Question

我有一个关联数组，它被分配给smarty模板。在那里，我不了解如何访问一个特定的密钥。我研究过它，但无法得到具体的解决方案。方案如下：

我的名为$all_class_subjects的php数组如下：

现在我想在smarty模板中打印此数组中的值。代码段如下所示。它可能包含很少的HTML错误：

{if $all_class_subjects}
         {foreach from=$all_class_subjects item=class_subject_data}
       <tr>
           <td width="20%">{$class_subject_data.class_name|capitalize}</td>
           <td width="40%">
            {foreach from=class_subject_data item=subject}

            {if $subject.cls_sub_subject_name} 
             {$class_subject_data.cs_subject_id}

我的问题是我想检查数组是否

[I] => Array
            (
                [cs_map_id] => 
                [cs_class_id] => 
                [cs_subject_id] => 
                [subjects] => 
            )

是否为空。您可以看到除了最后两个元素之外，所有数组元素都将这些字段设为空。所以简而言之，我的问题是如何访问包含上述字段的内部数组作为数组的索引，即键（I，II，III，IV等）正在改变？返回数组的PHP函数如下：

function GetAllClassSubjects( $cur_page, $sort_col_id, $desc_or_asc, $request) { 
        global $grid;

      $grid->mSqlArr['fields']  = " classes.class_id, classes.class_name" ;
          $grid->mSqlArr['tables']  =   TBL_CLASSES." AS classes ";
          $grid->mSqlArr['orderby'] = "classes.class_order";

          $grid->mSqlArr['where'] = "";

          $grid->mCurPage    = $cur_page;
          $grid->mRecPerPage = REC_PER_PAGE; //default is 20
          $grid->mSortColumns->mColsArr = array('class_id');
          $grid->mSortColumns->mDefaultOrderStr = "";
          $grid->mSortColumns->mCurColNo        = $sort_col_id;
          $grid->mSortColumns->mCurSortOrder    = "DESC";
          $class_data = $grid->GetData();

          //print_p($class_data);
      $grid->mSqlArr['fields']  = " class_subject_mapping.cs_map_id, class_subject_mapping.cs_class_id, class_subject_mapping.cs_subject_id" ;
          $grid->mSqlArr['tables']  =   TBL_CLASS_SUBJECT_MAPPING." AS class_subject_mapping ";
          $grid->mSqlArr['orderby'] = "";

          $grid->mSqlArr['where'] = "";

            $grid->mCurPage    = $cur_page;
            $grid->mRecPerPage = REC_PER_PAGE; //default is 20
            $grid->mSortColumns->mColsArr = array('cs_map_id');
            $grid->mSortColumns->mDefaultOrderStr = "";
            $grid->mSortColumns->mCurColNo        = $sort_col_id;
            $grid->mSortColumns->mCurSortOrder    = "DESC";
            $mapping_data = $grid->GetData();
            //print_p($mapping_data);   

      foreach($class_data as $class)
      {
        $flag = 0;
        $class_id = $class['class_id'];
        $class_name = $class['class_name'];

            foreach($mapping_data as $class_subject)
            {
                $cs_map_id = $class_subject['cs_map_id'];
                $cs_class_id = $class_subject['cs_class_id'];
                $cs_subject_id = $class_subject['cs_subject_id'];


                    if($class_id == $cs_class_id)
                    {
                            $flag = 1;
                            $class_data[$class_id-1][$class_name]['cs_map_id'] = $cs_map_id;
                            $class_data[$class_id-1][$class_name]['cs_class_id'] = $cs_class_id;
                            $class_data[$class_id-1][$class_name]['cs_subject_id'] = $cs_subject_id;

                            $sql  = " SELECT subject_name";
                                    $sql .= " FROM ".TBL_SUBJECTS." AS subjects";
                                    $sql .= " WHERE subjects.subject_id = ".$cs_subject_id;
                                    $sql .= " order by subject_order";

                                    $this->mDb->Query( $sql);
                                    $class_subjects_data = $this->mDb->FetchArray();
                                    //print_p($class_subjects_data);

                                    foreach($class_subjects_data as $sub)
                                    {
                                        $class_data[$class_id-1][$class_name]['subjects'] = $sub;
                                    }
                            }                           
                    }
                    if($flag == 0)
                    {
                        $class_data[$class_id-1][$class_name]['cs_map_id'] = "";
                $class_data[$class_id-1][$class_name]['cs_class_id'] = "";
                $class_data[$class_id-1][$class_name]['cs_subject_id'] = "";
                $class_data[$class_id-1][$class_name]['subjects'] = "";

                    }   
      }
      print_p($class_data);

        //ksort($cls_sub_data[$cs_map_id]); 

    //print_p($cls_sub_data);
    list( $sort_url_param, $sort_col_array, $pagination_array ) =
        $grid->GetUrlParam( PAGE_OFFSET, PHP_SELF."?op=".$query_string."&", "col", 'order', 'page' );

        return array($class_data, $sort_url_param, $sort_col_array, $pagination_array );
}

请帮我解决此问题。提前谢谢。

Answer 1

在您的外部{foreach}内，{$class_subject_data[$class_subject_data.class_name]}将为您提供所需的

Array(
    [cs_map_id] => 
    [cs_class_id] => 
    [cs_subject_id] => 
    [subjects] => 
)

表示当前item=class_subject_data

尝试使用此代码，应该打印所有需要的数组。

{if $all_class_subjects}
    {foreach from=$all_class_subjects item=class_subject_data}
        <tr>
            <td width="20%">{$class_subject_data.class_name|capitalize}</td>
            <td width="40%">
                {assign var='desired_array' value=$class_subject_data[$class_subject_data.class_name]}

                <pre>{$desired_array|@print_r:1}</pre>
            </td>
        </tr>
    {/foreach}
 {/if}

更新

假设上面的代码为您打印了所需的数组，{$desired_array}是

array(
    [cs_map_id] => 
    [cs_class_id] => 
    [cs_subject_id] => 
    [subjects] =>
)

因此它包含密钥，例如{desired_array.cs_map_id}，{desired_array.cs_class_id}等

如何从smarty中的关联数组访问特定的键？

1 个答案:

更新