+/**
+ * Wrapper for PHP's htmlspecialchars() that
+ * attempts to add the correct character encoding
+ *
+ * @param string $string The string to be converted
+ * @param int $flags A bitmask that controls the behavior of htmlspecialchars()
+ * (See http://php.net/manual/function.htmlspecialchars.php )
+ * (OPTIONAL; default ENT_COMPAT, ENT_COMPAT | ENT_SUBSTITUTE for PHP >=5.4)
+ * @param string $encoding The character encoding to use in the conversion
+ * (OPTIONAL; default automatic detection)
+ * @param boolean $double_encode Whether or not to convert entities that are
+ * already in the string (only supported in
+ * PHP 5.2.3+) (OPTIONAL; default TRUE)
+ *
+ * @return string The converted text
+ *
+ */
+function sm_encode_html_special_chars($string, $flags=ENT_COMPAT,
+ $encoding=NULL, $double_encode=TRUE)
+{
+ if (!$encoding)
+ {
+ global $default_charset;
+ if ($default_charset == 'iso-2022-jp')
+ $default_charset = 'EUC-JP';
+ $encoding = $default_charset;
+ }
+
+ if (check_php_version(5, 2, 3)) {
+ // Replace invalid characters with a symbol instead of returning
+ // empty string for the entire to be encoded string.
+ if (check_php_version(5, 4, 0) && $flags == ENT_COMPAT) {
+ $flags = $flags | ENT_SUBSTITUTE;
+ }
+ return htmlspecialchars($string, $flags, $encoding, $double_encode);
+ }
+
+ return htmlspecialchars($string, $flags, $encoding);
+}
+