＆＃34;消息：未定义的属性：stdClass＆＃34; codeigniter控制器问题

Question

首先，我继承了此网站的代码，因此我无法搞清楚其中的一些内容。问题出在我们的博客页面创建上。当我尝试创建一个新的博客页面（使用管理站点）时，我在每个元素之前收到错误。它只出现在创建方面，在编辑方面工作正常。我还能够创建新帖子，它只是有通知。它大约24小时前工作，任何代码都没有改变。

The errors I'm getting are :   
> A PHP Error was encountered  
>Severity: Notice  
>Message: Undefined property: stdClass::$keywords    
>Filename: admin/form.php    
>Line Number: 94    

as well as:

> $title, Line Number: 28    
> $comments_enabled, line 122  
>$slug, line 33     
>$status, line 38     
>$body, line 53     
>$preview_hash, line 58

我已将它缩小到$ extra数组代码，似乎没有被读取（可能？）。这是我的创建功能：

public function create()
{

    // They are trying to put this live
    if ($this->input->post('status') == 'live')
    {
        role_or_die('blog', 'put_live');

        $hash = "";
    }
    else
    {
        $hash = $this->_preview_hash();
    }

    $post = new stdClass();

    // Get the blog stream.
    $this->load->driver('Streams');
    $stream = $this->streams->streams->get_stream('blog', 'blogs');
    $stream_fields = $this->streams_m->get_stream_fields($stream->id, $stream->stream_namespace);

    // Get the validation for our custom blog fields.
    $blog_validation = $this->streams->streams->validation_array($stream->stream_slug, $stream->stream_namespace, 'new');

    // Combine our validation rules.
    $rules = array_merge($this->validation_rules, $blog_validation);

    // Set our validation rules
    $this->form_validation->set_rules($rules);

    if ($this->input->post('created_on'))
    {
        $created_on = strtotime(sprintf('%s %s:%s', $this->input->post('created_on'), $this->input->post('created_on_hour'), $this->input->post('created_on_minute')));
    }
    else
    {
        $created_on = now();
    }

    if ($this->form_validation->run())
    {
        // Insert a new blog entry.
        // These are the values that we don't pass through streams processing.
        $extra = array(
            'title'            => $this->input->post('title'),
            'slug'             => $this->input->post('slug'),
            'category_id'      => $this->input->post('category_id'),
            'keywords'         => Keywords::process($this->input->post('keywords')),
            'body'             => $this->input->post('body'),
            'status'           => $this->input->post('status'),
            'created_on'       => $created_on,
            'created'          => date('Y-m-d H:i:s', $created_on),
            'comments_enabled' => $this->input->post('comments_enabled'),
            'author_id'        => $this->current_user->id,
            'type'             => $this->input->post('type'),
            'parsed'           => ($this->input->post('type') == 'markdown') ? parse_markdown($this->input->post('body')) : '',
            'preview_hash'     => $hash
        );  

        if ($id = $this->streams->entries->insert_entry($_POST, 'blog', 'blogs', array('created'), $extra))
        {
            $this->pyrocache->delete_all('blog_m');
            $this->session->set_flashdata('success', sprintf($this->lang->line('blog:post_add_success'), $this->input->post('title')));

            // Blog article has been updated, may not be anything to do with publishing though
            Events::trigger('post_created', $id);

            // They are trying to put this live
            if ($this->input->post('status') == 'live')
            {
                // Fire an event, we're posting a new blog!
                Events::trigger('post_published', $id);
            }
        }
        else
        {
            $this->session->set_flashdata('error', lang('blog:post_add_error'));
        }

        // Redirect back to the form or main page
        ($this->input->post('btnAction') == 'save_exit') ? redirect('admin/blog') : redirect('admin/blog/edit/'.$id);
    }
    else
    {
        // Go through all the known fields and get the post values
        $post = new stdClass;
        /* 
        ---------Gives array to string error without the if statement-------

        foreach ($this->validation_rules as $key => $field)
        {
            $post->$field['field'] = set_value($field['field']);
        }*/

        foreach ($this->validation_rules as $key => $field)
    {
        if (isset($_POST[$field['field']]))
        {
            $post->$field['field'] = set_value($field['field']);
        }
    } 

        $post->created_on = $created_on;

        // if it's a fresh new article lets show them the advanced editor
        $post->type or $post->type = 'wysiwyg-advanced';
    }

    // Set Values
    $values = $this->fields->set_values($stream_fields, null, 'new');

    // Run stream field events
    $this->fields->run_field_events($stream_fields, array(), $values);

    $this->template
        ->title($this->module_details['name'], lang('blog:create_title'))
        ->append_metadata($this->load->view('fragments/wysiwyg', array(), true))
        ->append_js('jquery/jquery.tagsinput.js')
        ->append_js('module::blog_form.js')
        ->append_js('module::blog_category_form.js')
        ->append_css('jquery/jquery.tagsinput.css')
        ->set('stream_fields', $this->streams->fields->get_stream_fields($stream->stream_slug, $stream->stream_namespace, $values))
        ->set('post', $post)
        ->build('admin/form');
}

$extra数组似乎无法读取。这些错误也是在数组到字符串错误的同时发生的。我希望修复它可以解决这两个问题，但到目前为止还没有好处。错误也来自两个来源。我在想，这可能是if语句没有被阅读？或者它可能与文件开头的$validation_rules有关？

这段代码是第一个失败的代码（对于$type），唯一一个通过实际的controller.php文件，其余的（关键字，标题，slug等）在form.php下失败文件。

$post->type or $post->type = 'wysiwyg-advanced';

感谢任何建议或帮助。我仍然是PHP和CodeIgniter的新手，但看起来它需要做很多工作才能彻底改造网站。

谢谢。

编辑：我在下面添加了我的编辑功能，也许其他人可以看到它的工作原理但不是我的创建功能。

    public function edit($id = 0)
{
    $id or redirect('admin/blog');

    $post = $this->blog_m->get($id);

    // They are trying to put this live
    if ($post->status != 'live' and $this->input->post('status') == 'live')
    {
        role_or_die('blog', 'put_live');
    }

    // If we have keywords before the update, we'll want to remove them from keywords_applied
    $old_keywords_hash = (trim($post->keywords) != '') ? $post->keywords : null;

    $post->keywords = Keywords::get_string($post->keywords);

    // If we have a useful date, use it
    if ($this->input->post('created_on'))
    {
        $created_on = strtotime(sprintf('%s %s:%s', $this->input->post('created_on'), $this->input->post('created_on_hour'), $this->input->post('created_on_minute')));
    }
    else
    {
        $created_on = $post->created_on;
    }

    // Load up streams
    $this->load->driver('Streams');
    $stream = $this->streams->streams->get_stream('blog', 'blogs');
    $stream_fields = $this->streams_m->get_stream_fields($stream->id, $stream->stream_namespace);

    // Get the validation for our custom blog fields.
    $blog_validation = $this->streams->streams->validation_array($stream->stream_slug, $stream->stream_namespace, 'new');

    $blog_validation = array_merge($this->validation_rules, array(
        'title' => array(
            'field' => 'title',
            'label' => 'lang:global:title',
            'rules' => 'trim|htmlspecialchars|required|max_length[100]|callback__check_title['.$id.']'
        ),
        'slug' => array(
            'field' => 'slug',
            'label' => 'lang:global:slug',
            'rules' => 'trim|required|alpha_dot_dash|max_length[100]|callback__check_slug['.$id.']'
        ),
    ));

    // Merge and set our validation rules
    $this->form_validation->set_rules(array_merge($this->validation_rules, $blog_validation));

    $hash = $this->input->post('preview_hash');

    if ($this->input->post('status') == 'draft' and $this->input->post('preview_hash') == '')
    {
        $hash = $this->_preview_hash();
    }
    //it is going to be published we don't need the hash
    elseif ($this->input->post('status') == 'live')
    {
        $hash = '';
    }

    if ($this->form_validation->run())
    {
        $author_id = empty($post->display_name) ? $this->current_user->id : $post->author_id;

        $extra = array(
            'title'            => $this->input->post('title'),
            'slug'             => $this->input->post('slug'),
            'category_id'      => $this->input->post('category_id'),
            'keywords'         => Keywords::process($this->input->post('keywords'), $old_keywords_hash),
            'body'             => $this->input->post('body'),
            'status'           => $this->input->post('status'),
            'created_on'       => $created_on,
            'updated_on'       => $created_on,
            'created'          => date('Y-m-d H:i:s', $created_on),
            'updated'          => date('Y-m-d H:i:s', $created_on),
            'comments_enabled' => $this->input->post('comments_enabled'),
            'author_id'        => $author_id,
            'type'             => $this->input->post('type'),
            'parsed'           => ($this->input->post('type') == 'markdown') ? parse_markdown($this->input->post('body')) : '',
            'preview_hash'     => $hash,
        );

        if ($this->streams->entries->update_entry($id, $_POST, 'blog', 'blogs', array('updated'), $extra))
        {
            $this->session->set_flashdata(array('success' => sprintf(lang('blog:edit_success'), $this->input->post('title'))));

            // Blog article has been updated, may not be anything to do with publishing though
            Events::trigger('post_updated', $id);

            // They are trying to put this live
            if ($post->status != 'live' and $this->input->post('status') == 'live')
            {
                // Fire an event, we're posting a new blog!
                Events::trigger('post_published', $id);
            }
        }
        else
        {
            $this->session->set_flashdata('error', lang('blog:edit_error'));
        }

        // Redirect back to the form or main page
        ($this->input->post('btnAction') == 'save_exit') ? redirect('admin/blog') : redirect('admin/blog/edit/'.$id);
    }

    // Go through all the known fields and get the post values
    foreach ($this->validation_rules as $key => $field)
    {
        if (isset($_POST[$field['field']]))
        {
            $post->$field['field'] = set_value($field['field']);
        }
    }

    $post->created_on = $created_on;

    // Set Values
    $values = $this->fields->set_values($stream_fields, $post, 'edit');

    // Run stream field events
    $this->fields->run_field_events($stream_fields, array(), $values);

    $this->template
        ->title($this->module_details['name'], sprintf(lang('blog:edit_title'), $post->title))
        ->append_metadata($this->load->view('fragments/wysiwyg', array(), true))
        ->append_js('jquery/jquery.tagsinput.js')
        ->append_js('module::blog_form.js')
        ->set('stream_fields', $this->streams->fields->get_stream_fields($stream->stream_slug, $stream->stream_namespace, $values, $post->id))
        ->append_css('jquery/jquery.tagsinput.css')
        ->set('post', $post)
        ->build('admin/form');
}

Edit2：我已经添加了发送大部分错误的整个form.php。

    <section class="title">
<?php if ($this->method == 'create'): ?>
    <h4><?php echo lang('blog:create_title') ?></h4>
<?php else: ?>
    <h4><?php echo sprintf(lang('blog:edit_title'), $post->title) ?></h4>
<?php endif ?>
</section>

<section class="item">
<div class="content">

<?php echo form_open_multipart() ?>

<div class="tabs">

    <ul class="tab-menu">
        <li><a href="#blog-content-tab"><span><?php echo lang('blog:content_label') ?></span></a></li>
        <?php if ($stream_fields): ?><li><a href="#blog-custom-fields"><span><?php echo lang('global:custom_fields') ?></span></a></li><?php endif; ?>
        <li><a href="#blog-options-tab"><span><?php echo lang('blog:options_label') ?></span></a></li>
    </ul>

    <!-- Content tab -->
    <div class="form_inputs" id="blog-content-tab">
        <fieldset>
            <ul>
                <li>
                    <label for="title"><?php echo lang('global:title') ?> <span>*</span></label>
                    <div class="input"><?php echo form_input('title', htmlspecialchars_decode($post->title), 'maxlength="100" id="title"') ?></div>
                </li>

                <li>
                    <label for="slug"><?php echo lang('global:slug') ?> <span>*</span></label>
                    <div class="input"><?php echo form_input('slug', $post->slug, 'maxlength="100" class="width-20"') ?></div>
                </li>

                <li>
                    <label for="status"><?php echo lang('blog:status_label') ?></label>
                    <div class="input"><?php echo form_dropdown('status', array('draft' => lang('blog:draft_label'), 'live' => lang('blog:live_label')), $post->status) ?></div>
                </li>

                <li class="editor">
                    <label for="body"><?php echo lang('blog:content_label') ?> <span>*</span></label><br>
                    <div class="input small-side">
                        <?php echo form_dropdown('type', array(
                            'html' => 'html',
                            'markdown' => 'markdown',
                            'wysiwyg-simple' => 'wysiwyg-simple',
                            'wysiwyg-advanced' => 'wysiwyg-advanced',
                        ), $post->type) ?>
                    </div>

                    <div class="edit-content">
                        <?php echo form_textarea(array('id' => 'body', 'name' => 'body', 'value' => $post->body, 'rows' => 30, 'class' => $post->type)) ?>
                    </div>
                </li>

            </ul>
        <?php echo form_hidden('preview_hash', $post->preview_hash)?>
        </fieldset>
    </div>

    <?php if ($stream_fields): ?>

    <div class="form_inputs" id="blog-custom-fields">
        <fieldset>
            <ul>

                <?php foreach ($stream_fields as $field) echo $this->load->view('admin/partials/streams/form_single_display', array('field' => $field), true) ?>

            </ul>
        </fieldset>
    </div>

    <?php endif; ?>

    <!-- Options tab -->
    <div class="form_inputs" id="blog-options-tab">
        <fieldset>
            <ul>

                <li>
                    <label for="category_id"><?php echo lang('blog:category_label') ?></label>
                    <div class="input">
                    <?php echo form_dropdown('category_id', array(lang('blog:no_category_select_label')) + $categories, @$post->category_id) ?>
                        [ <?php echo anchor('admin/blog/categories/create', lang('blog:new_category_label'), 'target="_blank"') ?> ]
                    </div>
                </li>

                <?php if ( !module_enabled('keywords')): ?>
                    <?php echo form_hidden('keywords'); ?>
                <?php else: ?>
                    <li>
                        <label for="keywords"><?php echo lang('global:keywords') ?></label>
                        <div class="input"><?php echo form_input('keywords', $post->keywords, 'id="keywords"') ?></div>
                    </li>
                <?php endif; ?>

                <li class="date-meta">
                    <label><?php echo lang('blog:date_label') ?></label>

                    <div class="input datetime_input">
                        <?php echo form_input('created_on', date('Y-m-d', $post->created_on), 'maxlength="10" id="datepicker" class="text width-20"') ?> &nbsp;
                        <?php echo form_dropdown('created_on_hour', $hours, date('H', $post->created_on)) ?> :
                        <?php echo form_dropdown('created_on_minute', $minutes, date('i', ltrim($post->created_on, '0'))) ?>
                    </div>
                </li>

                <?php if ( ! module_enabled('comments')): ?>
                    <?php echo form_hidden('comments_enabled', 'no'); ?>
                <?php else: ?>
                    <li>
                        <label for="comments_enabled"><?php echo lang('blog:comments_enabled_label');?></label>
                        <div class="input">
                            <?php echo form_dropdown('comments_enabled', array(
                                'no' => lang('global:no'),
                                '1 day' => lang('global:duration:1-day'),
                                '1 week' => lang('global:duration:1-week'),
                                '2 weeks' => lang('global:duration:2-weeks'),
                                '1 month' => lang('global:duration:1-month'),
                                '3 months' => lang('global:duration:3-months'),
                                'always' => lang('global:duration:always'),
                            ), $post->comments_enabled ? $post->comments_enabled : '3 months') ?>
                        </div>
                    </li>
                <?php endif; ?>
            </ul>
        </fieldset>
    </div>

</div>

<input type="hidden" name="row_edit_id" value="<?php if ($this->method != 'create'): echo $post->id; endif; ?>" />

<div class="buttons">
    <?php $this->load->view('admin/partials/buttons', array('buttons' => array('save', 'save_exit', 'cancel'))) ?>
</div>

<?php echo form_close() ?>

</div>
</section>

Answer 1

替换

$post->type or $post->type = 'wysiwyg-advanced';

与

$post->type = 'wysiwyg-advanced';

希望它有效..

Answer 2

在您的代码中：

$post->type or $post->type = 'wysiwyg-advanced';

PHP将首先评估$post->type，如果返回false，则将运行or语句的第二部分。由于PHP必须对其进行评估，因此它将尝试访问该属性，并且由于它未设置，因此解释器会抛出通知并假定它是错误的。

这样做的正确方法是：

if (!isset($post->type)) {
    $post->type = 'wysiwyg-advanced';
}
// Or in PHP 7:
$post->type = $post->type ?? 'nobody';