Add php and yaml modes

lisp/modes/php.el

@@ -0,0 +1,10 @@
+;;; php.el --- initializes PHP modes -*- lexical-binding: t; -*-
+;;; Commentary:
+;;; Code:
+
+(use-package php-mode
+  :if (executable-find "php")
+  :defer)
+
+(provide 'modes/php)
+;;; php.el ends here

lisp/modes/yaml.el

@@ -0,0 +1,15 @@
+;;; yaml.el --- Initializes YAML mode -*- lexical-binding: t; -*-
+;;; Commentary:
+;;; Code:
+
+(use-package yaml-mode
+  :ensure t
+  :defer
+  :config
+  (use-package flycheck-yamllint
+    :if (executable-find "yamllint")
+    :config
+    (flycheck-yamllint-setup)))
+
+(provide 'modes/yaml)
+;;; yaml.el ends here