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util.php
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<?php
function to_file($input)
{
$input = str_replace( ' ', '_', $input);
$input = str_replace('__', '_', $input);
$input = str_replace(',_', ',', $input);
$input = str_replace('_,', ',', $input);
$input = str_replace('-_', '-', $input);
$input = str_replace('_-', '-', $input);
$input = str_replace( ',', '__', $input);
return $input;
}
function book_output($input)
{
$input = str_replace('__', ',', $input);
$input = str_replace( '_', ' ', $input);
$input = str_replace( ',', ', ', $input);
$input = str_replace( '-', ' - ', $input);
list($author, $title) = explode('-', $input, 2);
$author = trim($author);
$title = trim($title);
if (!$title) {
$title = $author;
$author = '';
}
return '<span class="title">' . htmlspecialchars($title) . '</span>' .
'<span class="author">' . htmlspecialchars($author) . '</author>';
}