PHPAPI char *php_str_to_str(char *haystack, int length, char *needle,
int needle_len, char *str, int str_len, int *_new_length);
PHPAPI char *php_trim(char *c, int len, char *what, int what_len, zend_uchar str_type, zval *return_value, int mode TSRMLS_DC);
+PHPAPI int32_t php_u_strip_tags(UChar *rbuf, int32_t len, int *stateptr, UChar *allow, int32_t allow_len TSRMLS_DC);
PHPAPI size_t php_strip_tags(char *rbuf, int len, int *state, char *allow, int allow_len);
PHPAPI int php_char_to_str_ex(char *str, uint len, char from, char *to, int to_len, pval *result, int case_sensitivity, int *replace_count);
PHPAPI int php_char_to_str(char *str, uint len, char from, char *to, int to_len, pval *result);