Update examples and readme

Author: trowski

README.md

@@ -33,14 +33,19 @@ Prepared statements and parameterized queries support named placeholders, as wel
 More examples can be found in the [`examples`](examples) directory.
 
 ```php
+use Amp\Postgres;
+use Amp\Postgres\ConnectionConfig;
+
 Amp\Loop::run(function () {
-    /** @var \Amp\Postgres\Pool $pool */
-    $pool = Amp\Postgres\pool("host=localhost user=postgres dbname=test");
+    $config = ConnectionConfig::fromString("host=localhost user=postgres dbname=test");
+
+    /** @var Postgres\Pool $pool */
+    $pool = Postgres\pool($config);
 
-    /** @var \Amp\Postgres\Statement $statement */
+    /** @var Postgres\Statement $statement */
     $statement = yield $pool->prepare("SELECT * FROM test WHERE id = :id");
 
-    /** @var \Amp\Postgres\ResultSet $result */
+    /** @var Postgres\ResultSet $result */
     $result = yield $statement->execute(['id' => 1337]);
     while (yield $result->advance()) {
         $row = $result->getCurrent();

examples/basic.php

@@ -6,12 +6,10 @@
 use Amp\Postgres;
 
 Amp\Loop::run(function () {
-    $host = 'localhost';
-    $port = Postgres\ConnectionConfig::DEFAULT_PORT;
-    $user = 'postgres';
+    $config = Postgres\ConnectionConfig::fromString('host=localhost user=postgres');
 
     /** @var \Amp\Postgres\Connection $connection */
-    $connection = yield Postgres\connect(new Postgres\ConnectionConfig($host, $port, $user));
+    $connection = yield Postgres\connect($config);
 
     /** @var \Amp\Postgres\ResultSet $result */
     $result = yield $connection->query('SHOW ALL');

examples/listen.php

@@ -7,11 +7,9 @@
 use Amp\Postgres;
 
 Loop::run(function () {
-    $host = 'localhost';
-    $port = Postgres\ConnectionConfig::DEFAULT_PORT;
-    $user = 'postgres';
+    $config = Postgres\ConnectionConfig::fromString('host=localhost user=postgres');
 
-    $pool = Postgres\pool(new Postgres\ConnectionConfig($host, $port, $user));
+    $pool = Postgres\pool($config);
 
     $channel = "test";
 

examples/multi-listen.php

@@ -8,11 +8,9 @@
 use Amp\Postgres;
 
 Loop::run(function () {
-    $host = 'localhost';
-    $port = Postgres\ConnectionConfig::DEFAULT_PORT;
-    $user = 'postgres';
+    $config = Postgres\ConnectionConfig::fromString('host=localhost user=postgres');
 
-    $pool = Postgres\pool(new Postgres\ConnectionConfig($host, $port, $user));
+    $pool = Postgres\pool($config);
 
     $channel1 = "test1";
     $channel2 = "test2";

examples/transaction.php

@@ -6,11 +6,9 @@
 use Amp\Postgres;
 
 Amp\Loop::run(function () {
-    $host = 'localhost';
-    $port = Postgres\ConnectionConfig::DEFAULT_PORT;
-    $user = 'postgres';
+    $config = Postgres\ConnectionConfig::fromString('host=localhost user=postgres');
 
-    $pool = Postgres\pool(new Postgres\ConnectionConfig($host, $port, $user));
+    $pool = Postgres\pool($config);
 
     yield $pool->query('DROP TABLE IF EXISTS test');