Easy way to test services with this file

easy_healthcheck.php

<?php

$redis_server="";
$redis_port="";
$redis_connetion_timeout="5";
$redis_test_key="redis_check";
$redis_test_value="";

$mysql_server="";
$mysql_user="";
$mysql_password="";
$mysql_dbname="";
$mysql_test_tablename="mysql_check"; //will be created as test table and then dropped
$mysql_test_record=""; //will be inserted to test table


$redis = new Redis();
if (!$redis->connect($redis_server, $redis_port, $redis_connetion_timeout)) {
		header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
		die("REDIS OPEN CONNECTION: ERROR "."<br>"."\n");
} else {
		echo "REDIS OPEN CONNECTION: OK"."<br>"."\n";
}

if (!$redis->ping()) {
		header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
		die("REDIS PING: ERROR"."<br>"."\n");
} else {
		echo "REDIS PING: OK"."<br>"."\n";
}

if (!$redis->set($redis_test_key, $redis_test_value)) {
		header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
		die("REDIS SET KEY: ERROR"."<br>"."\n");
} else {
		echo "REDIS SET KEY: OK"."<br>"."\n";
}

if (!$redis->exists($redis_test_key)) {
		header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
		die("REDIS CHECK KEY EXISTS: ERROR"."<br>"."\n");
} else {
		echo "REDIS CHECK KEY EXISTS: OK"."<br>"."\n";
}

if (!($redis_check = $redis->get($redis_test_key))) {
		header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
		die("REDIS GET KEY: ERROR"."<br>"."\n"); 
} else {
		if (!($redis_test_value == $redis_check)) {
				header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
				die("REDIS COMPARE KEY: ERROR"."<br>"."\n");
		}
		echo "REDIS GET AND COMPARE KEY: OK"."<br>"."\n";
}

if (!$redis->delete($redis_test_key)) {
		header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
		die("REDIS DELETE KEY: ERROR"."<br>"."\n");
} else {
		echo "REDIS DELETE KEY: OK"."<br>"."\n";
}

if (!$redis->close()) {
		header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
		die("REDIS CLOSE CONNECTION: ERROR"."<br>"."\n");
} else {
		echo "REDIS CLOSE CONNECTION: OK"."<br><br><br>"."\n";
}

if (!$mysql_link=mysqli_connect($mysql_server,$mysql_user,$mysql_password,$mysql_dbname)) {
		header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
		die("MYSQL OPEN CONNECTION: ERROR ".mysqli_connect_error()."<br>"."\n");
} else {
		echo "MYSQL OPEN CONNECTION: OK"."<br>"."\n";
}

if (!mysqli_select_db($mysql_link,$mysql_dbname)) {
		header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
    	die("MYSQL DB CONNECTION: ERROR ["."Could not open the db '$dbname'"."]<br>"."\n");
} else {
      echo "MYSQL DB CONNECTION: OK"."<br>"."\n";
}

$sql="CREATE TABLE `".$mysql_test_tablename."` (`check_text` varchar(70) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;";
if(!mysqli_query($mysql_link,$sql)){
		header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
    	die("MYSQL TEST TABLE CREATION: ERROR [  ".mysqli_error($mysql_link)."  ]<br>"."\n");
} else {
    	echo "MYSQL TEST TABLE CREATION: OK"."<br>"."\n";
}

$sql = "INSERT INTO `".$mysql_test_tablename."` (`check_text`) VALUES ('".$mysql_test_record."')";
if(!mysqli_query($mysql_link,$sql)){
		header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
    	die("MYSQL TEST RECORD INSERT: ERROR [  ". mysqli_error($mysql_link)."  ]<br>"."\n");
} else {
      echo "MYSQL TEST RECORD INSERT: OK"."<br>"."\n";
}

$sql = "SELECT * FROM `".$mysql_test_tablename."`";
if(!$result = mysqli_query($mysql_link,$sql)){
		  header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
    	die("MYSQL TEST RECORD SELECT: ERROR [  ". mysqli_error($mysql_link)."  ]<br>"."\n");
} else {
		$array = array();
		while($row = mysqli_fetch_array($result)){$array[]=$row;}
			if($array[0][0] != $mysql_test_record){
					header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
    				die("MYSQL COMPARE TEST RECORD: ERROR [ TEST RECORD NOT VALID ]<br>"."\n");
    		}
		  mysqli_free_result($result);
    	echo "MYSQL TEST RECORD SELECT AND COMPARE: OK"."<br>"."\n";
}


$sql = "DELETE FROM `".$mysql_test_tablename."` WHERE `check_text`='".$mysql_test_record."';";
if(!mysqli_query($mysql_link,$sql)){
		  header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
    	die("MYSQL TEST RECORD DELETE: ERROR [  ". mysqli_error($mysql_link)."  ]<br>"."\n");
} else {
      echo "MYSQL TEST RECORD DELETE: OK"."<br>"."\n";
}

$sql="DROP TABLE `".$mysql_test_tablename."`;";
if(!mysqli_query($mysql_link,$sql)){
		header($_SERVER['SERVER_PROTOCOL'] . ' 503 Internal Server Error', true, 503);
		die("MYSQL TEST TABLE DROP: ERROR [  ".mysqli_error($mysql_link)."  ]<br>"."\n");
} else {
		echo "MYSQL TEST TABLE DROP: OK"."<br>"."\n";
}

$mysqli_close($mysql_link);

?>