connect a php $post_data[ with html code

[sbaokay]

hi i have the following code:\[code\]<?php$post_data['firstname'] = '';$post_data['lastname'] = '';$post_data['address'] = '';foreach ( $post_data as $key => $value){$post_items[] = $key . '=' . $value;}$post_string = implode ('&', $post_items);$curl_connection = curl_init('https://example.com/app.php');curl_setopt($curl_connection, CURLOPT_CONNECTTIMEOUT, 30);curl_setopt($curl_connection, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)");curl_setopt($curl_connection, CURLOPT_RETURNTRANSFER, true);curl_setopt($curl_connection, CURLOPT_SSL_VERIFYPEER, false);curl_setopt($curl_connection, CURLOPT_FOLLOWLOCATION, 1);curl_setopt($curl_connection, CURLOPT_POSTFIELDS, $post_string);$result = curl_exec($curl_connection);echo "Result: " . $result . "<br><br>";print_r(curl_getinfo($curl_connection));echo curl_errno($curl_connection) . '-' . curl_error($curl_connection);curl_close($curl_connection);?>\[/code\]how do i connect it to an HTML form so that someone can enter their details in an HTML page and its value will be redirected to this PHP code.please help me about thismy HTML code is:\[code\]<form name="form" method="post" action="my_php.php"><input name="firstname" type="text" ID="firstname" value="http://stackoverflow.com/questions/15590780/first name"><input name="lastname" type="text" ID="lastname" value="http://stackoverflow.com/questions/15590780/last name"><input name="address" type="text" ID="address" value="http://stackoverflow.com/questions/15590780/address"><input type="submit" name="Submit" value="http://stackoverflow.com/questions/15590780/Submit">\[/code\]