Fixes #15216: Added yii\web\ErrorHandler::$traceLine to allow opening file at line clicked in IDE

framework/web/ErrorHandler.php

@@ -70,6 +70,16 @@ class ErrorHandler extends \yii\base\ErrorHandler
      */
     public $displayVars = ['_GET', '_POST', '_FILES', '_COOKIE', '_SESSION'];
 
+    /**
+     * @var string placeholders to be be substituted.
+     * The placeholders are {file}, {line} and {text} and the string should be as follows.
+     *
+     * `File: {file} - Line: {line} - Text: {text}`
+     *
+     * @example <a href="netbeans://open?file={file}&line={line}">{html}</a>
+     * @since 2.0.14
+     */
+    public $traceLine = '{html}';
 
     /**
      * Renders the exception.