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diff --git a/ext/date/tests/date_sunset_variation6.phpt b/ext/date/tests/date_sunset_variation6.phpt
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+--TEST--
+Test date_sunset() function : usage variation - Passing unexpected values to sixth argument gmt_offset.
+--FILE--
+<?php
+/* Prototype : mixed date_sunset(mixed time [, int format [, float latitude [, float longitude [, float zenith [, float gmt_offset]]]]])
+ * Description: Returns time of sunset for a given day and location
+ * Source code: ext/date/php_date.c
+ * Alias to functions:
+ */
+
+echo "*** Testing date_sunset() : usage variation ***\n";
+
+// Initialise function arguments not being substituted (if any)
+date_default_timezone_set("Asia/Calcutta");
+$time = mktime(8, 8, 8, 8, 8, 2008);
+$longitude = 88.21;
+$latitude = 22.34;
+$zenith = 90;
+
+//get an unset variable
+$unset_var = 10;
+unset ($unset_var);
+
+// define some classes
+class classWithToString
+{
+ public function __toString() {
+ return "Class A object";
+ }
+}
+
+class classWithoutToString
+{
+}
+
+// heredoc string
+$heredoc = <<<EOT
+hello world
+EOT;
+
+// add arrays
+$index_array = array (1, 2, 3);
+$assoc_array = array ('one' => 1, 'two' => 2);
+
+//array of values to iterate over
+$inputs = array(
+
+ // int data
+ 'int 0' => 0,
+ 'int 1' => 1,
+ 'int 12345' => 12345,
+ 'int -12345' => -2345,
+
+ // array data
+ 'empty array' => array(),
+ 'int indexed array' => $index_array,
+ 'associative array' => $assoc_array,
+ 'nested arrays' => array('foo', $index_array, $assoc_array),
+
+ // null data
+ 'uppercase NULL' => NULL,
+ 'lowercase null' => null,
+
+ // boolean data
+ 'lowercase true' => true,
+ 'lowercase false' =>false,
+ 'uppercase TRUE' =>TRUE,
+ 'uppercase FALSE' =>FALSE,
+
+ // empty data
+ 'empty string DQ' => "",
+ 'empty string SQ' => '',
+
+ // string data
+ 'string DQ' => "string",
+ 'string SQ' => 'string',
+ 'mixed case string' => "sTrInG",
+ 'heredoc' => $heredoc,
+
+ // object data
+ 'instance of classWithToString' => new classWithToString(),
+ 'instance of classWithoutToString' => new classWithoutToString(),
+
+ // undefined data
+ 'undefined var' => @$undefined_var,
+
+ // unset data
+ 'unset var' => @$unset_var,
+);
+
+// loop through each element of the array for gmt_offset
+
+foreach($inputs as $key =>$value) {
+ echo "\n--$key--\n";
+ var_dump( date_sunset($time, SUNFUNCS_RET_STRING, $latitude, $longitude, $zenith, $value) );
+ var_dump( date_sunset($time, SUNFUNCS_RET_DOUBLE, $latitude, $longitude, $zenith, $value) );
+ var_dump( date_sunset($time, SUNFUNCS_RET_TIMESTAMP, $latitude, $longitude, $zenith, $value) );
+};
+
+?>
+===DONE===
+--EXPECTF--
+*** Testing date_sunset() : usage variation ***
+
+--int 0--
+string(5) "12:40"
+float(12.681%d)
+int(1218199253)
+
+--int 1--
+string(5) "13:40"
+float(13.681%d)
+int(1218199253)
+
+--int 12345--
+string(5) "21:40"
+float(21.681%d)
+int(1218199253)
+
+--int -12345--
+string(5) "19:40"
+float(19.681%d)
+int(1218199253)
+
+--empty array--
+
+Warning: date_sunset() expects parameter 6 to be double, array given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, array given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, array given in %s on line %d
+bool(false)
+
+--int indexed array--
+
+Warning: date_sunset() expects parameter 6 to be double, array given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, array given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, array given in %s on line %d
+bool(false)
+
+--associative array--
+
+Warning: date_sunset() expects parameter 6 to be double, array given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, array given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, array given in %s on line %d
+bool(false)
+
+--nested arrays--
+
+Warning: date_sunset() expects parameter 6 to be double, array given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, array given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, array given in %s on line %d
+bool(false)
+
+--uppercase NULL--
+string(5) "12:40"
+float(12.681%d)
+int(1218199253)
+
+--lowercase null--
+string(5) "12:40"
+float(12.681%d)
+int(1218199253)
+
+--lowercase true--
+string(5) "13:40"
+float(13.681%d)
+int(1218199253)
+
+--lowercase false--
+string(5) "12:40"
+float(12.681%d)
+int(1218199253)
+
+--uppercase TRUE--
+string(5) "13:40"
+float(13.681%d)
+int(1218199253)
+
+--uppercase FALSE--
+string(5) "12:40"
+float(12.681%d)
+int(1218199253)
+
+--empty string DQ--
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+--empty string SQ--
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+--string DQ--
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+--string SQ--
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+--mixed case string--
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+--heredoc--
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, string given in %s on line %d
+bool(false)
+
+--instance of classWithToString--
+
+Warning: date_sunset() expects parameter 6 to be double, object given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, object given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, object given in %s on line %d
+bool(false)
+
+--instance of classWithoutToString--
+
+Warning: date_sunset() expects parameter 6 to be double, object given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, object given in %s on line %d
+bool(false)
+
+Warning: date_sunset() expects parameter 6 to be double, object given in %s on line %d
+bool(false)
+
+--undefined var--
+string(5) "12:40"
+float(12.681%d)
+int(1218199253)
+
+--unset var--
+string(5) "12:40"
+float(12.681%d)
+int(1218199253)
+===DONE===