What are some common reasons for receiving a 404 Forbidden error when using a proxy server in PHP?

The 404 Forbidden error when using a proxy server in PHP commonly occurs due to incorrect proxy settings or restrictions set by the proxy server. To resolve this issue, ensure that the proxy server settings are correctly configured and that the server allows access to the requested resource. 

// Example of setting proxy server in PHP
$proxy = 'proxy.example.com:8080';
$proxy_auth = 'username:password';

$context = stream_context_create([
    'http' => [
        'proxy' => $proxy,
        'request_fulluri' => true,
        'header' => "Proxy-Authorization: Basic " . base64_encode($proxy_auth)
    ]
]);

$response = file_get_contents('https://example.com', false, $context);
echo $response;

Keywords

proxy server 404 Forbidden error PHP headers authentication

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