Issues with decoding two JSON feed sources and display with PHP/HTML

I am using two JSON feed sources and PHP to display a real estate property slideshow with agents on a website. The code was working prior to the feed provider making changes to where they store property and agent images. I have made the necessary adjustments for the images, but the feed data is not working now. I have contacted the feed providers about the issue, but they say the problem is on my end. No changes beyond the image URLs were made, so I am unsure where the issue may be. I am new to JSON, so I might be missing something. I have included the full script below. Here are the two JSON feed URLs: http://century21.ca/FeaturedDataHandler.c?DataType=4&EntityType=2&EntityID=2119 and http://century21.ca/FeaturedDataHandler.c?DataType=3&AgentID=27830&RotationType=1. The first URL grabs all of the agents and the second grabs a single agent's properties. The AgentID value is sourced from the JSON feed URL dynamically.

class Core
{

    private $base_url;
    private $property_image_url;
    private $agent_id;

    private $request_agent_properties_url;
    private $request_all_agents_url;

    private function formatJSON($json)
    {
        $from = array('Props:', 'Success:', 'Address:', ',Price:', 'PicTicks:', ',Image:', 'Link:', 'MissingImage:', 'ShowingCount:', 'ShowcaseHD:', 'ListingStatusCode:', 'Bedrooms:', 'Bathrooms:', 'IsSold:', 'ShowSoldPrice:', 'SqFootage:', 'YearBuilt:', 'Style:', 'PriceTypeDesc:');
        $to = array('"Props":', '"Success":', '"Address":', ',"Price":', '"PicTicks":', ',"Image":', '"Link":', '"MissingImage":', '"ShowingCount":', '"ShowcaseHD":', '"ListingStatusCode":', '"Bedrooms":', '"Bathrooms":', '"IsSold":', '"ShowSoldPrice":', '"SqFootage":', '"YearBuilt":', '"Style":', '"PriceTypeDesc":' );
        return str_ireplace($from, $to, $json); //returns the clean JSON

    }

    function __construct($agent=false)
    {
        $this->base_url  = 'http://www.century21.ca';
        $this->property_image_url = 'http://images.century21.ca';

        $this->agent_id = ($agent ? $agent : false);

        $this->request_all_agents_url =
            $this->base_url.'/FeaturedDataHandler.c?DataType=4&EntityType=3&EntityID=3454';

        $this->request_agent_properties_url =
            $this->base_url.'/FeaturedDataHandler.c?DataType=3'.'&AgentID='.$this->agent_id.'&RotationType=1';
    }

    /**
     * getSlides()
     */
    function getSlides()
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $this->request_all_agents_url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        $response = curl_exec($ch);
        curl_close($ch);

        if (empty($response))
            return false;
        else
        $agents = $this->decode_json_string($response);

        // Loop Agents And Look For Requested ID
        foreach ($agents as $agent)
        {
            if (($this->agent_id != false) && (isset($agent['WTLUserID'])) && ($agent['WTLUserID'] != $this->agent_id))
            {
                continue; // You have specified a 
            }

            $properties = $this->getProperties($agent['WTLUserID']);

            $this->print_property_details($properties, $agent);
        }
    }

    /**
     * getProperties()
     */
    function getProperties($agent_id)
    {
        $url = $this->base_url.'/FeaturedDataHandler.c?DataType=3'.'&AgentID='.$agent_id.'&RotationType=1';

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        $response = curl_exec($ch);
        curl_close($ch);

        $json = json_decode($response);

        if (empty($response))
            die('No response 2'); //return false;
        else
            return $this->formatJSON($this->decode_json_string($response));    //this one only need to be updated.
    }

    /**
     * print_property_details()
     */
    function print_property_details($properties, $agent, $html='')
    {
        $BASE_URL = $this->base_url;
        $PROPERTY_IMAGE_URL = $this->property_image_url;

        foreach ($properties as $property)
        {
            $img = $property['Image'];
            // $img = ($property['Image'] ? $property['Image'] : "some url to a dummy image here")

            if($property['ListingStatusCode'] != 'SOLD'){
                $address = $property['Address'];
                $shortaddr = substr($address, 0, -12);
                $html .= "
";

                $html .= "
";
                $html .= "";
                $html .= "
";
                $html .= "
";
                $html .= "". $property['Price'] ."";
                $html .= "". $shortaddr ."";
                $html .= "
";

                $html .= "
";
                $html .= "
";
                $html .= "";
                $html .= "Agent:". $agent['DisplayName'] ."";
                $html .= "
";
                $html .= "</div>";

                $html .= "</div>";
            }
        }
        echo $html;
    }

    function decode_json_string($json)
    {
        // Strip out junk
        $strip = array("{\"Agents\": [","{Props: ",",Success:true}",",\"Success\":true","\r","\n","[{","}]");
        $json = str_replace($strip,"",$json);

        // Instantiate array
        $json_array = array();

        foreach (explode("},{",$json) as $row)
        {
            /// Remove commas and colons between quotes
            if (preg_match_all('/"([^\\"]+)"/', $row, $match)) {
                foreach ($match as $m)
                {
                    $row = str_replace($m,str_replace(",","|comma|",$m),$row);
                    $row = str_replace($m,str_replace(":","|colon|",$m),$row);
                }
            }

            // Instantiate / clear array
            $array = array();

            foreach (explode(',',$row) as $pair)
            {
                $var = explode(":",$pair);

                // Add commas and colons back
                $val = str_replace("|colon|",":",$var[1]);
                $val = str_replace("|comma|",",",$val);
                $val = trim($val,'"');
                $val = trim($val);

                $key = trim($var[0]);
                $key = trim($key,'{');
                $key = trim($key,'}');

                $array[$key] = $val;
            }

            // Add to array
            $json_array[] = $array;
        }

        return $json_array;
    }
}