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// Calculate the checksum
$md5 = false;
if (stristr($type, 'text')) {
// This is a text-type file. We need to remove linefeeds before
// calculating a checksum, to account for possible FTP conversions
// that are inconvenient, but still valid. But we don't want to
// allow newlines anywhere; just different *kinds* of newlines.
$newlines = array("#\r\n#", "#\r#", "#\n#");
$file = file_get_contents($filename);
(1262) $file = preg_replace($newlines, ' ', $file);
$md5 = md5($file);
} else {
// Just get its md5sum
$md5 = md5_file($filename);
}