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Php 无法在codeigniter的查看页面上显示文件错误消息_Php_Codeigniter_File Upload - Fatal编程技术网

Php 无法在codeigniter的查看页面上显示文件错误消息

Php 无法在codeigniter的查看页面上显示文件错误消息,php,codeigniter,file-upload,Php,Codeigniter,File Upload,我试图使用flashdata显示图像上载错误消息,但下面显示的代码工作不正常。原因可能是什么 请给我一个解决这个问题的办法 mycontrollerPage.php class Booksetups extends CI_Controller { function book($book_id = 0) { $config = array(); $config['base_url'] = 'http://localhost/thexxr.com/B

我试图使用
flashdata
显示图像上载错误消息,但下面显示的代码工作不正常。原因可能是什么

请给我一个解决这个问题的办法

mycontrollerPage.php

class Booksetups extends CI_Controller  
{
    function book($book_id = 0)
    {
       $config = array(); 
       $config['base_url'] = 'http://localhost/thexxr.com/Booksetups/book/pgn/';
       $config["total_rows"] = $this->Booksmodel->record_count(); 
       $config['uri_segment'] = 4; 
       $config['per_page'] = 5;  
       $config['full_tag_open'] = '<div id="pagination">';
       $config['full_tag_close'] = '</div>';

        //------------not wroking file upload error validation------------------------------------------   
        $config['upload_path'] = 'uploads/'; 
        $config['allowed_types'] = 'gif|jpg|jpeg|png'; 
        $config['max_size'] = '1000'; 
        $config['max_width'] = '1920'; 
        $config['max_height'] = '1280'; 
        $config['remove_spaces'] = 'TRUE'; 
        $config['file_path'] = 'TRUE'; 
        $config['full_path']    = '/uploads/';

        $this->load->library('upload', $config);
        $this->upload->do_upload("img1");
        $this->upload->do_upload("img2");
        //------------------------------------------------------------------------


       $this->pagination->initialize($config);   
       $page = ($this->uri->segment(4)) ? $this->uri->segment(4) : 0;   

       $this->form_validation->set_error_delimiters('<div  class="error">', '</div>')->set_rules('subject_id', 'subject_id','trim|required|min_length[1]|max_length[150]|xss_clean');
       $this->form_validation->set_error_delimiters('<div  class="error">', '</div>')->set_rules('cover_id', 'cover_id','trim|required|min_length[1]|max_length[150]|xss_clean');
       $this->form_validation->set_error_delimiters('<div  class="error">', '</div>')->set_rules('language_id', 'language_id','trim|required|min_length[1]|max_length[150]|xss_clean');
       $this->form_validation->set_error_delimiters('<div  class="error">', '</div>')->set_rules('edition_id', 'edition_id','trim|required|min_length[1]|max_length[150]|xss_clean');

        if(($this->input->post('book_id'))&& ($this->form_validation->run() === TRUE))
        {  
            if( ! $this->upload->do_upload()) //trying to display error
            {
                   $error = array('error' => $this->upload->display_errors()); 
                   $this->session->set_flashdata('error', $error);
                   redirect(current_url()); 
            }
            $this->session->set_flashdata('msg', '1 row(s) affected.');
            $this->Booksmodel->entry_update();  
            redirect(current_url());
        }
    }
}       
类书籍设置扩展CI_控制器
{
功能书($book\u id=0)
{
$config=array();
$config['base_url']='http://localhost/thexxr.com/Booksetups/book/pgn/';
$config[“总计行数”]=$this->Booksmodel->record_count();
$config['uri_segment']=4;
$config['per_page']=5;
$config['full_tag_open']='';
$config['full_tag_close']='';
//------------未写入文件上载错误验证------------------------------------------
$config['upload_path']=“uploads/”;
$config['allowed_types']='gif | jpg | jpeg | png';
$config['max_size']='1000';
$config['max_width']='1920';
$config['max_height']='1280';
$config['remove_spaces']='TRUE';
$config['file_path']='TRUE';
$config['full_path']='/uploads/';
$this->load->library('upload',$config);
$this->upload->do_upload(“img1”);
$this->upload->do_upload(“img2”);
//------------------------------------------------------------------------
$this->pagination->initialize($config);
$page=($this->uri->segment(4))?$this->uri->segment(4):0;
$this->form_validation->set_error_delimiters('','')->set_rules('subject_id','subject_id','trim | required | min_length[1]| max_length[150]| xss_clean');
$this->form_validation->set_error_delimiters('','')->set_rules('cover_id','cover_id','trim | required | min_length[1]| max_length[150]| xss_clean');
$this->form_validation->set_error_delimiters('','')->set_rules('language_id','language_id','trim | required | min_length[1]| max_length[150]| xss_clean');
$this->form_validation->set_error_delimiters('','')->set_rules('edition_id','edition_id','trim | required | min_length[1]| max_length[150]| xss_clean');
如果($this->input->post('book_id'))&($this->form_validation->run()==TRUE))
{  
如果(!$this->upload->do_upload())//试图显示错误
{
$error=array('error'=>$this->upload->display_errors());
$this->session->set_flashdata('error',$error);
重定向(当前url());
}
$this->session->set_flashdata('msg','1行受影响');
$this->Booksmodel->entry_update();
重定向(当前url());
}
}
}       
Myview.php

<?php echo '<fieldset><legend>'. $formtopic.'</legend>' ?>  

<?php echo validation_errors();  ?>   
<?php 
    $message = $this->session->flashdata('msg');  
    if($message)
    {
    ?>
    <div class="success" id="msgdiv"><?php echo  $this->session->flashdata('msg'); ?></div> 
    <?php 
    }
?>  

<?php 
$message = $this->session->flashdata('error');  
    if($message)
    {
    ?> 
    <?php echo $error;?>   
    <!-- Here i am getting. Message like "array" why not i am getting the error message instead? --> 
<?php 
    }
?> 

以下是一些my helper函数,用于设置和显示CI中的错误

if (!function_exists('set_flash_message'))
{
    function set_flash_message($title, $message, $type='success')
    {
        $CI =& get_instance();
        $CI->session->set_flashdata(
            'flash_message',
            array(
                'type' => $type,
                'title' => $title,
                'text' => $message));
    }
}

if (!function_exists('flash_message'))
{
    function flash_message()
    {
        $CI =& get_instance();
        $message = $CI->session->flashdata('flash_message');
        return $CI->load->view('desktop/flash_message', $message, TRUE);
    }
}
您可以设置来自控制器的消息:

set_flash_message('Error', 'Something went wrong', 'error');
并从视图中显示错误

<?php echo flash_message(); ?>

以下是一些my helper函数,用于设置和显示CI中的错误

if (!function_exists('set_flash_message'))
{
    function set_flash_message($title, $message, $type='success')
    {
        $CI =& get_instance();
        $CI->session->set_flashdata(
            'flash_message',
            array(
                'type' => $type,
                'title' => $title,
                'text' => $message));
    }
}

if (!function_exists('flash_message'))
{
    function flash_message()
    {
        $CI =& get_instance();
        $message = $CI->session->flashdata('flash_message');
        return $CI->load->view('desktop/flash_message', $message, TRUE);
    }
}
您可以设置来自控制器的消息:

set_flash_message('Error', 'Something went wrong', 'error');
并从视图中显示错误

<?php echo flash_message(); ?>

正如我在评论中所说


您正在获取阵列,因为您正在设置闪存错误消息 作为数组[
$error=array('error'=>
$this->upload->display_errors();
],尝试将其设置为一个字符串

如果查看源代码中的函数,它要么接受哈希数组,要么接受字符串。
如果传递了一个数组,那么它将使用键将flashdata设置为FlashMessage类型,message设置为value;忽略第二个参数。
如果将两个参数作为字符串传递,它将使用第一个字符串设置flashdata键

也可以这样做

$this->session->set_flashdata('error', 'something went wrong');

源代码:

function set_flashdata($newdata = array(), $newval = '')
    {
        if (is_string($newdata))
        {
            $newdata = array($newdata => $newval);
        }

        if (count($newdata) > 0)
        {
            foreach ($newdata as $key => $val)
            {
                $flashdata_key = $this->flashdata_key.':new:'.$key;
                $this->set_userdata($flashdata_key, $val);
            }
        }
    }

正如我在评论中所说


您正在获取阵列,因为您正在设置闪存错误消息 作为数组[
$error=array('error'=>
$this->upload->display_errors();
],尝试将其设置为一个字符串

如果查看源代码中的函数,它要么接受哈希数组,要么接受字符串。
如果传递了一个数组,那么它将使用键将flashdata设置为FlashMessage类型,message设置为value;忽略第二个参数。
如果将两个参数作为字符串传递,它将使用第一个字符串设置flashdata键

也可以这样做

$this->session->set_flashdata('error', 'something went wrong');

源代码:

function set_flashdata($newdata = array(), $newval = '')
    {
        if (is_string($newdata))
        {
            $newdata = array($newdata => $newval);
        }

        if (count($newdata) > 0)
        {
            foreach ($newdata as $key => $val)
            {
                $flashdata_key = $this->flashdata_key.':new:'.$key;
                $this->set_userdata($flashdata_key, $val);
            }
        }
    }

我建议使用form_validation的validation_errors()。我是这样做的。
请查看中的库。
此库有两种方法验证上传(它只检查文件是否有效)
和do_upload(仅当validate_upload返回true时才必须使用)

Codeigniter中有一个文件上载库,这是文档。 复制我答案的代码并将其粘贴到名为my_Upload.php的文件中,然后将该文件保存在application/code文件夹中。 现在我定义了这样一个规则

$this->form_validation->set_rules('userfile', 'New Image', 'trim|callback_valid_upload');   
当图像上传是可选的时,您可以将其包装在一个条件中

if(isset($_FILES['userfile']) AND $_FILES['userfile']['name']!= ''){
    $this->form_validation->set_rules('userfile', 'New Image', 'trim|callback_valid_upload');   
}   
其中userfile是表单的文件字段。 您可以看到我在规则回调\u valid\u upload中调用了一个函数
下面是回调中使用的控制器方法

public function valid_upload()
{
    $this->load->library('upload'); 

    $config['upload_path']      =   'your path here';           
    $config['allowed_types']    =   'png';
    $config['max_size']         =   2048;
    $config['max_width']        =   85;
    $config['max_height']       =   110;

    $this->upload->initialize($config);

    if (!$this->upload->validate_upload('userfile'))
    {
        $this->form_validation->set_message('valid_upload', $this->upload->display_errors());
        return FALSE;
    }else{
        return TRUE;
    }       
}
此方法将检查我们正在上载的文件是否有效,并在成功时返回true,否则返回false。
验证失败时,加载表单

View

echo validation_errors();
//blah blah
//<form action="">
//  <input type="" />
//  <input type="" />
//  <input type="" />
//</form>
更多编辑:
我注意到您的代码中有一个问题

   $config = array(); 
   $config['base_url'] = 'http://localhost/thexxr.com/Booksetups/book/pgn/';
   $config["total_rows"] = $this->Booksmodel->record_count(); 
   $config['uri_segment'] = 4; 
   $config['per_page'] = 5;  
   $config['full_tag_open'] = '<div id="pagination">';
   $config['full_tag_close'] = '</div>';

    $this->load->library('upload', $config);
    $this->upload->do_upload("img1");

    unset($config);

    $config['upload_path'] = 'uploads/'; 
    $config['allowed_types'] = 'gif|jpg|jpeg|png'; 
    $config['max_size'] = '1000'; 
    $config['max_width'] = '1920'; 
    $config['max_height'] = '1280'; 
    $config['remove_spaces'] = 'TRUE'; 
    $config['file_path'] = 'TRUE'; 
    $config['full_path']    = '/uploads/';

    $this->load->library('upload', $config); //load again with new configuration
    $this->upload->do_upload("img1");
    $this->upload->do_upload("img2");   
$config=array();
$config['base_url']='http://localhost/thexxr.com/Booksetups/book/pgn/';
$config[“总计行数”]=$this->Booksmodel->record_count();
$config['uri_segment']=4;
$config['per_page']=5;
$config['full_tag_open']='';
$config['full_tag_close']='';
$this->load->library('upload',$config);
$this->upload->do_upload(“img1”);
未设置($配置);
$config['upload_path']=“uploads/”;
$config['allowed_types']='gif | jpg | jpeg | png';
$config['max_size']='1000';
$config['max_width']='1920';
$config['max_height']='1280';