How can one troubleshoot issues with get_headers() function not returning expected results on a server, even though it works locally?

The issue with get_headers() function not returning expected results on a server could be due to server configurations or network restrictions. To troubleshoot this, check if the server allows outgoing connections, ensure the URL being passed to get_headers() is accessible from the server, and verify if there are any firewall rules blocking the request. 

// Example code snippet to troubleshoot get_headers() function issue
$url = 'https://www.example.com';
$headers = @get_headers($url);

if($headers){
    foreach($headers as $header){
        echo $header . "<br>";
    }
} else {
    echo "Failed to retrieve headers for the URL.";
}

Keywords

get_headers PHP server network troubleshooting

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