Wufoo webhook for SalesForce Lead

<?php
if($_POST['HandshakeKey'] == 'YOUR HANDSHAKE KEY GOES HERE') {

    function post_lead() {
    
        $wufoo_data = array ();
        
        //first name
        if(!empty($_POST['Field123'])){
            $wufoo_data['first_name'] = $_POST['Field123'];
        }
        
        //last name
        if(!empty($_POST['Field124'])){
            $wufoo_data['last_name'] = $_POST['Field124'];
        }
        
        //phone
        if(!empty($_POST['Field117'])){
            $wufoo_data['phone'] = $_POST['Field117'];
        }
        
        //email
        if(!empty($_POST['Field11'])){
            $wufoo_data['email'] = $_POST['Field11'];
        }
        
        //company name
        if(!empty($_POST['Field121'])){
            $wufoo_data['company'] = $_POST['Field121'];
        }
        
        //website
        if(!empty($_POST['Field10'])){
            $wufoo_data['URL'] = $_POST['Field10'];
        }
        
        /* START SERVICES */
        $wufoo_data['services'] = '';
        
        //seo
        if(!empty($_POST['Field12'])){
            $wufoo_data['services'] .= ', ' . $_POST['Field12'];
        }
        
        //local
        if(!empty($_POST['Field13'])){
            $wufoo_data['services'] .= ', ' . $_POST['Field13'];
        }
        
        //website design/dev
        if(!empty($_POST['Field14'])){
            $wufoo_data['services'] .= ', ' . $_POST['Field14'];
        }
        
        //social media
        if(!empty($_POST['Field15'])){
            $wufoo_data['services'] .= ', ' . $_POST['Field15'];
        }
        
        //rep management
        if(!empty($_POST['Field16'])){
            $wufoo_data['services'] .= ', ' . $_POST['Field16'];
        }
        
        //ppc
        if(!empty($_POST['Field17'])){
            $wufoo_data['services'] .= ', ' . $_POST['Field17'];
        }
        
        /* END SERVICES */
        
        //current seo company
        if(!empty($_POST['Field113'])){
            $wufoo_data['current_company'] = $_POST['Field113'];
        }
        
        //budget
         if(!empty($_POST['Field114'])){
            $wufoo_data['budget'] = $_POST['Field114']; 
         }
        
        //goals
        if(!empty($_POST['Field112'])){
            $wufoo_data['goals'] = $_POST['Field112'];
        }
        
        //source
        $wufoo_data['lead_source'] = 'LEAD SOURCE GOES HERE';
        
        /*
        CUSTOM FIELD IDENTIFIERS
        services needed: 00NG00000064Dxh
        current company: 00NG00000064Dxm
        monthly seo budget: 00NG00000064Dxr
        goals: 00NG00000064Dxw
        */
        
        $url = 'https://www.salesforce.com/servlet/servlet.WebToLead?encoding=UTF-8';
        $oid = 'SALESFORCE OID GOES HERE';
        
        $params =
            'first_name=' . $wufoo_data['first_name'] .
            '&last_name=' . $wufoo_data['last_name'] .
            '&company=' . $wufoo_data['company'] .
            '&email=' . $wufoo_data['email'] .
            '&phone=' . $wufoo_data['phone'] .
            '&description=' . $wufoo_data['description'] .
            '&lead_source=' . $wufoo_data['lead_source'] . 
            '&00NG00000064Dxh=' . $wufoo_data['services'] . // CUSTOM FIELD
            '&00NG00000064Dxm=' . $wufoo_data['current_company'] . // CUSTOM FIELD
            '&00NG00000064Dxr=' . $wufoo_data['budget'] . // CUSTOM FIELD
            '&00NG00000064Dxw=' . $wufoo_data['goals'] . // CUSTOM FIELD
            '&URL=' . $wufoo_data['URL'] .
            '&oid=' . $oid;
         
        $curl = curl_init($url);
        curl_setopt($curl, CURLOPT_POST, true);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $params);
        
        $json_response = curl_exec($curl);
        
        $status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
        
        if ($status != 200) {
            die("Error - call failed with status " . $status . " response " . $json_response . " curl error " . curl_error($curl) . " curl error number " . curl_errno($curl));
        }
        
        curl_close($curl);
        
        return json_decode($json_response, true);
    } //end post_lead function
    
    $connect = post_lead();

} //end handshake if
?>