致命错误：未捕获错误：访问未声明的静态属性：Get_category :: $ arr在/opt/lampp/htdocs/IRIS/controllers/get_category.php:9

Question

我不断收到标题中上面列出的错误。在名为Get_category的类中，我试图从名为Categorize的类访问名为$ arr的静态数组。

这里就是我试图访问数组的Get_category类：

class Get_category extends Controller{ 
     function run($xml){ 
     global $FILE_ROOT, $STORAGE, $REQ_ID, $CMD_EXTRA, $LIB, $BIN; 
     include_once __DIR__.'/categorize.php'; 
     $file = $xml->filename; 
     $arr = Categorize::$arr; 
     /*$arrlength = count($arr);*/ 
    $arrlength = max(array_map('count',self::$arr)); 
     $response = "<parameters>\n<requestID>" . $REQ_ID ."</requestID>\n<requestType>get_category</requestType>"; 

     for($i = 0; $i < self::$arrlength; $i++){ 
     $lengthcolumn = count(self::$arr[$i]); 
      for($j = 0; $j < $lengthcolumn; $j++){ 
       if(self::$arr[$i][$j] == $file){ 
       echo self::$arr[$i][$j]; 
       $response .= "<resource><id>" . self::$arr[$i][$j] . "</id>"; 
     $response .= "</resource>"; 
       } 

      } 

     } 

     $response .= "</parameters>"; 

     return $response; 

     } 

} 

这里是群归类类，其中静态数组位于：

 class Categorize extends Controller{ 
     public static $arr = array(); 
     function run($xml){ 
       global $FILE_ROOT, $STORAGE, $REQ_ID, $CMD_EXTRA, $LIB, $BIN; 

       $numCategories = intval($xml->numCategories); 
       self::$arr; 
       /*self::$arr = array();*/ 

       /*if(!pe($xml, "resourceList")) die(err("No resources found"));*/ 

       for($i=0;$i < $numCategories; $i++){ 
        $name = intval($xml->nameCat); 
         if($i=0){ 
          self::$arr[0][0] = $name; 
         }else{ 
          self::$arr[$i][0] = $name; 
         } 

       } 
       $j = 0; 
       while($j < $numCategories){ 
        $numDoc = intval($xml->numDoc); 
         $k = 0; 
         foreach($xml->resourceList->resource as $res){ 
            self::$arr[$j][$k] = $res; 
            $k++; 
         } 
        $j++;   
       } 
      $output = "Done!"; 
      $response = "<parameters><requestType>categorize</requestType><requestID>". $REQ_ID . "</requestID><resourceList>". $output . "</resourceList></parameters>"; 

      return $response; 
     } 
} 

Answer 1

在你Get_category类，你不应该将您的局部变量称为静态类成员。换句话说，你的类应该是这样的：

class Get_category 
{ 
    function run($xml) 
    { 
     global $FILE_ROOT, $STORAGE, $REQ_ID, $CMD_EXTRA, $LIB, $BIN; 

     $file = $xml->filename; 
     $arr = Categorize::$arr; 
     /*$arrlength = count($arr);*/ 
     $arrlength = max(array_map('count', $arr)); 
     $response = "<parameters>\n<requestID>" . $REQ_ID . "</requestID>\n<requestType>get_category</requestType>"; 

     for ($i = 0; $i < $arrlength; $i++) 
     { 
      $lengthcolumn = count($arr[$i]); 
      for ($j = 0; $j < $lengthcolumn; $j++) 
      { 
       if ($arr[$i][$j] == $file) 
       { 
        echo $arr[$i][$j]; 
        $response .= "<resource><id>" . $arr[$i][$j] . "</id>"; 
        $response .= "</resource>"; 
       } 
      } 
     } 

     $response .= "</parameters>"; 

     return $response; 
    } 

} 

随着自我:: $ ARR和自我:: $ arrlength所有引用更改为$ ARR和$ arrlength