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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Javascript escaping functions.
*
* @author Michal Čihař <michal@cihar.com>
* @package phpMyAdmin
*
* @version $Id: js_escape.lib.php 11604 2008-09-22 14:09:44Z lem9 $
*/
/**
* Format a string so it can be a string inside JavaScript code inside an
* eventhandler (onclick, onchange, on..., ).
* This function is used to displays a javascript confirmation box for
* "DROP/DELETE/ALTER" queries.
*
* @uses PMA_escapeJsString()
* @uses PMA_backquote()
* @uses is_string()
* @uses htmlspecialchars()
* @uses str_replace()
* @param string $a_string the string to format
* @param boolean $add_backquotes whether to add backquotes to the string or not
*
* @return string the formatted string
*
* @access public
*/
function PMA_jsFormat($a_string = '', $add_backquotes = true)
{
if (is_string($a_string)) {
$a_string = htmlspecialchars($a_string);
$a_string = PMA_escapeJsString($a_string);
/**
* @todo what is this good for?
*/
$a_string = str_replace('#', '\\#', $a_string);
}
return (($add_backquotes) ? PMA_backquote($a_string) : $a_string);
} // end of the 'PMA_jsFormat()' function
/**
* escapes a string to be inserted as string a JavaScript block
* enclosed by <![CDATA[ ... ]]>
* this requires only to escape ' with \' and end of script block
*
* We also remove NUL byte as some browsers (namely MSIE) ignore it and
* inserting it anywhere inside </script would allow to bypass this check.
*
* @uses strtr()
* @uses preg_replace()
* @param string $string the string to be escaped
* @return string the escaped string
*/
function PMA_escapeJsString($string)
{
return preg_replace('@</script@i', '</\' + \'script',
strtr($string, array(
"\000" => '',
'\\' => '\\\\',
'\'' => '\\\'',
"\n" => '\n',
"\r" => '\r')));
}
?>
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