extract() optimization

This patch should safely remove what appears to be unnecessary strlen
() calls for php_valid_var_name() used by extract().

diff --git a/ext/standard/array.c b/ext/standard/array.c
index fad4bf2..401957f 100644
--- a/ext/standard/array.c
+++ b/ext/standard/array.c
@@ -1270,15 +1270,13 @@ PHP_FUNCTION(array_search)
/* }}} */
-static int php_valid_var_name(char *var_name)
+static int php_valid_var_name(char *var_name, uint len)
{

•   int len, i;
  

•   int i;
  
     if (!var_name)
             return 0;
  

•   len = strlen(var_name);
  

•    if (!isalpha((int)((unsigned char *)var_name)[0]) && var_name 
  

[0] != '_')
return 0;

@@ -1409,7 +1407,7 @@ PHP_FUNCTION(extract)
case EXTR_PREFIX_INVALID:
if (final_name.len == 0) {

•                                   if (!php_valid_var_name 
  

(var_name)) {

•                                   if (!php_valid_var_name 
  

(var_name, var_name_len)) {
smart_str_appendl
(&final_name, Z_STRVAL_PP(prefix), Z_STRLEN_PP(prefix));
smart_str_appendc
(&final_name, '_');
smart_str_appendl
(&final_name, var_name, var_name_len);
@@ -1426,7 +1424,7 @@ PHP_FUNCTION(extract)
if (final_name.len) {
smart_str_0(&final_name);

•                   if (php_valid_var_name(final_name.c)) {
  

•                   if (php_valid_var_name(final_name.c,  
  

final_name.len)) {
if (extract_refs) {
zval **orig_var;

-Brian Shire
shire@facebook.com
shire@php.net
aim: int80h