Index: ext/standard/var_unserializer.re
===================================================================
RCS file: /repository/php-src/ext/standard/var_unserializer.re,v
retrieving revision 1.75
diff -u -r1.75 var_unserializer.re
--- ext/standard/var_unserializer.re	29 Aug 2008 14:59:41 -0000	1.75
+++ ext/standard/var_unserializer.re	17 Mar 2009 21:04:00 -0000
@@ -525,6 +525,26 @@
 }
 
 "i:" iv ";"	{
+#if SIZEOF_LONG == 4
+	int digits = YYCURSOR - start - 3;
+
+	if (start[2] == '-' || start[2] == '+') {
+		digits--;
+	}
+
+	/* Use double for large long values that were serialized on a 64-bit system */
+	if (digits >= MAX_LENGTH_OF_LONG - 1) {
+		if (digits == MAX_LENGTH_OF_LONG - 1) {
+			int cmp = strncmp(YYCURSOR - MAX_LENGTH_OF_LONG, long_min_digits, MAX_LENGTH_OF_LONG - 1);
+
+			if (!(cmp < 0 || (cmp == 0 && start[2] == '-'))) {
+				goto use_double;
+			}
+		} else {
+			goto use_double;
+		}
+	}
+#endif
 	*p = YYCURSOR;
 	INIT_PZVAL(*rval);
 	ZVAL_LONG(*rval, parse_iv(start + 2));
@@ -547,6 +567,9 @@
 }
 
 "d:" (iv | nv | nvexp) ";"	{
+#if SIZEOF_LONG == 4
+use_double:
+#endif
 	*p = YYCURSOR;
 	INIT_PZVAL(*rval);
 	ZVAL_DOUBLE(*rval, zend_strtod((const char *)start + 2, NULL));