PHP 脚本导致 array_merge 和 usort 警告。结果文件为空

Question

我对这件事很困惑。我的服务器上有一个 PHP 文件。它被编写用于从 Google 日历中提取事件信息并将结果数据写入单独的文本文件。 PHP 文件在 7 月 1 日之前一直运行良好。我不确定发生了什么导致错误，但是另一个人正在使用相同的脚本（他编写了它，并且对他来说仍然可以正常工作），所以我很确定这不是结果谷歌改变了一些东西。这是访问文件时返回的具体错误。

`警告：array_merge() [function.array-merge]：参数 #2 不是第 111 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：usort() [function.usort]：参数应该是第 120 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：array_merge() [function.array-merge]：参数 #2 不是第 111 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：usort() [function.usort]：参数应该是第 120 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：array_merge() [function.array-merge]：参数 #2 不是第 111 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：usort() [function.usort]：参数应该是第 120 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：array_merge() [function.array-merge]：参数 #2 不是第 111 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：usort() [function.usort]：参数应该是第 120 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：array_merge() [function.array-merge]：参数 #2 不是第 111 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：usort() [function.usort]：参数应该是第 120 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：array_merge() [function.array-merge]：参数 #2 不是第 111 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：usort() [function.usort]：参数应该是第 120 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：array_merge() [function.array-merge]：参数 #2 不是第 111 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：usort() [function.usort]：参数应该是第 120 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：array_merge() [function.array-merge]：参数 #2 不是第 111 行 /home/westfork/public_html/AppData/DataSources/index.php 中的数组

警告：usort() [function.usort]：参数应该是 /home/westfork/public_html/AppData/DataSources/index.php 第 120 行中的数组`

这是 PHP 文件。任何帮助都会很棒。

<?php

$today = date("F j, Y");
$thisWeek = date("W");
$thisYear = date("Y");


/*
 *  Represents individual events within a calendar
 */
Class Event
{   
public $allDay; // "1" or ""
public $multiDay; // "1" or ""
public $date; // "F j, Y"
public $time; // String
public $start; // Timestamp
public $end; // Timestamp
public $section; // String
public $title; // String
public $description; // String
public $location; // String

/**
 * @param array $event - an entry node from the Google calendar feed
 */
public function __construct($event) 
{               
    // set the Event properties based on the array keys and values
    foreach($event as $key=>$value) {
        $this->{$key} = $value;
    }

    $this->time = $this->relativeTime();

    // set the section header for this event
    $this->section = $this->sectionHeader();

}

/**
 * @return string - the section heading based on when the event is in relation to the 
 * current date, e.g., "Today", "This Week", "May", "Dec", etc.
 */
protected function sectionHeader() {
    global $today, $thisWeek, $thisYear;

    // determine which section header to apply
    if (strtotime($today) == $this->date) {
        return "Today";
    } else if (date("F j, Y", strtotime($today) + (60*60*24)) === date("F j, Y", $this->date)) {
        return "Tomorrow";
    } else if ($thisYear === date("Y", $this->date)) { 
        return date("l, F j", $this->date);
    } else {
        return date("l, F j, Y", $this->date);
    }
}

protected function relativeTime() {
    // if the event isn't and all-day event, set the relative start and end times
    if (!$this->allDay) {

        // if the start and end times are outside of the current day, set $allDay to "1"
        if ($this->start <= $this->date && $this->end >= $this->date + (60*60*24)) {
            return "All Day";
        }
        // if both the start and end are within the current day
        else if ($this->start > $this->date && $this->end < $this->date + (60*60*24)) {
            return date("g:i A", $this->start) . " - " . date("g:i A", $this->end);
        }

        // if the start is within the current day
        else if ($this->start > $this->date && $this->start < $this->date + (60*60*24)) {
            return date("g:i A", $this->start);
        }
        // if the end is within the current day
        else if ($this->end > $this->date && $this->end < $this->date + (60*60*24)) {
            return 'ends: ' . date("g:i A", $this->start);
        }
    } else {
        return "All Day";
    }
}


}

/*
 *  Represents a calendar containing events
 */
Class Calendar
{
protected $events = array();
protected $name;

/**
 * @param String $name - the name of the calendar (will be used as the file name for saving)
 */
public function __construct($name) 
{
    $this->name = $name;
}

/**
 * Adds a an array of Event to the calendar. 
 *  @param array $events - an array of Events
 */
public function addEvents($events)
{
    $this->events = array_merge($this->events, $events);
    $this->sortEvents();
}

/**
 * Sorts the $this->events array 
 */
protected function sortEvents()
{
    usort($this->events, array($this, 'compareTwoEventsForSort'));
}

/**
 * Compare function for sortEvents()
 * Compares first by Event::$date and then Event::$start
 */
protected function compareTwoEventsForSort($x, $y) {

    // compare the dates
    if ( $x->date < $y->date) {
      return -1;
    }
    if ( $x->date > $y->date) {
        return 1;
    }

    // the dates are equal, so now compare the times
    if ($x->start < $y->start) {
        return -1;
    } else if ($x->start > $y->start) {
        return 1;
    } else {
        return 0;
    }

}

public function listEvents() {
    print_r($this->events);
}

public function saveCalendarAsFile() {
    // Log the results into separate calendar text files.
    $file = fopen("{$this->name}.txt", 'w');
    fwrite($file, json_encode($this->events));
    fclose($file);      
}   
}

/*
 *  Handles the creation and saving of Calendars and Events
 */
Class CalendarController
{

public $calendar;

/**
 * @param String $id - the id of the google calendar
 */
public function __construct($name, $id)
{       
    $today = date("Y-m-d");

    if ( strtotime(date("Y") . "-06-01") > time()) {
        $yearEnd = date("Y") . "-08-01";
    } else {
        $yearEnd = ((int) date("Y") + 1) . "-08-01";
    }

    $url = "https://www.google.com/calendar/feeds/{$id}/public/";
    $url .= "full?";
    $url .= "&start-min=$today&start-max=$yearEnd";
    $url .= "&max-results=1000";
    $url .= "&orderby=starttime";
    $url .= "&sortorder=a";
    $url .= "&singleevents=true";
    $url .= "&ctz=America/Chicago";
    $url .= "&fields=entry(title,content,gd:where,gd:when)";

    $xml = file_get_contents($url);

    // get rid of the namespace "gd:"
    $xml = str_replace("gd:", "", $xml);
    $xml = new SimpleXMLElement($xml);

    $events = $this->parseEventsFromGoogleXML($xml);
    $this->calendar = new Calendar($name);
    $this->calendar->addEvents($events);
}

public function listCalendarEvents() {
    $this->calendar->listEvents();
}

public function saveCalendarAsFile() {
    $this->calendar->saveCalendarAsFile();
}

/**
 * @param SimpleXMLElement $xml - a simpleXML object of the Google calendar feed
 */
protected function parseEventsFromGoogleXML($xml)
{
    global $today;

    $events = array();
    foreach ($xml->entry as $entry) {

        $start = strtotime($entry->when['startTime']);
        $end = strtotime($entry->when['endTime']);

        // if the $end time is 12:00 AM the next morning, make it 11:59 PM the previous day
        if (date("H:i", $end) === "00:00") {
            $end -= 1;
        }

        $startDate = date("F j, Y", $start);
        $endDate = date("F j, Y", $end);

        $allDay = (strpos($entry->when['startTime'] . $entry->when['endTime'], "T") === false) ? "1" : "";
        $multiDay = ($startDate !== $endDate) ? "1" : "";

        // iterate through each day of the event
        $loopEndDate = strtotime($endDate);
        $loopToday = strtotime($today);
        $loopDate = strtotime($startDate);

        for ( ; $loopDate <= $loopEndDate; $loopDate += (60*60*24) )
        {               
            if ($loopDate >= $loopToday) {

                // clean up the description text
                // replace <br> tags with \n, delete \t characters, and remove all non-link tags
                $description = (string) $entry->content;
                $description = trim($description);
                $description = preg_replace("/<br[^>]*>/i", "\n", $description);
                $description = preg_replace("/\n */", "\n", $description);
                $description = preg_replace("/\n{3,}/", "\n\n", $description);
                $description = strip_tags($description, "<a>");
                $description = preg_replace("/([ \t]*$)|(^[ \t]*)/m", "", $description);
                $description = htmlspecialchars($description, ENT_NOQUOTES, 'UTF-8', false);

                $event = new Event(array(
                    'date' => $loopDate,
                    'allDay' => $allDay,
                    'multiDay' => $multiDay,
                    'start' => $start,
                    'end' => $end,
                    'title' => (string) $entry->title,
                    'description' => $description,
                    'location' => (string) $entry->where['valueString'],
                ));
                $events[] = $event;
            }
        }
    }
    return $events;
}

}


$calendars = array(
"Academic" => "westmont.edu_tker7t4jgfoi6i7msien0smimk@group.calendar.google.com",
"Athletics" => "westmont.edu_a2o3k05co4i3tt5voc1ginging@group.calendar.google.com",
"Chapel" => "westmont.edu_olec4f6vb91cn02e9higcab57c@group.calendar.google.com",
"Events" => "westmont.edu_mnjvcd9e9224q9m723nurbl8ks@group.calendar.google.com",
"Dining" => "3mipcafj6qeqs1m9mfpngv97q0@group.calendar.google.com",
"Band" => "westforkband.org_kg9n1kin34c3eovt6l2gomvlb8%40group.calendar.google.com",
"Rehearsal" => "westforkband.org_mvibrgiu71ldvrnfh6r4rdf3fc@group.calendar.google.com",
"Parking" => "westforkband.org_t8jj4b5l9b3li2n31ce67ecc84@group.calendar.google.com",
// "Development" => "westmont.edu_atsog3h7vsf4k3s5r1f6e2p660%40group.calendar.google.com",

);


foreach($calendars as $name=>$id) {
$ecc = new CalendarController($name, $id);
$ecc->listCalendarEvents();
$ecc->saveCalendarAsFile();
}

Answer 1

您是否尝试过在addEvents 方法中输出$events 参数中的内容？

尝试在第 111 行之前执行var_dump($events);，看看会发生什么。.

var_dump($events);
$this->events = array_merge($this->events, $events);

这将显示$events 的完整结构，包括属性类型。如果这是通过 cron 作业或其他东西运行的，您可能希望将 var 输出到日志文件或其他东西。

此外，您最好在尝试合并之前检查 $events 是否是一个数组：

if (is_array($events)) {
    $this->events = array_merge($this->events, $events);
    $this->sortEvents();
}

如果您每次都应该是一个数组，您仍应保留该条件，但添加一个 else，通过日志通知您 $events 是什么，以便您可以在这些情况下正确处理它。

Answer 2

不想这么说，但我粘贴了提供的代码，它对我有用（感谢给定的日历地址）。 parseEventsFromGoogleXML 必须失败，可能是因为连接错误，或者时间限制，或者其他任何原因。你需要处理它。在$events = $this->parseEventsFromGoogleXML($xml); 之前将$events 设为空数组，使用异常并尝试/捕获它们，在继续之前检查连接和/或XML 结果等。确保您的服务器可以从外部处理文件。