What potential issues can arise when using PHP cURL to make AJAX post requests to external websites?

One potential issue when using PHP cURL to make AJAX post requests to external websites is that the request may be blocked due to cross-origin resource sharing (CORS) policies implemented by the external website. To solve this issue, you can set the appropriate headers in the cURL request to mimic a browser request, including the Origin header. 

$ch = curl_init();
$url = 'https://example.com/api/endpoint';

$headers = [
    'Content-Type: application/json',
    'Origin: https://yourwebsite.com'
];

curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);

if($response === false){
    echo 'Curl error: ' . curl_error($ch);
}

curl_close($ch);

Keywords

cURL AJAX post requests external websites security vulnerabilities

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