What are some common issues that can arise when using PHP to download image files?

One common issue when downloading image files using PHP is that the file may not be downloaded correctly due to incorrect headers being set. To solve this issue, you need to ensure that the correct headers are set before outputting the image data. 

// Set the correct headers before outputting image data
header('Content-Type: image/jpeg');
header('Content-Disposition: attachment; filename="image.jpg"');

// Output the image data
readfile('image.jpg');

Keywords

file_get_contents fopen header content-length memory_limit

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