Question

好的，所以我昨天关于将XML结果排序成关联数组的问题，这很好。（见我的代码）

  <?php 

$xmlData = 'http://xml.betfred.com/Horse-Racing-Daily.xml';
$xml = simplexml_load_file($xmlData);
$curdate = date('d/m/Y');

$new_array = array();
$limit = 5;
$c = 0;
foreach ($xml->event as $event) {
    if ($limit == $c) {
        break;
    }
    $c++;
    $eventd = substr($event->attributes()->{'date'},6,2);
    $eventm = substr($event->attributes()->{'date'},4,2);
    $eventy = substr($event->attributes()->{'date'},0,4);
    $eventt = $event->attributes()->{'time'};
    $new_array[$eventy.$eventm.$eventd.$eventt] = array(
        'eventd' => $eventd,
        'eventm' => $eventm,
        'eventy' => $eventy,
        'eventt' => $eventt,
        'eventdate' => $eventd.'/'.$eventm.'/'.$eventy,
        'eventid' => $event->attributes()->{'eventid'},
        'eventtime' => $event->attributes()->{'time'},
        'eventname' => $event->attributes()->{'name'},
        'venue' => $event->attributes()->venue,
    );
}

ksort($new_array);
foreach ($new_array as $event_time => $event_data) {
    echo "<a href=\"event/".$event_data['eventname']."/".$event_data['eventid']."\">".$event_data['venue'].' - '.$event_data['eventtime'].' - '.$event_data['eventname']."</a><br />".$event_data['eventdate']."<br />";
}
?>

我现在的问题是xml Feed中有记录有空值所以我现在需要以某种方式运行过滤器，以便如果日期属性值为空或小于2016，则不会显示，结果也必须按$ event_data [＆＃39; eventtime＆＃39;]值进行排序

提前致谢

已修复

<?php
$new_array = array();
//$limit = 5;
//$c = 0;
foreach ($xml->event as $event) {
    //if ($limit == $c) {
    //    break;
    //}
    $checkdate = date('Ymd');
        if($event->attributes()->{'date'} == $checkdate) {

    $eventd = substr($event->attributes()->{'date'},6,2);
    $eventm = substr($event->attributes()->{'date'},4,2);
    $eventy = substr($event->attributes()->{'date'},0,4);
    $startdate = substr($event->attributes()->{'date'},0,8);
    $eventt = $event->attributes()->{'time'};
    $new_array[$startdate.$eventt] = array(
        'startdate' => $startdate,
        'eventt' => $eventt,
        'eventd' => $eventd,
        'eventm' => $eventm,
        'eventy' => $eventy,
        'eventdate' => $eventd.'/'.$eventm.'/'.$eventy,
        'eventid' => $event->attributes()->{'eventid'},
        'eventtime' => $event->attributes()->{'time'},
        'eventname' => $event->attributes()->{'name'},
        'venue' => $event->attributes()->venue,
    );
}
}
ksort($new_array);
$showl = 10;
$n = 0;
foreach ($new_array as $event_time => $event_data) {
        if($showl ==$n){ break;}$n++;       
    $replace = array("/"," ");
    $eventname = str_replace($replace,'-', $event_data['eventname']);
    $venue = str_replace($replace,'-', $event_data['venue']);
    echo "<a href=\"event/".$venue."/".$eventname."/".$event_data['eventid']."\">".$event_data['venue'].' - '.$event_data['eventtime'].' - '.$event_data['eventname']."</a><br />";
}
}
?>

多数民众赞成我想做的事情，但可以想到我的思绪如何空白

Answer 1

<?php
function GHList5() {
$xmlData = 'http://xml.betfred.com/Greyhounds.xml';
//  $xmlData = 'http://xml.betfred.com/Horse-Racing-Daily.xml';
$xml = simplexml_load_file($xmlData);
$curdate = date('d/m/Y');

$new_array = array();
//$limit = 5;
//$c = 0;
foreach ($xml->event as $event) {
//    if ($limit == $c) {
//        break;
//    }
    $checkdate = date('Ymd');
        if($event->attributes()->{'date'} == $checkdate) {

    $eventd = substr($event->attributes()->{'date'},6,2);
    $eventm = substr($event->attributes()->{'date'},4,2);
    $eventy = substr($event->attributes()->{'date'},0,4);
    $startdate = substr($event->attributes()->{'date'},0,8);
    $eventt = $event->attributes()->{'time'};
    $new_array[$startdate.$eventt] = array(
        'startdate' => $startdate,
        'eventt' => $eventt,
        'eventd' => $eventd,
        'eventm' => $eventm,
        'eventy' => $eventy,
        'eventdate' => $eventd.'/'.$eventm.'/'.$eventy,
        'eventid' => $event->attributes()->{'eventid'},
        'eventtime' => $event->attributes()->{'time'},
        'eventname' => $event->attributes()->{'name'},
        'venue' => $event->attributes()->venue,
    );
}
}
ksort($new_array);
$showl = 10;
$n = 0;
foreach ($new_array as $event_time => $event_data) {
        if($showl ==$n){ break;}$n++;       
    $replace = array("/"," ");
    $eventname = str_replace($replace,'-', $event_data['eventname']);
    $venue = str_replace($replace,'-', $event_data['venue']);
    echo "<a href=\"event/".$venue."/".$eventname."/".$event_data['eventid']."\">".$event_data['venue'].' - '.$event_data['eventtime'].' - '.$event_data['eventname']."</a><br />";
}
}

?>

Answer 2

如果使用DOM，则可以使用PHP函数使用Xpath过滤节点。

过滤

function isNewerThen($current, $minimum) {
  return $current >= $minimum;
}

$document = new DOMDocument();
$document->loadXml($xml);
$xpath = new DOMXpath($document);
$xpath->registerNamespace("p", "http://php.net/xpath");
$xpath->registerPhpFunctions('isNewerThen');

$expression = '/category/event[
  p:function(
    "isNewerThen", 
    concat(@date, "T", @time, "Z"), 
    "20160106T1600Z"
  )
]';

$events = iterator_to_array(
  $xpath->evaluate($expression)
);

concat()是一个Xpath函数，它将所有参数粘合在一起作为字符串。参数可以是节点，节点列表，标量或文字。如果它是节点列表，则第一个节点将被强制转换为字符串。

p:function已解析为{http://php.net/xpath}:function并允许您从Xpath调用PHP函数。第一个参数是函数名称。所有其他参数都传递给调用。在这种情况下，属性可以用作ISO 8601日期时间值的一部分。

iterator_to_array将返回的DOMNodeList转换为数组。

排序

数组元素仍然是DOM节点。您可以使用Xpath或使用DOM Api方法获取属性并进行比较。 usort允许您使用比较函数对数组进行排序。

usort(
  $events,
  function($nodeA, $nodeB) {
    $timeA = sprintf('%sT%sZ', $nodeA->getAttribute('date'), $nodeA->getAttribute('time'));
    $timeB = sprintf('%sT%sZ', $nodeB->getAttribute('date'), $nodeB->getAttribute('time'));
    return strtotime($timeA) - strtotime($timeB);
  } 
);

foreach ($events as $event) {
  echo $xpath->evaluate('string(@meeting)', $event), " ";
  echo $event->getAttribute('date'), " ";
  echo $event->getAttribute('time'), "\n";
}

输出

Portman Park 20160106 1600
Marseille V' 20160106 1605
Kempton 20160106 1610
Steepledowns 20160106 1620
...

对已排序的数组结果运行筛选，然后创建新数组

2 个答案:

过滤

排序

输出