I don't see any complications when adding bootstrap to **toastr** but your code does have some problems:

1. First and foremost, if you're going to share code, please try to include the necessary libraries to actually run it.  You can use my example below, or the instructions on the [tag:toastr] tag.
2. `toastr options = {` should have a period to access the `options` property on the `toastr` object, like this: `toastr.options = {`
3. Same thing for `toastr-success('The...` which should use a period, not a hyphen to call the success method like this: `toastr.success('The...`
4. If you automatically escape `<strong>` into `&lt;strong&gt;` then there is no possible chance it will be rendered as html.  **It's already been escaped!**  So you need to include the brackets as you would regular html and then tell toastr to [not escape it][1] like this: `toastr.options.escapeHtml = false;`

Here's a working demo in Stack Snippets - please use this as a future template when asking questions so people can see where the actual problems are in your code.

[1]: https://github.com/CodeSeven/toastr#escape-html-characters





    toastr.options = {
      "closeButton": false,
      "debug": false,
      "newestOnTop": false,
      "progressBar": true,
      "positionClass": "toast-top-center",
      "preventDuplicates": false,
      "onclick": null,
      "showDuration": "300",
      "hideDuration": "1000",
      "timeOut": "5000",
      "extendedTimeOut": "1000",
      "showEasing": "swing",
      "hideEasing": "linear",
      "showMethod": "fadeIn",
      "hideMethod": "fadeOut",
      "escapeHtml": false
    }

    toastr.success('The <strong>User</strong> record has been successfully updated.', 'Record Updated.');



    <link href="//cdnjs.cloudflare.com/ajax/libs/toastr.js/2.1.2/toastr.css" rel="stylesheet"/>
    <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.js"></script>
    <script src="http://cdnjs.cloudflare.com/ajax/libs/toastr.js/latest/js/toastr.js"></script>

    <link href="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/css/bootstrap.css" rel="stylesheet"/>
    <script src="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.js"></script>

I use it in my php function, and now I get a error in php I think thats te problem, ( SyntaxError: missing ; before statement line 133 ) my php function is : 





    <?php
    function VISION_TO_REPORT_MESSAGES($report_tag = "test", $subject_parameters = '', $message_parameters = '', $output=true, $lang = '')
    {
    // action report messages templates ...
    	$report_tag = strtolower(trim($report_tag));
    if (strlen($report_tag))
    {        

    		$report_message = array();
    		$db = new clsDBcms();
            $SQL = " SELECT * FROM report_messages WHERE  report_tag= " . $db->ToSQL($report_tag, ccsText) . " LIMIT 1 ";		
           $db->query($SQL);
        $Result = $db->next_record();
        if ($Result)
    	{
    		$report_message['lang'] = $db->f("lang");
    		if(function_exists("VISION_TO_TRANSLATE"))
    		{
    		$report_message['subject'] = VISION_TO_MULTI_CONTENT($db->f("subject"),$lang);
    		$report_message['message'] = VISION_TO_MULTI_CONTENT($db->f("message"),$lang);
    		}
    		else
    		{
    		$report_message['subject'] = $db->f("subject");
    		$report_message['message'] = $db->f("message");
    		}

    		$report_message['css'] = $db->f("css");
    		$report_message['redirect_to'] = $db->f("redirect_to");
    		$report_message['type'] = $db->f("type");

    			if(!empty($subject_parameters))
    			{
    			while (list($this_tag,$value) = each($subject_parameters))
    			$report_message['subject']  = preg_replace("/".$this_tag."/i", $value, $report_message['subject']);
    			}

    			if(!empty($message_parameters))
    			{
    			while (list($this_tag,$value) = each($message_parameters))
    			$report_message['message']  = preg_replace("/".$this_tag."/i", $value, $report_message['message']);
    			}
    		}
            $db->close();
    		if($output == true && isset($report_message['message']))
    		//$output = '<script type="text/javascript">';
    		$output = 'toastr.options ={ 
    		  "closeButton": false,
    			"debug": false,
    			"newestOnTop": false,
    			"progressBar": true,
    			"positionClass": "toast-top-center",
    			"preventDuplicates": false,
    			"onclick": null,
    			"showDuration": "300",
    			"hideDuration": "1000",
    			"timeOut": "5000",
    			"extendedTimeOut": "1000",
    			"showEasing": "swing",
    			"hideEasing": "linear",
    			"showMethod": "fadeIn",
    			"hideMethod": "fadeOut",
    			}';
    		$output .=  'toastr.' . $report_message['css'] . "('" . str_replace("'", "\\'", htmlentities($report_message['message'])) . "'" . (isset($report_message['subject']) ? ", '" . str_replace("'", "\\'", htmlentities($report_message['subject'])) . "'" : null) . ');';
            return $output;
        }		
    	}
    ?>




line 133 in my html is   :

toastr.success('The User record has been successfully updated.', 'Record Updated.');

In THE head of my page I use :



    <link href="//cdnjs.cloudflare.com/ajax/libs/toastr.js/2.1.2/toastr.css" rel="stylesheet"/>
    <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.js"></script>
    <script src="http://cdnjs.cloudflare.com/ajax/libs/toastr.js/latest/js/toastr.js"></script>

    <link href="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/css/bootstrap.css" rel="stylesheet"/>
    <script src="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.js"></script>