system/Database/Postgre/Connection.php
public function connect(bool $persistent = false)
	{
		if (empty($this->DSN))
		{
			$this->buildDSN();
		}

		// Strip pgsql if exists
		if (mb_strpos($this->DSN, 'pgsql:') === 0)
		{
			$this->DSN = mb_substr($this->DSN, 6);
		}

		// Convert semicolons to spaces.
		$this->DSN = str_replace(';', ' ', $this->DSN);

		$this->connID = $persistent === true ? pg_pconnect($this->DSN) : pg_connect($this->DSN);

		if ($this->connID !== false)
		{
			if ($persistent === true && pg_connection_status($this->connID) === PGSQL_CONNECTION_BAD && pg_ping($this->connID) === false
			)
			{
				return false;
			}

			empty($this->schema) || $this->simpleQuery("SET search_path TO {$this->schema},public");

			if ($this->setClientEncoding($this->charset) === false)
			{
				return false;
			}
		}

		return $this->connID;
	}
public function connect(bool $persistent = false)
	{
		if (empty($this->DSN))
		{
			$this->buildDSN();
		}

		// Strip pgsql if exists
		if (mb_strpos($this->DSN, 'pgsql:') === 0)
		{
			$this->DSN = mb_substr($this->DSN, 6);
		}

		// Convert semicolons to spaces.
		$this->DSN = str_replace(';', ' ', $this->DSN);

		$this->connID = $persistent === true ? pg_pconnect($this->DSN) : pg_connect($this->DSN);

		if ($this->connID !== false)
		{
			if ($persistent === true && pg_connection_status($this->connID) === PGSQL_CONNECTION_BAD && pg_ping($this->connID) === false
			)
			{
				return false;
			}

			empty($this->schema) || $this->simpleQuery("SET search_path TO {$this->schema},public");

			if ($this->setClientEncoding($this->charset) === false)
			{
				return false;
			}
		}

		return $this->connID;
	}
Connect to the database.

@param  boolean $persistent
@return mixed