PHP & REST API Integration, Cant Get page to load properly

Hi WordPress Community,

I’ve been building out a custom php script to allow users to input data in a form and pull information from a REST API for the RentJuice real estate rental search platform. I’m pretty sure I now have everything in working order except for what happens upon clicking the “submit” button.

Basically, upon clicking “submit” the page should reload with a list of rental properties available below the search form. Instead, upon submission, the script is somehow redirecting to the site’s home page. I’ve pasted the code below (and cut a number of the option values for the sake of it not being super long. The page in action is currently at: http://blrboston.com/rental-search-test/ . Any help would be greatly appreciated!

<?php
/*
	Template name: Rental Search Test
*/
get_header();
?>

<?php
/*
Definitions for form field variables
*/

$minrent = $_POST["Min Rent"];
$maxrent = $_POST["Max Rent"];
$minbeds = $_POST["Min Beds"];
$maxbeds = $_POST["Max Beds"];
$neighborhood = $_POST["Neighborhood"];
$minbaths = $_POST["Baths"];
$pets = $_POST["Pets"];
$mindateavailable = $_POST["Earliest Date Available"];
$maxdateavailable = $_POST["Latest Date Available"];

if (!isset($_POST['submit'])) { // if page is not submitted to itself echo the form
?>

<div class="rentalsearch">
<form method="post" action="<?php echo $PHP_SELF;?>">
<table>
<tr><td>
<label for=min_rent>Min Rent</label><br>

<select name="Min Rent">
  <option value="0">-</option>
  <option value="1000">$1,000</option>
  <option value="2000">$2,000</option>
  <option value="3000">$3,000</option>
  <option value="4000">$4,000</option>
  <option value="5000">$5,000</option>
  <option value="6000">$6,000</option>
  <option value="7000">$7,000</option>
  <option value="8000">$8,000</option>
  <option value="9000">$9,000</option>
  <option value="10000">$10,000</option>
  <option value="11000">$11,000</option>
  <option value="12000">$12,000</option>
  <option value="13000">$13,000</option>
  <option value="14000">$14,000</option>
  <option value="15000">$15,000</option>
</select>
</td>
<td>
<label for=max_rent>Max Rent</label>
<select name="Max Rent">
  <option value="100000">-</option>
  <option value="1000">$1,000</option>
  <option value="2000">$2,000</option>
  <option value="3000">$3,000</option>
  <option value="4000">$4,000</option>
  <option value="5000">$5,000</option>
  <option value="6000">$6,000</option>
  <option value="7000">$7,000</option>
  <option value="8000">$8,000</option>
  <option value="9000">$9,000</option>
  <option value="10000">$10,000</option>
  <option value="11000">$11,000</option>
  <option value="12000">$12,000</option>
  <option value="13000">$13,000</option>
  <option value="14000">$14,000</option>
  <option value="15000">$15,000</option>
  <option value="16000">$16,000</option>
  <option value="17000">$17,000</option>
  <option value="18000">$18,000</option>
  <option value="19000">$19,000</option>
  <option value="20000">$20,000</option>

</select>
</td>

<td>
<label for=min_beds>Min Beds</label>
<select name="Min Beds">
  <option value="0">-</option>
  <option value="0">Studio</option>
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
  <option value="4">4</option>
  <option value="5">5</option>
  <option value="6">6</option>
  <option value="7">7</option>
  <option value="8">8</option>
  <option value="9">9</option>
  <option value="10">10</option>
</select>
</td>

<td>
<label for=max_beds>Max Beds</label>
<select name="Max Beds">
  <option value="50">-</option>
  <option value="0">Studio</option>
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
  <option value="4">4</option>
  <option value="5">5</option>
  <option value="6">6</option>
  <option value="7">7</option>
  <option value="8">8</option>
  <option value="9">9</option>
  <option value="10">10</option>
</select>
</td>

<td>
</td>

</tr>
<tr><td><br>
<label for=neighborhood>Neighborhood</label>

<br>

<select name="Neighborhood" multiple="yes">
<option value="5">Allston</option>
<option value="759">Arlington</option>
<option value="12">Back Bay</option>
<option value="2562">Sullivan Square</option>
<option value="1138">Teele Square</option>
<option value="33">Theatre District</option>
<option value="794">Waltham</option>
<option value="2563">Washington Square</option>
<option value="1142">West Somerville</option>
<option value="1136">Winter Hill</option>
</select>
</td>

<td>
<label for=min_baths>Baths</label>
<br>
<select name="Baths" style="width:100px;">
  <option value="0">-</option>
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
  <option value="4">4</option>
  <option value="5">5</option>
</select>
</td>

<td>
<label for=pets>Pets</label>
<br>
<select name="Pets" style="width:100px;">
  <option value="*">-</option>
  <option value="cats">Cats</option>
  <option value="dogs">Dogs</option>
  <option value="both">Cats and Dogs</option>
</select>
</td>

<td>
<label for=min_date_available>Earliest Move Date</label>
<select name="Earliest Date Available" multiple="yes">
<option value="*">Any</option>
<option value="1970-01-01">Any Past Date</option>
<option value="2011-02-01">February 1, 2011</option>
<option value="2011-02-15">February 15, 2011</option>
<option value="2011-03-01">March 1, 2011</option>
<option value="2011-03-15">March 15, 2011</option>
<option value="2011-04-01">April 1, 2011</option>
<option value="2011-04-15">April 15, 2011</option>
<option value="2011-05-01">May 1, 2011</option>
<option value="2012-09-01">September 1, 2012</option>
<option value="2012-09-15">September 15, 2012</option>
<option value="2012-10-01">October 1, 2012</option>
<option value="2012-10-15">October 15, 2012</option>
<option value="2012-11-01">November 1, 2012</option>
<option value="2012-11-15">November 15, 2012</option>
<option value="2012-12-01">December 1, 2012</option>
<option value="2012-12-15">December 15, 2012</option>
</select>
</td>

<td>
<label for=max_date_available>Latest Move Date</label>
<select name="Latest Date Available" multiple="yes">
<option value="*">Any</option>
<option value="1970-01-01">Any Past Date</option>
<option value="2011-02-01">February 1, 2011</option>
<option value="2012-11-01">November 1, 2012</option>
<option value="2012-11-15">November 15, 2012</option>
<option value="2012-12-01">December 1, 2012</option>
<option value="2012-12-15">December 15, 2012</option>
</select>
</td>
</tr>

<tr>
<td>
<input type="submit" value="submit" name="submit"><br />
</td>
</tr>

</table>
</form>

<?
} else {
$result = unserialize(file_get_contents('http://api.rentjuice.com/{api key}/listings.php?min_beds='.minbeds.'&max_beds='.$maxbeds.'&has_photos=1&pets='.$pets.''));

foreach ($result['listings'] as $listing) {
if (isset($listing['photos'][0]['thumbnail']))
echo '<img src="'.$listing['photos'][0]['thumbnail'].'"><br>';
echo $listing['title'];
echo '<hr>';
}

 }?>
</div>

<?php get_footer(); ?>