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<?php
namespace Box\Spout\Common\Escaper;
use Box\Spout\Common\Singleton;
/**
* Class ODS
* Provides functions to escape and unescape data for ODS files
*
* @package Box\Spout\Common\Escaper
*/
class ODS implements EscaperInterface
{
use Singleton;
/**
* Escapes the given string to make it compatible with XLSX
*
* @param string $string The string to escape
* @return string The escaped string
*/
public function escape($string)
{
if (defined('ENT_DISALLOWED')) {
// 'ENT_DISALLOWED' ensures that invalid characters in the given document type are replaced.
// Otherwise control characters like a vertical tab "\v" will make the XML document unreadable by the XML processor
// @link https://github.com/box/spout/issues/329
$replacedString = htmlspecialchars($string, ENT_NOQUOTES | ENT_DISALLOWED);
} else {
// We are on hhvm or any other engine that does not support ENT_DISALLOWED.
//
// @NOTE: Using ENT_NOQUOTES as only XML entities ('<', '>', '&') need to be encoded.
// Single and double quotes can be left as is.
$escapedString = htmlspecialchars($string, ENT_NOQUOTES);
// control characters values are from 0 to 1F (hex values) in the ASCII table
// some characters should not be escaped though: "\t", "\r" and "\n".
$regexPattern = '[\x00-\x08' .
// skipping "\t" (0x9) and "\n" (0xA)
'\x0B-\x0C' .
// skipping "\r" (0xD)
'\x0E-\x1F]';
$replacedString = preg_replace("/$regexPattern/", '�', $escapedString);
}
return $replacedString;
}
/**
* Unescapes the given string to make it compatible with XLSX
*
* @param string $string The string to unescape
* @return string The unescaped string
*/
public function unescape($string)
{
// ==============
// = WARNING =
// ==============
// It is assumed that the given string has already had its XML entities decoded.
// This is true if the string is coming from a DOMNode (as DOMNode already decode XML entities on creation).
// Therefore there is no need to call "htmlspecialchars_decode()".
return $string;
}
}