Investigate connecting to PostgreSQL (early test)

I think it might be cleaner to split DB-specific code into separate packages.

test.php

@@ -0,0 +1,21 @@
+<?php
+
+use PeachySQL\Test\src\DbConnector;
+use Ramsey\Uuid\Uuid;
+
+require 'test/bootstrap.php';
+
+$conn = DbConnector::getPgsqlConn();
+
+$sql = "INSERT INTO Users (name, dob, weight, isDisabled)
+    VALUES ($1, $2, $3, $4)";
+
+$result = pg_query_params($conn, $sql, ['George McFly', '1938-04-01', 133.8, true]);
+
+if (!$result) {
+    echo 'Failed to insert row: ' . pg_last_error($conn) . "\n";
+} else {
+    echo 'Successfully inserted row!';
+}
+
+DbConnector::deleteTestTables();

test/src/Config.php

@@ -39,6 +39,26 @@ public function getMysqlDatabase(): string
         return 'PeachySQL';
     }
 
+    public function getPgsqlHost(): string
+    {
+        return 'localhost';
+    }
+
+    public function getPgsqlDatabase(): string
+    {
+        return 'PeachySQL';
+    }
+
+    public function getPgsqlUser(): string
+    {
+        return 'postgres';
+    }
+
+    public function getPgsqlPassword(): string
+    {
+        return '';
+    }
+
     public function getSqlsrvServer(): string
     {
         return '(local)\SQLEXPRESS';

test/src/DbConnector.php

@@ -6,11 +6,13 @@
 
 use Exception;
 use mysqli;
+use PgSql\Connection;
 
 class DbConnector
 {
     private static Config $config;
     private static ?mysqli $mysqlConn = null;
+    private static ?Connection $pgsqlConn = null;
 
     /**
      * @var resource|null
@@ -43,6 +45,25 @@ public static function getMysqlConn(): mysqli
         return self::$mysqlConn;
     }
 
+    public static function getPgsqlConn(): Connection
+    {
+        if (!self::$pgsqlConn) {
+            $c = self::getConfig();
+            $connStr = "host={$c->getPgsqlHost()} dbname={$c->getPgsqlDatabase()} "
+                . "user={$c->getPgsqlUser()} password={$c->getPgsqlPassword()}";
+            $conn = pg_connect($connStr);
+
+            if (!$conn) {
+                throw new Exception('Failed to connect to PostgreSQL');
+            }
+
+            self::$pgsqlConn = $conn;
+            self::createPgsqlTestTable(self::$pgsqlConn);
+        }
+
+        return self::$pgsqlConn;
+    }
+
     /**
      * @return resource
      */
@@ -97,6 +118,22 @@ private static function createMysqlTestTable(mysqli $conn): void
         }
     }
 
+    private static function createPgsqlTestTable(Connection $conn): void
+    {
+        $sql = 'CREATE TABLE Users (
+                    user_id SERIAL PRIMARY KEY,
+                    name VARCHAR(50) NOT NULL,
+                    dob DATE NOT NULL,
+                    weight REAL NOT NULL,
+                    isDisabled BOOLEAN NOT NULL,
+                    uuid bytea NULL
+                );';
+
+        if (!pg_query($conn, $sql)) {
+            throw new Exception('Failed to create PostgreSQL test table: ' . pg_last_error($conn));
+        }
+    }
+
     public static function deleteTestTables(): void
     {
         $sql = 'DROP TABLE Users';
@@ -107,6 +144,12 @@ public static function deleteTestTables(): void
             }
         }
 
+        if (self::$pgsqlConn) {
+            if (!pg_query(self::$pgsqlConn, $sql)) {
+                throw new Exception('Failed to drop PostgreSQL test table: ' . pg_last_error(self::$pgsqlConn));
+            }
+        }
+
         if (self::$sqlsrvConn) {
             if (!sqlsrv_query(self::$sqlsrvConn, $sql)) {
                 throw new Exception('Failed to drop SQL Server test table: ' . print_r(sqlsrv_errors(), true));