how to get values from big commerce using php api - bigcommerce

Question

<?php
/**
*Class to instantiate different api connections
*
* #author Adam Bilsing <adambilsing#gmail.com>
*/
class connection
{
/**
*public and private variables
*
* #var string stores data for the class
*/
static public $path;
static private $user;
static private $token;
static private $headers;
/**
* Sets $_path, $_user, $_token, $_headers upon class instantiation
*
* #param $user, $path, $token required for the class
* #return void
*/
public function __construct($user, $path, $token) {
$path = explode('/api/v2/', $path);
$this->_path = $path[0];
$this->_user = $user;
$this->_token = $token;
$encodedToken = base64_encode($this->_user.":".$this->_token);
$authHeaderString = 'Authorization: Basic ' . $encodedToken;
$this->_headers = array($authHeaderString, 'Accept: application/json','Content-Type: application/json');
}
public static function http_parse_headers( $header )
{
$retVal = array();
$fields = explode("\r\n", preg_replace('/\x0D\x0A[\x09\x20]+/', ' ', $header));
foreach( $fields as $field ) {
if( preg_match('/([^:]+): (.+)/m', $field, $match) ) {
$match[1] = preg_replace('/(?<=^|[\x09\x20\x2D])./e', 'strtoupper("\0")', strtolower(trim($match[1])));
if( isset($retVal[$match[1]]) ) {
$retVal[$match[1]] = array($retVal[$match[1]], $match[2]);
} else {
$retVal[$match[1]] = trim($match[2]);
}
}
}
if ($retVal['X-Bc-Apilimit-Remaining'] <= 100) {
sleep(300);
}
}
public function error($body, $url, $json, $type) {
global $error;
if (isset($json)) {
$results = json_decode($body, true);
$results = $results[0];
$results['type'] = $type;
$results['url'] = $url;
$results['payload'] = $json;
$error = $results;
} else {
$results = json_decode($body, true);
$results = $results[0];
$results['type'] = $type;
$results['url'] = $url;
$error = $results;
}
}
/**
* Performs a get request to the instantiated class
*
* Accepts the resource to perform the request on
*
* #param $resource string $resource a string to perform get on
* #return results or var_dump error
*/
public function get($resource) {
$url = $this->_path . '/api/v2' . $resource;
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_HTTPHEADER, $this->_headers);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_VERBOSE, 1);
curl_setopt($curl, CURLOPT_HEADER, 1);
curl_setopt($curl, CURLOPT_HTTPGET, 1);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
$response = curl_exec($curl);
$http_status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
$header_size = curl_getinfo($curl, CURLINFO_HEADER_SIZE);
$headers = substr($response, 0, $header_size);
$body = substr($response, $header_size);
self::http_parse_headers($headers);
curl_close ($curl);
if ($http_status == 200) {
$results = json_decode($body, true);
return $results;
} else {
$this->error($body, $url, null, 'GET');
}
}
/**
* Performs a put request to the instantiated class
*
* Accepts the resource to perform the request on, and fields to be sent
*
* #param string $resource a string to perform get on
* #param array $fields an array to be sent in the request
* #return results or var_dump error
*/
public function put($resource, $fields) {
$url = $this->_path . '/api/v2' . $resource;
$json = json_encode($fields);
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_HTTPHEADER, $this->_headers);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_VERBOSE, 1);
curl_setopt($curl, CURLOPT_HEADER, 1);
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "PUT");
curl_setopt($curl, CURLOPT_POSTFIELDS, $json);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
$response = curl_exec($curl);
$http_status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
$header_size = curl_getinfo($curl, CURLINFO_HEADER_SIZE);
$headers = substr($response, 0, $header_size);
$body = substr($response, $header_size);
self::http_parse_headers($headers);
curl_close($curl);
if ($http_status == 200) {
$results = json_decode($body, true);
return $results;
} else {
$this->error($body, $url, $json, 'PUT');
}
}
/**
* Performs a post request to the instantiated class
*
* Accepts the resource to perform the request on, and fields to be sent
*
* #param string $resource a string to perform get on
* #param array $fields an array to be sent in the request
* #return results or var_dump error
*/
public function post($resource, $fields) {
global $error;
$url = $this->_path . '/api/v2' . $resource;
$json = json_encode($fields);
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_HTTPHEADER, $this->_headers);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_VERBOSE, 1);
curl_setopt($curl, CURLOPT_HEADER, 1);
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($curl, CURLOPT_POSTFIELDS, $json);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
$response = curl_exec ($curl);
$http_status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
$header_size = curl_getinfo($curl, CURLINFO_HEADER_SIZE);
$headers = substr($response, 0, $header_size);
$body = substr($response, $header_size);
self::http_parse_headers($headers);
curl_close ($curl);
if ($http_status == 201) {
$results = json_decode($body, true);
return $results;
} else {
$this->error($body, $url, $json, 'POST');
}
}
/**
* Performs a delete request to the instantiated class
*
* Accepts the resource to perform the request on
*
* #param string $resource a string to perform get on
* #return proper response or var_dump error
*/
public function delete($resource) {
$url = $this->_path . '/api/v2' . $resource;
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_HTTPHEADER, $this->_headers);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_VERBOSE, 1);
curl_setopt($curl, CURLOPT_HEADER, 1);
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "DELETE");
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
$response = curl_exec($curl);
$http_status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
$header_size = curl_getinfo($curl, CURLINFO_HEADER_SIZE);
$headers = substr($response, 0, $header_size);
$body = substr($response, $header_size);
self::http_parse_headers($headers);
curl_close ($curl);
if ($http_status == 204) {
return $http_status . ' DELETED';
} else {
$this->error($body, $url, null, 'DELETE');
}
}
}
?>
get('RESOURCE');
$store->delete('RESOURCE');
$store->post('RESOURCE', $fields);
$store->put('RESOURCE', $fields);
?>
If i run these code i m getting error like this
( ! ) Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in D:\wamp\www\Bigcommerce\connection.php on line 39
Notice: Undefined variable: fields in D:\wamp\www\Bigcommerce\singlepage.php on line 5
any one pls help me to solve this problem