What potential issues can arise when trying to interpret file sizes in PHP?

When trying to interpret file sizes in PHP, potential issues can arise due to differences in how file sizes are represented (e.g., bytes, kilobytes, megabytes). To accurately interpret file sizes, it is important to convert them to a consistent unit of measurement, such as bytes or megabytes, before performing any calculations or comparisons. 

function convertFileSize($size, $unit = "bytes") {
    switch ($unit) {
        case "bytes":
            return $size;
        case "KB":
            return $size * 1024;
        case "MB":
            return $size * 1024 * 1024;
        case "GB":
            return $size * 1024 * 1024 * 1024;
        default:
            return $size;
    }
}

$fileSize = "10 MB";
list($size, $unit) = sscanf($fileSize, "%f %s");
$sizeInBytes = convertFileSize($size, $unit);
echo "File size in bytes: " . $sizeInBytes;

Keywords

file sizes PHP interpretation data type memory limit

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