顯示PHP數組元素

Question

你好我有以下陣列，其結果形成基於（isset） 功能正在被調用的函數：list_activity_details_array（）返回：

{"activity_related_to_id":"2","activity_id":"14","activity_type_icon":"fa fa-phone","activity_title":"call","activity_created_by":"User Last","activity_create_date":"03-08-2015","activity_due_date":"04-01-2015","acitvity_url_param":"contact_id","activity_details":"email and call details"}) 

我怎樣才能在html中查看數組元素。例如。如果該字段是activity_details。我怎樣才能通過調用函數和元素來查看activity_details？

這裏是顯示數組的代碼：

function list_activity_details_array(){ 
      global $connection; 
     //$contact_id = $_REQUEST['contact_id']; 
     $activity_id = $_REQUEST['activity_id']; 
     $get = "SELECT * FROM activity_base WHERE activity_id = '$activity_id' " 
            or die("Error: ".mysqli_error($connection)); 
     $query = mysqli_query($connection, $get); 
    //Get activity base information 
    $activity_array = array(); 
     while ($activity = mysqli_fetch_array($query)){ 
      $activity_related_to_id = $activity ['activity_related_to_id']; 
      $activity_id = $activity['activity_id']; 
      $activity_type_id = $activity['activity_type_id']; 
     $activity_entity_type_id = $activity['activity_entity_type_id']; 
      $activity_title = $activity['activity_title']; 
      $activity_created_by = $activity['activity_created_by']; 
      $activity_status_code_id = $activity['activity_status_code_id']; 
      //$activity_type_icon; 

     //Reverse Date 
     $activity_create_date = date("m-d-Y", strtotime($activity['activity_created_on'])); 
     $activity_due_date = date("m-d-Y", strtotime($activity['activity_due_date'])); 

      if ($activity_type_id == "1"){ 
       $activity_type_icon = "fa fa-envelope"; 
      }else if ($activity_type_id == "3"){ 
       $activity_type_icon = "fa fa-suitcase"; 
      }else if ($activity_type_id == "2"){ 
       $activity_type_icon = "fa fa-phone"; 
      } 

     if ($activity_entity_type_id == "1") { 
     $acitvity_url_param = "acct_id"; 
     $acitivty_is_for ="accounts_base"; 
     //$page_url = "account-profile.php"; 
     }else if ($activity_entity_type_id == "2") { 
     $acitvity_url_param = "contact_id"; 
     $acitivty_is_for ="contacts"; 
     //$page_url = "contact-profile.php"; 
     }else if ($activity_entity_type_id == "3") { 
     $acitvity_url_param = "contact_id"; 
     $acitivty_is_for ="contacts"; 
     //$page_url = "contact-profile.php"; 
     } 
      //Get detailed activity information 
     //If activity is Email 
    if ($activity_type_id == "1") { 
     $email_details = email_activity_details($activity_id); 
     while ($email = mysqli_fetch_assoc($email_details)) { 
      $activity_details = nl2br($email['email_message']); 

     } 
    }else if ($activity_type_id == "2") { 
     $call_details = call_activity_details($activity_id); 
     while ($call = mysqli_fetch_assoc($call_details)) { 
      $activity_details = $call['call_details']; 
      } 
     }else if ($activity_type_id == "3") { 
     $meeting_details = meeting_activity_details($activity_id); 
     while ($meeting = mysqli_fetch_assoc($meeting_details)) { 
      $activity_details = $meeting['meeting_details']; 
      } 
     } 
     //Get creator user info 
      $user_query = get_user_info($activity_created_by); 
      while ($user = mysqli_fetch_array($user_query)) { 
      $activity_created_by = $user['user_full_name']; 
      } 
      $activity_array['activity_related_to_id'] = $activity['activity_related_to_id']; 
      $activity_array['activity_id'] = $activity['activity_id']; 
      $activity_array['activity_related_to_id'] = $activity['activity_related_to_id']; 
      $activity_array['activity_type_icon'] = $activity_type_icon; 
      $activity_array['activity_title'] = $activity['activity_title']; 
      $activity_array['activity_created_by'] = $activity_created_by; 
      $activity_array['activity_create_date'] = $activity_create_date; 
      $activity_array['activity_due_date'] = $activity_due_date; 
      $activity_array['acitvity_url_param'] = $acitvity_url_param; 
      $activity_array['activity_details'] = $activity_details; 
      $activity_array['activity_title'] = $activity['activity_title']; 

      $encode = json_encode($activity_array); 
      print_r($encode); 
     } 
    } 
if (isset($_REQUEST['activity_id'])) { 
    list_activity_details_array(); 
} 

Answer 1

看起來像JSON我，所以你需要

$foo = json_decode($output); 

然後應該讓你參考：

echo $foo['activity_related_to_id']; 
// Outputing 2