Index: ext/standard/string.c
===================================================================
RCS file: /repository/php-src/ext/standard/string.c,v
retrieving revision 1.445.2.14.2.81
retrieving revision 1.445.2.14.2.82
diff -u -3 -p -r1.445.2.14.2.81 -r1.445.2.14.2.82
--- ext/standard/string.c	14 Feb 2009 07:00:24 -0000	1.445.2.14.2.81
+++ ext/standard/string.c	3 Mar 2009 11:50:32 -0000	1.445.2.14.2.82
@@ -1042,7 +1042,7 @@ PHP_FUNCTION(explode)
 
 	if (limit == 0 || limit == 1) {
 		add_index_stringl(return_value, 0, Z_STRVAL_PP(str), Z_STRLEN_PP(str), 1);
-	} else if (limit < 0 && argc == 3) {
+	} else if (limit < -1 && argc == 3) {
 		php_explode_negative_limit(*delim, *str, return_value, limit);
 	} else {
 		php_explode(*delim, *str, return_value, limit);
--- /dev/null	2009-03-17 12:44:35.543007618 +0100
+++ ext/standard/tests/strings/bug47546.phpt	2009-03-03 12:50:32.000000000 +0100
@@ -0,0 +1,24 @@
+--TEST--
+Bug #47546 (Default value for limit parameter in explode is 0, not -1)
+--FILE--
+<?php
+$str = 'one|two|three|four';
+
+print_r(explode('|', $str));
+print_r(explode('|', $str, -1));
+?>
+--EXPECT--
+Array
+(
+    [0] => one
+    [1] => two
+    [2] => three
+    [3] => four
+)
+Array
+(
+    [0] => one
+    [1] => two
+    [2] => three
+    [3] => four
+)