在PHP中创建新的DateTime对象不起作用

Question

我有以下一段代码。我录的输出，以及：

function convertGeneralAvailabilityTime($date,$from_timezone,$from_timebegin, $from_time$ 
{ 
echo "$date,$from_timezone,$from_timebegin, $from_timeend, $to_timezone"; 
// 2010-09-19,America/New_York,07:45:00, 08:00:00, America/Los_Angeles 

$tz1 = new DateTimezone($from_timezone); 

$datetime1 = new DateTime("$date $from_timebegin", $tz1); 
$datetime2 = new DateTime("$date $from_timeend", $tz1); 

echo "$date $from_timebegin"; 
// 2010-09-19 07:45:00 
echo "$date $from_timeend"; 
// 2010-09-19 08:00:00 
var_export($tz1); 
//DateTimeZone::__set_state(array(
//)) 
var_export($datetime1); 
//DateTime::__set_state(array(
//)) 

什么是错我的PHP的日期时间（）功能可按 - 但我不能参透！我在这台服务器上使用PHP 5.2.14。

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编辑1：对不起，曲解一些PHP输出 - 纠正它上面

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编辑2：我有这给了恰好输出如下下面的测试文件

<?php 
$date = '2010-09-19'; 
$from_timezone = 'America/New_York'; 
$from_timebegin = '07:45:00'; 
$from_timeend = '08:00:00'; 
$to_timezone = 'America/Los_Angeles'; // Trimmed 2010-09-19 07:45:002010-09-19 

$tz1 = new DateTimezone($from_timezone); 

$datetime1 = new DateTime("$date $from_timebegin", $tz1); 
$datetime2 = new DateTime("$date $from_timeend", $tz1); 

echo "$date $from_timebegin".PHP_EOL; 
echo "$date $from_timeend".PHP_EOL; 
var_dump($tz1); 
var_dump($datetime1); 

?> 

输出：

jailshell-3.2$ php dttest.php 
2010-09-19 07:45:00 
2010-09-19 08:00:00 
object(DateTimeZone)#1 (0) { 
} 
object(DateTime)#2 (0) { 
} 

---

编辑3 - 如果有帮助，我的phpinfo显示这个问题，以及

date 
date/time support enabled 
"Olson" Timezone Database Version 2010.12 
Timezone Database external 
Default timezone America/Chicago 

Answer 1

我简化跑你的代码。这是输出：

php > $date = '2010-09-19'; 
php > $from_timezone = 'America/New_York'; 
php > $from_timebegin = '07:45:00'; 
php > $from_timeend = '08:00:00'; 
php > $to_timezone = 'America/Los_Angeles'; // Trimmed 2010-09-19 07:45:002010-09-19 08:00:00 
php > 
php > $tz1 = new DateTimezone($from_timezone); 
php > 
php > $datetime1 = new DateTime("$date $from_timebegin", $tz1); 
php > $datetime2 = new DateTime("$date $from_timeend", $tz1); 
php > 
php > echo "$date $from_timebegin".PHP_EOL; 
2010-09-19 07:45:00 
php > echo "$date $from_timeend".PHP_EOL; 
2010-09-19 08:00:00 
php > var_dump($tz1); 
object(DateTimeZone)#1 (0) { 
} 
php > var_dump($datetime1); 
object(DateTime)#2 (3) { 
    ["date"]=> 
    string(19) "2010-09-19 07:45:00" 
    ["timezone_type"]=> 
    int(3) 
    ["timezone"]=> 
    string(16) "America/New_York" 
} 

我没有看到问题。

你在顶部回声包含（后时区）

echo "$date, 
     $from_timezone, 
     $from_timebegin, 
     $from_timeend, 
     $to_timezone" 
; 

// 2010-09-19, 
// America/New_York, 
// 07:45:00, 
// 08:00:00, 
// America/Los_Angeles2010-09-19 07:45:002010-09-19 08:00:00 

什么是在结束所有多余的东西到底垃圾？

Answer 2

$datetime1 = new DateTime($date $from_timebegin, $tz1); 
$datetime2 = new DateTime($date $from_timeend, $tz1); 

echo $date $from_timebegin; 

echo $date $from_timeend; 

Answer 3

在创建DateTime对象之前声明您的默认时区，例如。

date_default_timezone_set('America/New_York'); 
$tz1 = new DateTimezone($from_timezone); 
$datetime1 = new DateTime("$date $from_timebegin", $tz1); 
$datetime2 = new DateTime("$date $from_timeend", $tz1); 

或者宣布它与date.timezone =“美国/纽约”你的php.ini文件