Its Importance (make curl request):

Sometimes we need make curl request with custom headers. It is generally used to make connection to an api which expect custom headers. SO I am now describing how to make curl request.

Step 01: First you need to initialize your curl request to make curl request.

$curl = curl_init();

Step 02 : Add curl option array generally your request body here. You also set custom header here in CURLOPT_HTTPHEADER key.

curl_setopt_array($curl, array(
CURLOPT_URL => "https://yourrequesturl.com",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => "{   \n\t\"CurrencyCode\":\"949\",   \n\t\"OrderId\":$order_id,   \n\t\"BaseAmount\":$amount,   \n\t\"SuccessUrl\":\".$success_url.\",   \n\t\"FailUrl\":\".$fail_url.\",   \n\t\"PaymentMethodCode\": \"CC\",   \n\t\"Ip\": \".$ip.\"\n}",

CURLOPT_HTTPHEADER => array(
"AppId: some app id",
"AppSecret: some app secret",
"Content-Type: application/json"
),
));

Step 03: Then execute curl request.

$response = curl_exec($curl);
$err = curl_error($curl);		
curl_close($curl);

You can see the php site documentation

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How to make curl request in a php method with custom headers