added PHP 7.3 to Travis matrix, added PHP 5.3 back as allowed failure, dropped HHVM as PHPUnit no longer works on it, added Makefile with multiple PHP version composer update and phpunit commands, added docker-compose with from PHP 5.4 up to 7.3 (5.4 from custom Dockerfile, 5.3 is not available due to lack of the mbstring extension), added hirak/prestissimo for faster dependency installation, fixed phpunit.xml issues reported with the latest version, resolved the issue with expectException() on PHP 7.3

Author: thunderer

.travis.yml

@@ -1,12 +1,14 @@
 language: php
 
 php:
+  - 5.3
   - 5.4
   - 5.5
   - 5.6
   - 7.0
   - 7.1
   - 7.2
+  - 7.3
   - hhvm
   - nightly
 
@@ -24,5 +26,7 @@ after_script:
 
 matrix:
   allow_failures:
+    - php: 5.3
+    - php: hhvm
     - php: nightly
     - php: hhvm

Makefile

@@ -0,0 +1,10 @@
+PHP ?= 7.2
+
+composer-update:
+	docker-compose run --rm composer composer config platform.php ${PHP}
+	docker-compose run --rm composer composer update
+	docker-compose run --rm composer composer config --unset platform
+
+test:
+	docker-compose run --rm php-${PHP} php -v
+	docker-compose run --rm php-${PHP} php /app/vendor/bin/phpunit -c /app/phpunit.xml.dist

docker-compose.yaml

@@ -0,0 +1,19 @@
+version: '3'
+
+services:
+
+  composer:
+    image: 'composer:1.6'
+    volumes: ['.:/app']
+
+  # FIXME: PHP 5.3 contains neither mbstring extension nor docker-php-ext-install script
+  # Original Dockerfile can be found here https://github.com/docker-library/php/pull/20/files
+  # Unfortunately it fails to build now because GPG signatures do not exist anymore
+  # php-5.3: { build: 'docker/php-5.3', volumes: ['.:/app'] }
+  php-5.4: { build: 'docker/php-5.4', volumes: ['.:/app'] }
+  php-5.5: { image: 'php:5.5', volumes: ['.:/app'] }
+  php-5.6: { image: 'php:5.6', volumes: ['.:/app'] }
+  php-7.0: { image: 'php:7.0', volumes: ['.:/app'] }
+  php-7.1: { image: 'php:7.1', volumes: ['.:/app'] }
+  php-7.2: { image: 'php:7.2', volumes: ['.:/app'] }
+  php-7.3: { image: 'php:7.3', volumes: ['.:/app'] }

docker/php-5.4/Dockerfile

@@ -0,0 +1,3 @@
+FROM php:5.4
+
+RUN docker-php-ext-install mbstring

src/Shortcode/Shortcode.php

@@ -8,7 +8,7 @@ final class Shortcode extends AbstractShortcode implements ShortcodeInterface
 {
     public function __construct($name, array $parameters, $content, $bbCode = null)
     {
-        if(false === is_string($name) || (is_string($name) && !mb_strlen($name))) {
+        if(false === is_string($name) || (is_string($name) && !\mb_strlen($name))) {
             throw new \InvalidArgumentException('Shortcode name must be a non-empty string!');
         }