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<?php
/**
* Merge 3 strings into one
*
* @phpstub
* @param string $old_data
* @param string $new_data1
* @param string $new_data2
* @param string $error
* @return mixed Returns the merged string, false if an internal error happened,
* or true if merged string is empty.
*/
function xdiff_string_merge3($old_data, $new_data1, $new_data2, &$error = NULL)
{
}