How can the size of an open image be determined in PHP for download headers?

To determine the size of an open image in PHP for download headers, you can use the `filesize()` function to get the size of the image file in bytes. This information can then be used to set the appropriate headers for downloading the image with the correct file size. 

// Open the image file
$image = fopen('image.jpg', 'r');

// Get the size of the image file
$filesize = filesize('image.jpg');

// Set the appropriate headers for downloading the image with the correct file size
header('Content-Type: image/jpeg');
header('Content-Length: ' . $filesize);

// Output the image content
fpassthru($image);

// Close the image file
fclose($image);

Keywords

PHP image size download headers getimagesize file_get_contents

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