我了解PHP，但不太了解PHP中的OO。在Joomla工作时，我看到了使用OO和MVC的好处，并喜欢它们的表现方式。但我经常遇到这样的情况:我不知道这是否是OO的一个好选择。下面是一个火车时刻表的示例，作为print_r的JSON字符串输出。
为了在不使用PHP中的OO的情况下从时刻表中提取各种火车站点，我最终使用嵌套的'foreach'来获取火车站的出发和到达时间。
在OO环境中将其作为对象处理可能会更好吗?如果没有嵌套的"foreach"语句，是否可以更容易地获取数据，从而创建更优雅的编程环境?或者切换到OO并不能进一步简化这项任务和PHP代码的可读性?
如果你觉得面向对象是一种方式，如果你能给出一个例子，PHP将如何使用下面的例子来改善环境，这将是最有帮助的。谢谢!
stdClass Object
(
[ITEM] => Array
(
[0] => stdClass Object
(
[ITEM_INDEX] => 0
[SCHED_DEP_DATE] => 10:46:00 06/13/2013
[DESTINATION] => New York
[TRACK] => 2
[LINE] => AMTK
[TRAIN_ID] => A98
[STATUS] => ARRIVED
[BACKCOLOR] => yellow
[FORECOLOR] => black
[SHADOWCOLOR] => yellow
[GPSLATITUDE] => 40.7347
[GPSLONGITUDE] => -74.1644
[GPSTIME] => 6/13/2013 12:06:05 PM
[TRAIN_LINE] => Northeast Corridor Line
[STATION_POSITION] => 1
[LINEABBREVIATION] => AMTK
[INLINEMSG] =>
[STOPS] => stdClass Object
(
[STOP] => stdClass Object
(
[NAME] => New York Penn Station
[TIME] => 6/13/2013 12:26:11 PM
[DROPOFF] => Discharge Only
)
)
)
[1] => stdClass Object
(
[ITEM_INDEX] => 1
[SCHED_DEP_DATE] => 11:57:00 06/13/2013
[DESTINATION] => New York
[TRACK] => 1
[LINE] => AMTK
[TRAIN_ID] => A644
[STATUS] => in 2 Min
[BACKCOLOR] => yellow
[FORECOLOR] => black
[SHADOWCOLOR] => yellow
[GPSLATITUDE] =>
[GPSLONGITUDE] =>
[GPSTIME] => 6/13/2013 12:08:15 PM
[TRAIN_LINE] => Northeast Corridor Line
[STATION_POSITION] => 1
[LINEABBREVIATION] => AMTK
[INLINEMSG] => quiet car is in the rear.........thank you
[STOPS] => stdClass Object
(
[STOP] => stdClass Object
(
[NAME] => New York Penn Station
[TIME] => 6/13/2013 12:28:33 PM
)
)
)
[2] => stdClass Object
(
[ITEM_INDEX] => 2
[SCHED_DEP_DATE] => 12:09:00 06/13/2013
[DESTINATION] => Raritan
[TRACK] => 5
[LINE] => RARV
[TRAIN_ID] => 5423
[STATUS] => ALL ABOARD
[BACKCOLOR] => Orange
[FORECOLOR] => white
[SHADOWCOLOR] => black
[GPSLATITUDE] =>
[GPSLONGITUDE] =>
[GPSTIME] => 6/13/2013 11:23:37 AM
[TRAIN_LINE] => Raritan Valley Line
[STATION_POSITION] => 0
[LINEABBREVIATION] => RARV
[INLINEMSG] =>
[STOPS] => stdClass Object
(
[STOP] => Array
(
[0] => stdClass Object
(
[NAME] => Union
[TIME] => 6/13/2013 12:18:00 PM
)
[1] => stdClass Object
(
[NAME] => Roselle Park
[TIME] => 6/13/2013 12:21:30 PM
)
[2] => stdClass Object
(
[NAME] => Cranford
[TIME] => 6/13/2013 12:26:15 PM
)
[3] => stdClass Object
(
[NAME] => Westfield
[TIME] => 6/13/2013 12:30:15 PM
)
[4] => stdClass Object
(
[NAME] => Fanwood
[TIME] => 6/13/2013 12:34:30 PM
)
[5] => stdClass Object
(
[NAME] => Netherwood
[TIME] => 6/13/2013 12:37:45 PM
)
[6] => stdClass Object
(
[NAME] => Plainfield
[TIME] => 6/13/2013 12:40:45 PM
)
[7] => stdClass Object
(
[NAME] => Dunellen
[TIME] => 6/13/2013 12:45:30 PM
)
[8] => stdClass Object
(
[NAME] => Bound Brook
[TIME] => 6/13/2013 12:52:00 PM
)
[9] => stdClass Object
(
[NAME] => Bridgewater
[TIME] => 6/13/2013 12:54:45 PM
)
[10] => stdClass Object
(
[NAME] => Somerville
[TIME] => 6/13/2013 12:59:30 PM
)
[11] => stdClass Object
(
[NAME] => Raritan
[TIME] => 6/13/2013 1:10:00 PM
)
)
)
)
[3] => stdClass Object
(
[ITEM_INDEX] => 3
[SCHED_DEP_DATE] => 12:12:00 06/13/2013
[DESTINATION] => NY Penn -SEC
[TRACK] => 1
[LINE] => NJCL
[TRAIN_ID] => 3240
[STATUS] =>
[BACKCOLOR] => black
[FORECOLOR] => white
[SHADOWCOLOR] =>
[GPSLATITUDE] =>
[GPSLONGITUDE] =>
[GPSTIME] => 6/13/2013 11:47:35 AM
[TRAIN_LINE] => North Jersey Coast Line
[STATION_POSITION] => 1
[LINEABBREVIATION] => NJCL
[INLINEMSG] =>
[STOPS] => stdClass Object
(
[STOP] => Array
(
[0] => stdClass Object
(
[NAME] => Secaucus Upper Lvl
[TIME] => 6/13/2013 12:19:30 PM
)
[1] => stdClass Object
(
[NAME] => New York Penn Station
[TIME] => 6/13/2013 12:49:00 PM
)
)
)
)
[4] => stdClass Object
... etc.
我试图避免或找到一个更好的方法，使PHP代码看起来不像这样:
foreach ($destinations->ITEM as $key=>$destination) {
echo $destination->DESTINATION . "'t't";
echo $destination->SCHED_DEP_DATE . "'n";
foreach ($destination->STOPS as $key_stops=>$value_stops) {
foreach ($value_stops as $key_stop=>$value_stop) {
echo $value_stop->NAME . "'t";
echo $value_stop->TIME . "'n";
}
}
echo "'n";
}
一些更直接的，也许像这样:$arrival_time = $train_destination($station->$lastrongtop);
所以也许函数被建议是更好的方法。
OOP非常适合将数据与行为联系起来。到目前为止，您所提到的都是需要访问数据。除非你需要这些功能，否则我不会用对象的行为来膨胀你的数据。为了避免代码中的嵌套循环，我会将查询数据的逻辑移到数据库中(假设您有一个);数据库比命令式代码更擅长这类事情，不管它是不是面向对象的。
考虑这样分解你的代码:
function printDestinationStop($stop) {
echo $stop->NAME . "'t";
echo $stop->TIME . "'n";
}
function printDestination($destination) {
echo $destination->DESTINATION . "'t't";
echo $destination->SCHED_DEP_DATE . "'n";
foreach ($destination->STOPS as $stop) {
printDestinationStop($stop);
}
}
function printDestinations($destinations) {
foreach ($destinations->ITEM as $destination) {
printDestination($destination);
echo "'n";
}
}
这也使您可以打印任何特定的停止或目的地，而不必像给定的嵌套循环那样打印所有目的地，因为打印特定元素的代码与主循环是分开的。
更好的方法(尽管在这种情况下可能有些多余)是为打印提供一个回调函数，以便数组/对象的遍历始终相同，但根据打印位置的不同，可能有许多输出格式(有点像访问者模式)。