MyBB Community Forums

When I clicked on install & active near the title of this plugin in ACP -> Plugins, the system said:

Fatal error: Call to a member function escape_string() on a non-object in /membri/yugiohspirits/inc/plugins/thread_restriction.php on line 233

And:

Parse error: syntax error, unexpected $end, expecting T_VARIABLE or T_DOLLAR_OPEN_CURLY_BRACES or T_CURLY_OPEN in /membri/yugiohspirits/inc/plugins/thread_restriction.php on line 41

What is the problem?

Complete code of plugin:

<?php

/**
 * Thread Restriction plugin
 * Copyright = © 2014 The_Dark
 * Author = The_Dark
 * Codding = The_Dark & murder
 * Version = 3.2
 * Special thanks to murder
 * Website: http://yugiohspirits.altervista.org/
 * License: http://www.mybb.com/about/license
 */




//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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if(!defined("IN_MYBB"))
{
    die("Direct initialization of this file is not allowed.<br /><br />Please make sure IN_MYBB is defined.");
}



if(my_strpos($_SERVER['PHP_SELF'], 'newthread.php'))
{
    global $templatelist;
    if(isset($templatelist))
    {
        $templatelist .= ',';
    }
    $templatelist .= 'threadrestrictionuser';
} 

// add hook
$plugins->add_hook("showthread_start", "thread_restriction_showthread_start");
$plugins->add_hook("newthread_start", "thread_restriction_newthread_start");






//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////







function thread_restriction_info()
{
    
     global $mybb, $db, $lang;

    $lang->load("thread_restriction", true);

    return array(
        "name"            => $lang->threadrestriction_info_name,
        "description"    => $lang->threadrestriction_info_desc,
        "website"        => "http://yugiohspirits.altervista.org/",
        "author"        => "The_Dark",
        "authorsite"    => "http://yugiohspirits.altervista.org/",
        "version"        => "3.2",
        "guid"             => "",
        "compatibility" => "18*" 
        );
}






//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////







function thread_restriction_install()

{
    //add templates
      global $db, $mybb, $templates, $lang;

     $lang->load("thread_restriction");

    
    // create settings
    $insertarray = array(
        'name' => 'threadrestriction', 
        'title' => $lang->threadrestriction_settinggroups_title, 
        'description' => $lang->threadrestriction_settinggroups_desc, 
        'disporder' => "5",
    );

    $gid = $db->insert_query("settinggroups", $insertarray);
    // add settings

    $setting0 = array(
        "name"            => "threadrestriction_threads",
        "title"            => $lang->threadrestriction_settings_threads,
        "description"    => $lang->threadrestriction_settings_threads_desc,
        "optionscode"    => "text",
        "value"            => "",
        "disporder"        => "1",
        "gid"            => intval($gid),
    );

    
    $db->insert_query("settings", $setting0);
    
    $setting1 = array(
        "name"            => "threadrestriction_banuser",
        "title"            => $lang->threadrestriction_settings_banuser,
        "description"    => $lang->threadrestriction_settings_banuser_desc,
        "optionscode"    => "text",
        "value"            => "",
        "disporder"        => "2",
        "gid"            => intval($gid),
    );

    $db->insert_query("settings", $setting1);
    
    $setting2 = array(
        "name"            => "threadrestriction_bangroups",
        "title"            => $lang->threadrestriction_settings_bangroups,
        "description"    => $lang->threadrestriction_settings_bangroups_desc,
        "optionscode"    => "text",
        "value"            => "",
        "disporder"        => "3",
        "gid"            => intval($gid),
    );

    $db->insert_query("settings", $setting2);

    $setting3= array(
        "name"            => "threadrestriction_user",
        "title"            => $lang->threadrestriction_settings_user,
        "description"    => $lang->threadrestriction_settings_user_desc,
        "optionscode"    => "textarea",
        "value"            => "",
        "disporder"        => "4",
        "gid"            => intval($gid),

        );

        $db->insert_query("settings", $setting3);

    
    
    rebuild_settings();   
                                      

}





//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////







function thread_restriction_is_installed()

{
    global $db, $lang, $mybb;

     $lang->load("thread_restriction");

    $query = $db->simple_select("settinggroups", "*", "name='threadrestriction'"); 
    $result = $db->fetch_array($query); 
    
    if(is_null($result)) { 
        return false; 
    }
    return true; 
}






//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////







function thread_restriction_uninstall()
{
    global $db;

    $db->delete_query("settinggroups", "name = 'threadrestriction'");
   $db->delete_query('settings', 'name IN ( \'threadrestriction_threads\',\'threadrestriction_banuser\',​\'threadrestriction_bangroups\',\'threadrestriction_user\')');
                                          
    rebuild_settings();
}






//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////






function thread_restriction_activate()

{
    $insert_array = array(
        'title'        => 'threadrestrictionuser',
        'template'    => $db->escape_string('<tr>
<td class="trow2"><strong>{$lang->treadrestriction_user}</strong></td>
<td class="trow2"><input type="text" class="textbox" name="threadrestrictionuser" size="40" maxlength="240" value="{$threadrestrictionuser}" tabindex="2" /></td>
</tr>'),
        'sid'        => '-1',
        'version'    => '',
        'dateline'    => TIME_NOW
    );
    $db->insert_query("templates", $insert_array);

    require_once MYBB_ROOT."/inc/adminfunctions_templates.php";

    find_replace_templatesets("newthread", "#" . preg_quote('{$description}') . "#i", '{$description}{$threadrestrictionuser}');

    
}






//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////






function thread_restriction_deactivate()

{    
    require_once MYBB_ROOT."/inc/adminfunctions_templates.php";

    find_replace_templatesets("newthread", "#" . preg_quote('{$threadrestrictionuser}') . "#i", '');
}







//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////







    function thread_restriction_showthread_start()
{
    global $db, $lang, $mybb, $templates, $post_errors, $thread, $tid, $forums, $fid, $uid, $threadrestriction, $threadrestrictionuser;

    $lang->load("thread_restriction");

    $tids = $mybb->settings['threadrestriction_threads'];
    $uids = $mybb->settings['threadrestriction_banuser'];
    $ugroups = $mybb->settings['threadrestriction_bangroups'];

    if(in_array($tid, explode(',', $tids)) && in_array($mybb->user['uid'], explode(',', $uids))) {
        error_no_permission();
    }

    if(in_array($tid, explode(',', $tids)) && in_array($mybb->user['usergroup'], explode(',', $ugroups))) {
        
        error_no_permission();
    }


} 









//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////









// News from version v3.1/v3.2 ban set by users in threads if are author of them

function thread_restriction_newthread_start()

{   
    global $db, $lang, $mybb, $templates, $post_errors, $thread, $tid, $forums, $fid, $uid, $threadrestriction, $threadrestrictionuser;

    $lang->load("thread_restriction");

    $uidss = $mybb->settings['threadrestriction_user'];

    if(($mybb->input['previewpost'] || $post_errors) && in_array($mybb->user['uid'], explode(',', $uidss)))
        
    {
        $threadrestrictionuser = htmlspecialchars_uni($mybb->input['threadrestrictionuser']);
    }
    else
    {
        $threadrestrictionuser = htmlspecialchars_uni($thread['threadrestrictionuser']);
    }
       
       eval("\$threadrestrictionuser = \"".$templates->get("threadrestrictionuser")."\";");


}

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?>

How fix this problem

You need to global $db in the thread_restriction_activate() function.