Updated Error handling (markdown)

Error-handling.md

@@ -5,7 +5,7 @@ When control flow meet `throw` statement, program execution is immediately inter
 and Execution Error is raised with message passed to `throw` statement. 
 
 Example:
-```
+```php
 function divide(a: int, b: int) {
     if (b == 0) {
         throw "You are trying to divide by 0!";