Fixed bug #47546 (Default value for limit parameter in explode is 0, not -1)

ext/standard/string.c

@@ -1311,7 +1311,7 @@ PHP_FUNCTION(explode)
 		} else {
 			add_index_stringl(return_value, 0, (char *)str, str_len, 1);
 		}
-	} else if (limit < 0 && argc == 3) {
+	} else if (limit < -1 && argc == 3) {
 		if ( str_type == IS_UNICODE ) {
 			php_u_explode_negative_limit((UChar *)delim, delim_len, (UChar *)str, str_len, return_value, limit);
 		} else {

ext/standard/tests/strings/bug47546.phpt

@@ -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
+)