preg_replace() optimization

Author: dstogov

ext/fileinfo/libmagic/funcs.c

@@ -471,7 +471,7 @@ file_replace(struct magic_set *ms, const char *pat, const char *rep)
 	int opts = 0;
 	pcre_cache_entry *pce;
 	zend_string *res;
-	zval repl;
+	zend_string *repl;
 	int  rep_cnt = 0;
 
 	(void)setlocale(LC_CTYPE, "C");
@@ -485,10 +485,10 @@ file_replace(struct magic_set *ms, const char *pat, const char *rep)
 	}
 	zval_ptr_dtor(&patt);
 
-	ZVAL_STRING(&repl, rep);
-	res = php_pcre_replace_impl(pce, NULL, ms->o.buf, strlen(ms->o.buf), &repl, 0, -1, &rep_cnt);
+	repl = zend_string_init(rep, strlen(rep), 0);
+	res = php_pcre_replace_impl(pce, NULL, ms->o.buf, strlen(ms->o.buf), repl, -1, &rep_cnt);
 
-	zval_ptr_dtor(&repl);
+	zend_string_release(repl);
 	if (NULL == res) {
 		rep_cnt = -1;
 		goto out;