Added link to official php installation instructions

eddiejaoude · eddiejaoude · commit 715f373248c2 · 2015-09-15T17:46:49.000+01:00
diff --git a/php/lesson1/tutorial.md b/php/lesson1/tutorial.md
@@ -6,7 +6,7 @@ title: Introduction to PHP
 ##### Requirements
 
 * 15 minutes
-* PHP installed - this is by default on most Operating Systems
+* PHP installed - this is by default on most Operating Systems. But if not, here are the official [installation instructions](http://php.net/manual/en/install.php)
 
 ##### Achievements
 
