在不存在對象上下文錯誤時使用$ this

Question

嘗試執行腳本時出現致命PHP錯誤：Using $this when not in object context該腳本通過API從Google Analytics收集數據，然後將其顯示在頁面上。

下面是一段代碼在腳本死亡：

$records = $this->getAnalyticRecords (date ('Y-m-d', $startTime), date ('Y-m-d', $endEnd), 'ga:date', 'ga:visitors,ga:newVisits,ga:visits,ga:pageviews,ga:timeOnPage,ga:bounces,ga:entrances,ga:exits'); 

getAnalyticsRecords被設置：

function getAnalyticRecords($startDate, $endDate, $dimensions, $metrics, $sort = '', $maxResults = '') { 

    $url = 'https://www.google.com/analytics/feeds/data'; 
    $url .= "?ids=" . $this->profile; 
    $url .= "&start-date=" . $startDate; 
    $url .= "&end-date=" . $endDate; 
    $url .= "&dimensions=" . $dimensions; 
    $url .= "&metrics=" . $metrics; 
    if (! empty ($sort)) { 
     $url .= "&sort=" . $sort; 
    } 
    if (! empty ($maxResults)) { 
     $url .= "&max-results=" . $maxResults; 
    } 
    if (($feedData = $this->fetchFeed ($url)) === FALSE) { 
     return array(); 
    } 
    $doc = new DOMDocument (); 
    $doc->loadXML ($feedData); 
    $results = array(); 

    $aggregates = $doc->getElementsByTagName ('aggregates'); 
    foreach ($aggregates as $aggregate) { 
     $metrics = $aggregate->getElementsByTagName ('metric'); 
     foreach ($metrics as $metric) { 
      $results ['aggregates'] ['metric'] [$metric->getAttribute ('name')] = $metric->getAttribute ('value'); 
     } 
    } 

    $entries = $doc->getElementsByTagName ('entry'); 
    foreach ($entries as $entry) { 
     $record = array(); 
     $record ["title"] = $entry->getElementsByTagName ('title')->item (0)->nodeValue; 
     $dimensions = $entry->getElementsByTagName ('dimension'); 
     foreach ($dimensions as $dimension) { 
      $record ['dimension'] [$dimension->getAttribute ('name')] = $dimension->getAttribute ('value'); 
     } 
     $metrics = $entry->getElementsByTagName ('metric'); 
     foreach ($metrics as $metric) { 
      $record ['metric'] [$metric->getAttribute ('name')] = $metric->getAttribute ('value'); 
     } 
     $results ['entry'] [] = $record; 
    } 
    return $results; 
} 

Answer 1

你應該聽的錯誤。不在課堂上時，您正在使用$this。

嘗試將您的代碼放在課程中或省略$this->。改爲使用global。