan=' + master_plan.val()+
'&front_foundation=' + front_foundation.val()+
'&backyard_plan=' + backyard_plan.val()+
'&specialty_garden=' + specialty_garden.val()+
'&lawn_cutting=' + lawn_cutting.val()+
'&lawn_plant_health_care=' + lawn_plant_health_care.val()+
'&organic_property_care=' + organic_property_care.val()+
'&seasional_clean_ups=' + seasional_clean_ups.val()+
'&pruning=' + pruning.val()+
'&fine_gardening=' + fine_gardening.val()+
'&deer_protection=' + deer_protection.val()+
'&snow_plowing=' + snow_plowing.val()+
'&planting=' + planting.val()+
'&walk=' + walk.val()+
'&terrace=' + terrace.val()+
'&wall=' + wall.val()+
'&outdoor_kitchen=' + outdoor_kitchen.val()+
'&fireplace=' + fireplace.val()+
'&driveway=' + driveway.val()+
'&fencing=' + fencing.val()+
'&pergola=' + pergola.val()+
'&swimming_pool=' + swimming_pool.val()+
'&irrigation=' + irrigation.val()+
'&lighting=' + lighting.val()+
'&grading_drainage=' + grading_drainage.val()+
'&newsletter=' + newsletter.val() +
'&comments=' + encodeURIComponent(comments.val());
$('.text').attr('disabled','true');
$('.loading').show();
$.ajax({
url: "process.php",
type: "GET",
data: data,
cache: false,
success: function (html) {
if (html==1) {
$('.form').fadeOut('slow');
$('.done').fadeIn('slow');
} else alert('Sorry, unexpected error. Please try again later.');
}
});
return false;
});
});
</script>
Could this be why every result is displaying?

Answer 1

The check you have is incorrect. Lets assume you have this HTML code for the checkbox inside your form:
<input type="checkbox" name="master_planning" value="yes" />
Then on your PHP you want do the check like this:
if(isset($_POST['master_planning']) && $_POST['master_planning'] == 'yes'){
array_push($services, "Master planning"];
}
The function array_push adds the given element or elements at the end of the array, so that would be an easy way to "dynamically" populates an array.