Fixed the issue that dots in URL rules would match any character.

framework/yii/web/UrlRule.php

@@ -156,6 +156,7 @@ class UrlRule extends Object
 				}
 			}
 		}
+		$tr['.'] = '\\.';
 
 		$this->_template = preg_replace('/<(\w+):?([^>]+)?>/', '<$1>', $this->pattern);
 		$this->pattern = '#^' . trim(strtr($this->_template, $tr), '/') . '$#u';

tests/unit/framework/web/UrlRuleTest.php

@@ -380,6 +380,17 @@ class UrlRuleTest extends TestCase
 				),
 			),
 			array(
+				'with dot', // https://github.com/yiisoft/yii/issues/2945
+				array(
+					'pattern' => 'posts.html',
+					'route' => 'post/index',
+				),
+				array(
+					array('posts.html', 'post/index'),
+					array('postsahtml', false),
+				),
+			),
+			array(
 				'creation only',
 				array(
 					'pattern' => 'posts',