I'm connecting to Mysql Database With following code. I'm using mysqli. But It's not connecting to mysql database.
define("HOST", "hostname");
define("USER", "username");
define("PASS", "password");
define("DB", "dbname");
$link = mysqli_connect(HOST, USER, PASS) or die("Couldn't make database connection.");
$db = mysqli_select_db($link, DB) or die("Couldn't select database");
Strange things is that when I delete or die("Couldn't make database connection.") and or die("Couldn't select database"); then it's connect to db. Why ? Is there anything I'm doing wrong ?
This is the proposed way to handle the situation:
if (mysqli_connect_error()) {
die('Connect Error (' . mysqli_connect_errno() . ') '
. mysqli_connect_error());
}
Related
<?php
/* die/exit operation*/
mysqli_connect('localhost','root','') or die ('The connection is lost');
echo 'connected';
?>
mysqli_connect or die functions working together fine in case of the both correct and incorrect host names.But no matter what username I am using,it is always showing 'connected'.Can anyone please tell me why it is happening?
I don't think your die statement will ever be reached.
mysql_connect is the alias for mysqli::connect and the object will be made.
$mysqli = new mysqli('localhost', 'my_user', 'my_password', 'my_db');
To get a connection failure:
if ($mysqli->connect_error) {
die('Connect Error (' . $mysqli->connect_errno . ') ' . $mysqli->connect_error);
}
When I press my submit button, I get an error saying :
ErrorTable 'form2.demo' doesn't exist
form2 is my database name which is created in phpmyadmin.
I am a new MAC user.
Below is my php code.
define('DB_NAME','form2');
define('DB_USER','root');
define('DB_PASSWORD','root');
define('DB_HOST','localhost:8888');
My ports are :
Apache : 8888
Msql : 8889
Full code is as below:
<?php
define('DB_NAME','form2');
define('DB_USER','root');
define('DB_PASSWORD','root');
define('DB_HOST','localhost:8889');
$link = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
if(!$link){
die('Could not connect :' . mysql_error());
}
$db_selected = mysql_select_db(DB_NAME, $link);
if(!$db_selected){
die('Can\'t use' . DB_NAME . ':' . mysql_error());
}
$value = $_POST['input1'];
$sql = "INSERT INTO demo (input1) VALUES ('$value')";
if(!mysql_query($sql)){
die('Error' . mysql_error());
}
mysql_close();
?>
Your problem have nothing to do with Mac. You have to show us more code. How the code in your form looks like? How you are sending stuff to database?
Let's assume that everything in code is set up properly. The main thing you have to check is if you actually have demo table in your database. Go to phpmyadmin and check it, if there is no table create it. You can use phpmyadmin to do that or do it via SQL query like that one
CREATE TABLE IF NOT EXISTS `form2`.`demo` ( `id` INT NOT NULL AUTO_INCREMENT , PRIMARY KEY (`id`));
Of course code above will create table with only ID column so you have to adjust it to your needs
DEFINE('DB_USERNAME', 'root');
DEFINE('DB_PASSWORD', '');
DEFINE('DB_HOST', 'localhost');
DEFINE('DB_DATABASE', 'customer');
$mysqli = new mysqli(DB_HOST, DB_USERNAME, DB_PASSWORD, DB_DATABASE);
if (mysqli_connect_error()) {
die('Connect Error ('.mysqli_connect_errno().') '.mysqli_connect_error());
}
echo 'Connected successfully.';
$mysqli->close();
Try the msqli library instead
I am using phpMyAdmin + MySQL.
I created a database and am now trying to make the connection in a PHP script. The curious thing is that connecting to the DB works, so I get the "Connected to MySQL server" message, but I when it comes to selecting the 'petfood' database, the script shows "DIED at selection".
Any idea why? Thanks, and here's my piece of code:
<?php
$user = 'localhost';
$pass = 'password';
$db_name = 'petfood';
$db_conn = new mysqli("localhost", $user, $pass, $db_name) or die("Cannot connect to DB");
echo "Connected to MySQL server";
mysql_select_db($db_name) or die("DIED at selection");
echo "Database Selected";
?>
Spot the difference:
$db_conn = new mysqli("localhost", $user, $pass, $db_name) or die("Cannot connect to DB");
^----
mysql_select_db($db_name) or die("DIED at selection");
^---
If you had proper debugging, you'd have been told about the problem:
mysql_select_db($db_name) or die(mysql_error());
^^^^^^^^^^^^^^
Never output a fixed (useless) error message when you can have the system TELL you what's wrong.
1: using mysql
$dbhandle = mysql_connect($hostname, $username, $password) or die("Unable to connect to MySQL");
mysql_select_db("examples",$dbhandle) or die("Could not select examples");
$query = "SELECT name FROM mytable" ;
$result = mysqli_query($query);
2: using mysqli
$link = mysqli_connect("myhost","myuser","mypassw","mybd") or die("Error " . mysqli_error($link));
$query = "SELECT name FROM mytable" ;
$result = mysqli_query($link, $query);
i've tried everything to make my site connect to the database but i always get his error: Could not connect to Master Database
i have 2 files
define('DBHOST','localhost');
define('DBUSER','root');
define('DBPASS','root');
define('DBNAME','test');
define('dbslave','test');
define('dbsiteid','1');
define('dbprefix','_blog');
and connect.php
error_reporting(0);
$connect = mysql_connect("$DBHOST", "$DBUSER", "$DBPASS");
if ( ! $connect) {
die('Could not connect to Database server');
}
$siteid = "$dbsiteid";
$prefix = "$dbprefix";
$dbmast = "$DBNAME";
$dbslave = "$dbslave";
$cmast = mysql_select_db("$DBNAME");
if ( ! $cmast) {
die('Could not connect to Master Database');
}
$cslave = mysql_select_db("$dbslave");
if ( ! $cslave) {
die('Could not connect to Slave Database');
}
how do i solve this error with connection or what i did wrong ?
You do not put constants in quotes, they do not start with $, and by convention are all uppercase.
define('DBHOST','localhost');
define('DBUSER','root');
define('DBPASS','root');
define('DBNAME','test');
define('DBSLAVE','test');
define('DBSITEID','1');
define('DBPREFIX','_blog');
$connect = mysql_connect(DBHOST, DBUSER, DBPASS);
if (!$connect) {die('Could not connect to Database server');}
$cmast = mysql_select_db(DBNAME);
if (!$cmast) {die('Could not connect to Master Database');}
$cslave = mysql_select_db(DBSLAVE);
if (!$cslave) {die('Could not connect to Slave Database');}
Also, defining constants only to assign them to variables is silly and a waste of resources. And don't turn off error reporting when developing as it hides your errors. You want to do the opposite and them them on.
I am using a script php that connect to sqlserver but it doesn't works.
//connection to the database
$dbconn = mssql_connect($Server)
or die("Couldn't connect to SQL Server on $Server");
if($dbconn)echo 'Connected';
//select a database to work with
$selected = mssql_select_db($DB, $dbconn)
or die("Couldn't open database $myDB");
![when running script it gives this error, i m using windows authentication][1]
http://i.stack.imgur.com/a9ndN.jpg
Check mysql_connect()
$dbconn = mysql_connect('hostname','username','password');
Connect using mysql_connect()
$dbconn =mysql_connect(servername,username,password);
example
$con = mysql_connect("localhost","me","123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}