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Hi,

This tutorial shows you php curl request with certificate. if you have question about php curl request with pem certificate then i will give simple example with solution. Here you will learn php curl request pass pem file. you will learn how to send a curl request with pem certificate in php. follow bellow step for php send curl request with pem file certificate.

In this example i will give you example of how to send curl request with pem file certificate authentication request. you can pass pem file certificate as like bellow:

curl_setopt($ch, CURLOPT_SSLCERT, "mycert.pem");
curl_setopt($ch, CURLOPT_SSLCERTTYPE, "PEM");

Example:

<?php
  
    $ch = curl_init();
  
    curl_setopt($ch, CURLOPT_URL, 'https://example.com/token');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, "grant_type=client_cert");
  
    curl_setopt($ch, CURLOPT_SSLCERT, "mycert.pem");
    curl_setopt($ch, CURLOPT_SSLCERTTYPE, "PEM");
  
    $headers = [];
    $headers[] = 'Content-Type: application/x-www-form-urlencoded';
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
  
    $result = curl_exec($ch);
    if (curl_errno($ch)) {
        return false;
    }
    curl_close($ch);
  
    $result = json_decode($result);
      
    print_r($result);
  
?>

i hope it can help you...