如何组织火车出发时间？(How to organize train departure times? PHP natural sort? [duplicate])

这个问题在这里已经有了答案：

我如何在PHP中对数组和数据进行排序？ 8个答案

我正在使用下面的代码来输出火车出发时间。但我无法按照出发时间对它们进行排序。我是新来的编码，所以不知道如何解决这个问题。我如何使用自然排序或其他解决方案来进行排序？

<?php $url = 'http://api.sl.se/api2/realtimedepartures.json?key=xxxx&siteid=9192&timewindow=30'; $jsondata = file_get_contents($url); $json = json_decode($jsondata,true); foreach ($json['ResponseData']['Metros'] as $metro) { if ($metro['DisplayTime'] != "Nu") { $output .= "<ul><li>".$metro['DisplayTime'].". </li>"; } else { $output .= "<ul><li>".$metro['DisplayTime']." avgår </li>"; } $output .= "<li>".$metro['GroupOfLine']."</li>"; $output .= "<li> nr ".$metro['LineNumber']." </li>"; $output .= "<li> till ".$metro['SafeDestinationName']."</li></ul>"; } echo $output; ?>

输出示例可以在http://beta.tunnelbanakarta.se/slussen查看

This question already has an answer here:

How can I sort arrays and data in PHP? 10 answers

I'm using the below code to output train departure times. But I can't get them sorted by time of departure. I'm new to coding so not sure how to solve this. How can I use natural-sort or some other solution to get this sorted?

<?php $url = 'http://api.sl.se/api2/realtimedepartures.json?key=xxxx&siteid=9192&timewindow=30'; $jsondata = file_get_contents($url); $json = json_decode($jsondata,true); foreach ($json['ResponseData']['Metros'] as $metro) { if ($metro['DisplayTime'] != "Nu") { $output .= "<ul><li>".$metro['DisplayTime'].". </li>"; } else { $output .= "<ul><li>".$metro['DisplayTime']." avgår </li>"; } $output .= "<li>".$metro['GroupOfLine']."</li>"; $output .= "<li> nr ".$metro['LineNumber']." </li>"; $output .= "<li> till ".$metro['SafeDestinationName']."</li></ul>"; } echo $output; ?>

Example of the output can be viewed at http://beta.tunnelbanakarta.se/slussen

最满意答案

您可以使用usort（）函数对数组进行排序。

<?php function cmp($a, $b) { if ($a['DisplayTime'] == $b['DisplayTime']) { return 0; } return ($a['DisplayTime'] < $b['DisplayTime']) ? -1 : 1; } $url = 'http://api.sl.se/api2/realtimedepartures.json?key=xxxx&siteid=9192&timewindow=30'; $jsondata = file_get_contents($url); $json = json_decode($jsondata,true); usort($json['ResponseData']['Metros'], "cmp"); foreach ($json['ResponseData']['Metros'] as $metro) { if ($metro['DisplayTime'] != "Nu") { $output .= "<ul><li>" . $metro['DisplayTime'] . ". </li>"; } else { $output .= "<ul><li>" . $metro['DisplayTime'] . " avgår </li>"; } $output .= "<li>" . $metro['GroupOfLine'] . "</li>"; $output .= "<li> nr " . $metro['LineNumber'] . " </li>"; $output .= "<li> till " . $metro['SafeDestinationName'] . "</li></ul>"; } echo $output; ?>

应该可以工作，但自从我使用这些函数（或PHP）之后已经很长时间了，所以最好仔细研究一下，看看能否找到一种更干净的方式。

You could use the usort() function to sort the array.

<?php function cmp($a, $b) { if ($a['DisplayTime'] == $b['DisplayTime']) { return 0; } return ($a['DisplayTime'] < $b['DisplayTime']) ? -1 : 1; } $url = 'http://api.sl.se/api2/realtimedepartures.json?key=xxxx&siteid=9192&timewindow=30'; $jsondata = file_get_contents($url); $json = json_decode($jsondata,true); usort($json['ResponseData']['Metros'], "cmp"); foreach ($json['ResponseData']['Metros'] as $metro) { if ($metro['DisplayTime'] != "Nu") { $output .= "<ul><li>" . $metro['DisplayTime'] . ". </li>"; } else { $output .= "<ul><li>" . $metro['DisplayTime'] . " avgår </li>"; } $output .= "<li>" . $metro['GroupOfLine'] . "</li>"; $output .= "<li> nr " . $metro['LineNumber'] . " </li>"; $output .= "<li> till " . $metro['SafeDestinationName'] . "</li></ul>"; } echo $output; ?>

Should work but it's been a long time since I used these function (or PHP for that matter) so best look into it to see if you can find a cleaner way.

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