PHP sample.

php/reverse_whois_api_v2.php

@@ -0,0 +1,53 @@
+<?php
+
+$apiKey = 'Your reverse whois api key';
+
+$termsAdvanced = array(
+    'advancedSearchTerms' => array(
+        array(
+            'field' => 'RegistrantContact.Name',
+            'term' => 'Test'
+        )
+    ),
+    'mode' => 'purchase',
+    'apiKey' => $apiKey,
+    'sinceDate' => '2018-07-15'
+);
+
+$termsBasic = array(
+    'basicSearchTerms' => array(
+        'include' => array(
+            'test'
+        ),
+        'exclude' => array(
+            'whois',
+            'api'
+        )
+    ),
+    'mode' => 'purchase',
+    'apiKey' => $apiKey,
+    'sinceDate' => '2018-07-15'
+);
+
+function reverse_whois_api(array $data=array())
+{
+    $header ="Content-Type: application/json\r\nAccept: application/json\r\n";
+
+    $url = 'https://reverse-whois-api.whoisxmlapi.com/api/v2';
+
+    $options = array(
+        'http' => array(
+            'method' => 'POST',
+            'header' => $header,
+            'content' => json_encode($data)
+        )
+    );
+
+    return file_get_contents($url, false, stream_context_create($options));
+}
+
+print('Basic:' . PHP_EOL);
+print_r(json_decode(reverse_whois_api($termsBasic)));
+
+print('Advanced:' . PHP_EOL);
+print_r(json_decode(reverse_whois_api($termsAdvanced)));