Clase test para probar la conexion a base de datos postgres

Postgres_Conecttion_Test_class

<?php
/**
 * Clase creada con la intencion de realizar pruebas de conexion
 * a base de datos Postgres
 *
 * User: Albert Eduardo Hidalgo Taveras
 * Date: 16/1/2019
 * Time: 11:16 AM
 */

namespace Core\Util\PgConecttionTest;


class PgConectionTest
{
    private $userName;
    private $password;
    private $host;
    private $dbName;
    private $schema;
    private $dbConection;

    /**
     * @return mixed
     */
    public function getDbConection()
    {
        return $this->dbConection;
    }

    /**
     * @param mixed $dbConection
     */
    public function setDbConection($dbConection): void
    {
        $this->dbConection = $dbConection;
    }

    public function __construct($userName,$password,$host,$dbName,$schema)
    {
        $this->userName = $userName;
        $this->password = $password;
        $this->host = $host;
        $this->dbName = $dbName;
        $this->schema = $schema;
    }

    /**
     * Verifica que las credenciales de conexion sean validas
     * @return string
     */
    public function validDataBaseCredentials(){
        $this->setDbConection(
            pg_connect ("host=$this->host dbname=$this->dbName user=$this->userName password=$this->password")
        );
        if($this->getDbConection()) {
            return 'OK';
        } else {
            return 'ERROR';
        }
    }

    /**
     * Consulta el objeto pg_database para saber si
     * la base de datos existe
     * @return string
     */
    public function checkIsDBExists(){
        $result = pg_query_params($this->dbConection,
            'SELECT exists(SELECT 1 FROM pg_database WHERE datname = $1)', array($this->dbName));

        $result = pg_fetch_assoc($result);
        if($result['exists'] == 't'){
            return 'OK';
        }else{
            return 'NO EXITS';
        }
    }

    /**
     * Verifica que un esquema exista
     * @return string
     */
    public function checkIsSchemaExists(){
        $result = pg_query_params($this->dbConection,
            'SELECT exists(select schema_name FROM information_schema.schemata WHERE schema_name = $1);', array($this->schema));

        $result = pg_fetch_assoc($result);
        if($result['exists'] == 't'){
            return 'OK';
        }else{
            return 'NO EXITS';
        }
    }
}