Updates cloudsql example to align better with docs (GoogleCloudPlatform#661)

Author: bshaffer

appengine/php72/cloudsql/app-postgres.yaml

@@ -1,15 +1,9 @@
 # This app.yaml is for deploying to instances of Cloud SQL running PostgreSQL.
 # See the default app.yaml for running Cloud SQL with MySQL.
 
+# [START gae_cloudsql_postgres_env]
 runtime: php72
 
-# Defaults to "serve index.php" and "serve public/index.php". Can be used to
-# serve a custom PHP front controller (e.g. "serve backend/index.php") or to
-# run a long-running PHP script as a worker process (e.g. "php worker.php").
-#
-# entrypoint: serve index.php
-
-# [START gae_cloudsql_postgres_env]
 env_variables:
   # Replace USER, PASSWORD, DATABASE, and CONNECTION_NAME with the
   # values obtained when configuring your Cloud SQL instance.

appengine/php72/cloudsql/app.yaml

@@ -1,15 +1,9 @@
 # This app.yaml is for deploying to instances of Cloud SQL running MySQL.
 # See app-postgres.yaml for running Cloud SQL with PostgreSQL.
 
+# [START gae_cloudsql_mysql_env]
 runtime: php72
 
-# Defaults to "serve index.php" and "serve public/index.php". Can be used to
-# serve a custom PHP front controller (e.g. "serve backend/index.php") or to
-# run a long-running PHP script as a worker process (e.g. "php worker.php").
-#
-# entrypoint: serve index.php
-
-# [START gae_cloudsql_mysql_env]
 env_variables:
   # Replace USER, PASSWORD, DATABASE, and CONNECTION_NAME with the
   # values obtained when configuring your Cloud SQL instance.

appengine/php72/cloudsql/index.php

@@ -27,9 +27,9 @@
 # [START gae_cloudsql_example]
 // Create the PDO object to talk to CloudSQL. Use the following variables:
 //
-// $dsn = "mysql:dbname=DATABASE;unix_socket=/cloudsql/CONNECTION_NAME";
-// $user = 'YOUR_CLOUDSQL_USER';
-// $password = 'YOUR_CLOUDSQL_PASSWORD';
+//     $dsn = "mysql:dbname=DATABASE;unix_socket=/cloudsql/CONNECTION_NAME";
+//     $user = 'YOUR_CLOUDSQL_USER';
+//     $password = 'YOUR_CLOUDSQL_PASSWORD';
 //
 // If the unix socket is unavailable, try to connect using TCP. This will work
 // if you're running a local MySQL server or using the Cloud SQL proxy, for example:
@@ -38,7 +38,9 @@
 //
 // This will mean your DSN for connecting locally to Cloud SQL would look like this:
 //
-// $dsn = "mysql:dbname=DATABASE;host=127.0.0.1";
+//     $dsn = "mysql:dbname=DATABASE;host=127.0.0.1";
+//
+// For PostgreSQL examples see `app-postgres.yaml`
 //
 $db = new PDO($dsn, $user, $password);
 
@@ -59,6 +61,10 @@
 // Query existing guestbook entries.
 $results = $db->query('SELECT * from entries');
 
+// Now you can use the PDOStatement object to print or iterate over the results:
+//
+//     var_dump($results->fetchAll(PDO::FETCH_ASSOC));
+//
 # [END gae_cloudsql_example]
 ?>