post - How can I forward PayPal IPN to another PHP file? -

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we updating our system , old ipns need processed differently. however, cannot change original ipn send-to addresses. have "bounce" ipn message off of old_ipnprocessor.php , forward new_ipnprocessor.php. cannot modify old_ipnprocessor.php technical reasons go beyond scope of question.

from have read, have use curl accomplish this. have seen code this, unsure how it's implemented. instance, $post var in code below (from https://stackoverflow.com/a/6213693/1390395) raw json straight paypal. have in php array work?

function forwardipn($post){         $url = "new_ipnprocessor.php";          // $post ipn message paypal         $content = $post;          $curl = curl_init($url);         curl_setopt($curl, curlopt_header, false);         curl_setopt($curl, curlopt_returntransfer, true);         curl_setopt($curl, curlopt_httpheader,                 array("content-type: application/json"));         curl_setopt($curl, curlopt_post, true);         curl_setopt($curl, curlopt_postfields, $content);          $json_response = curl_exec($curl);          $status = curl_getinfo($curl, curlinfo_http_code);          if ( $status != 201 ) {             die("error: call url $url failed status $status, response $json_response, curl_error " . curl_error($curl) . ", curl_errno " . curl_errno($curl));         }           curl_close($curl);          $response = json_decode($json_response, true);       }


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