What are the advantages and disadvantages of using get_headers() to determine the size of an image file in PHP?

One advantage of using get_headers() to determine the size of an image file in PHP is that it can provide the file size without needing to download the entire file. This can be useful for checking the size of remote image files. However, a disadvantage is that it may not always return accurate file sizes, especially for dynamically generated images or images with incorrect headers. 

<?php
$url = 'https://example.com/image.jpg';
$headers = get_headers($url, 1);
$file_size = $headers['Content-Length'];

echo "File size: " . $file_size . " bytes";
?>

Keywords

get_headers image file size advantages disadvantages

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