Connect to multiple MySQL servers in a for and foreach loop

Suppose you want to check the connectivity of multiple MySQL servers, and connect to the servers in a loop. Here are two example code snippets. One that uses a for loop and one using a foreach loop.

Connect to multiple MySQL servers in a foreach loop

function checkMysql() {
	$mysql_nodes = array(
		"server-01",
		"server-02",
		"server-03",
		"server-04",
		"server-05",
		"server-06",
		"server-07",
		"server-08",
		"server-09",
		"server-10",
		"server-11"
		);
	foreach ($mysql_nodes as $mysql_node) {
		$mysqli = new mysqli($mysql_node, "username", "passw0rd", "database");
		if($result = $mysqli->query("SHOW TABLES")) {
			echo $mysql_node. "checked";
			mysqli_free_result($result);
		}
		$mysqli->close();
	}
}

Connect to multiple MySQL servers in a for loop

function checkMysql() {
	$mysql_nodes = array(
		"server-01",
		"server-02",
		"server-03",
		"server-04",
		"server-05",
		"server-06",
		"server-07",
		"server-08",
		"server-09",
		"server-10",
		"server-11"
	);
	for ($i = 0; $i < sizeof($mysql_nodes); ++$i) {
		$mysqli = new mysqli($mysql_node, "username", "passw0rd", "database");
		if($result = $mysqli->query("SHOW TABLES")) {
			echo $mysql_node. "checked";
			mysqli_free_result($result);
		}
		$mysqli->close();
	}
}