Преобразование зарезервированных символов XML в сущности
function xml_convert($str, $protect_all = FALSE)
{
$temp = '__TEMP_AMPERSANDS__';
// Replace entities to temporary markers so that
// ampersands won't get messed up
$str = preg_replace("/&#(\d+);/", "$temp\\1;", $str);
if ($protect_all === TRUE)
{
$str = preg_replace("/&(\w+);/", "$temp\\1;", $str);
}
$str = str_replace(array("&","<",">","\"", "'", "-"),
array("&", "<", ">", """, "'", "-"),
$str);
// Decode the temp markers back to entities
$str = preg_replace("/$temp(\d+);/","&#\\1;",$str);
if ($protect_all === TRUE)
{
$str = preg_replace("/$temp(\w+);/","&\\1;", $str);
}
return $str;
}