What potential pitfalls should be considered when using get_headers in PHP?

When using get_headers in PHP, potential pitfalls to consider include the fact that it may return false if the server does not respond, it may not work with some URL schemes, and it may not follow redirects by default. To handle these issues, you can check for a false return value, use a different method to fetch headers, or set the 'follow_location' option to true when using get_headers. 

$url = 'https://example.com';
$headers = @get_headers($url, 1);

if ($headers === false) {
    echo "Failed to retrieve headers.";
} else {
    // Headers retrieved successfully
    print_r($headers);
}

Keywords

get_headers PHP HTTP error handling response codes

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