simplify the calling of snippets

vim/snippets/php.snippets

@@ -1,7 +1,7 @@
 # useful for debugging arrays
-snippet printpre
+snippet ppre
 	print_r('<pre>'); print_r($${1:check_variable}); exit;
-snippet vardump
+snippet vdump
 	var_dump($${1:check_variable}); exit;
-snippet printlog
+snippet plog
 	Logger::debug('${1:description} ' . print_r($${2:variable}, true);