I'm trying to figure out how can I put two differents MYSQL database connections name on the same page, one is for local PC and one is for hosting server.
Does is possible to have two different databases servers name on the same page so that way not to change connection database name in a script before upload.
I have code like this for local PC
<?php
$username = "your_name";
$password = "your_password";
$hostname = "localhost";
//connection to the database
$dbhandle = mysql_connect($hostname, $username, $password)
or die("Unable to connect to MySQL");
echo "Connected to MySQL<br>";
?>
Can can i add another connection name in the server in same page without changing the connection database!
alidad
Yes, a single page may query as many different servers as needed:
<?php
$server1 = new mysqli("server1.example.com", "user1", "password1", "database1");
$server2 = new mysqli("server2.example.com", "user2", "password2", "database2");
$result = $server1->query("SELECT 'Hello user' AS _message FROM DUAL");
$row = $result->fetch_assoc();
echo htmlentities($row['_message']);
$result = $server2->query("SELECT 'Hello user' AS _message FROM DUAL");
$row = $result->fetch_assoc();
echo htmlentities($row['_message']);
The way is to have a config.ini file in your localhost, and a different one in your production environment. This way you will parse this file and get your credentials.
A better way to do that is using this library: https://github.com/vlucas/phpdotenv
It works basically on the same way, but is easy to maintain.
Related
I'm relatively new to any type of programming or coding. I'm not quite understanding why no matter what adjustments I make to my php file I can't seem to pull any data from a table.
Here is a link to the table: https://i.gyazo.com/4ad5e860895014c49dbe0539c38cdec2.png
Above is the test table I have been trying to use. From what I can understand I'm connecting to the database okay, but all of my problems come after the connection. Also, I'm using php 7.0 so a lot of the information I'm finding online has not been helpful.
If there is something glaringly wrong with my table or in my code, please let me know.
Here is my code:
'''
//Set Variables
$serverName = "localhost";
$userName = "root";
$password = "";
$databaseName = "test";
//Create Connection
$connection = mysqli_connect($serverName,$userName,$password,$databaseName);
//Check Connection
if(!$connection){
die("Connection failed: ".mysqli_connect_error());
}
echo "Connected successfully <br>";
//Fetch Data
$query = "SELECT * from table1";
$result = mysqli_query($connection, $query);
$row = mysqli_fetch_array($result, MYSQLI_NUM);
printf ($row[1], $row[2]);
mysqli_free_result($result);
mysqli_close($connection);
I figured out the issue a few hours ago. The code I had posted would have worked perfectly fine if I was connecting to the port for MySQL rather than MariaDB. Didn't realize that the port that MariaDB was connected to was the default.
MariaDB by default was port 3306, but MySQL was 3308. After specifying 'localhost:3308' I was able to start properly pulling rows from my tables.
Just built my first database to test out learning skills using the simple query below:
<?php
mysqli_connect("xxx","yyy","zzz" , "newtone" );
if (mysqli_connect_error()){
echo ("could not connect to database");
}
?>
This is what I got
:(42000/1044): Access denied for user 'yyy'#'xxx' to database 'newtone'......
I don't get it. So When i Use this:
mysqli_connect("xxx","yyy","zzz" );
if (mysqli_connect_error()){
echo ("could not connect to database");
}
?>
I don't get an error message, just a blank page (notice how the database name is not included on the login argument). What am I doing wrong?
You want to connect with database then need three things for create connection dbhost username,dbhost password and your database name.
<?php
$dbhost = "localhost";
$dbuser = "root"; //In case of localhost (default db username)
$dbpass = ""; //In case of localhost
$dbname = "testDb";//Your database name
$con = mysqli_connect($dbhost,$dbuser,$dbpass,$dbname );
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
?>
Your 2nd example works because you are successfully connecting to the MySql server, and defaulting to a default database other than "newtone"
If you tried a command like mysqli::select_db after connecting, you would see the same error. http://php.net/manual/en/mysqli.select-db.php
The crux of your problem seems to be permissions for your user yyy. Make sure user yyy has various permissions like read/write on the DB "newtone"
Hi I'm having problems accessing my server i'm using mysql on my laptop apache2 and php. my problem is i can seem to connect to db but can't get any data out of the registered table inside the db. Thanks in advance always i'm running window7.
<?php
$username = "root";
$password = "deslap";
$hostname = "localhost";
#connection to the database seems to work and prints connected to MySQL
$dbhandle = mysql_connect($hostname, $username, $password)or die("Unable to connect to MySQL");
echo "<br />Connected to MySQL<br>";
#select a database to work with
$selected = mysql_select_db('registered',$dbhandle)or die("Could not select database");
#execute the SQL query and return records.
$result = mysql_query("SELECT id, Name FROM registered");
while($row = mysql_fetch_array($result))
{
echo "ID:".$row{'id'}." Name:".$row{'name'}."Email: ".$row{'Email'};
}
?>
</body>
</html>
Change the curly brackets to box brackets (you can use either {} or [], but square brackets are conventional for working with array elements) -
echo "ID:".$row['id']." Name:".$row['Name']."Email: ".$row['Email'];
You're also selecting only 'id' and Name (change 'name' to 'Name') so Email will not be returned.
I am trying to connect to a mysql database within a php script. So far, my code looks like
//to my knowledge, this works. I was able to echo out the correct name
$name = $_POST["name"];
$server_name = "localhost";
$user_name = //my user name
$password = //my password
$db_name = //the db name
//it passes this error check, so I am connecting properly I am assuming
$dbconn = mysql_connect($server_name, $user_name, $password)
or die ('Could not connect to database: ' . mysql_error());
mysql_select_db($db_name, $dbconn);
$query = "SELECT *
FROM brothers
WHERE name = '$name'";
//it DOES NOT make it past this one
$result = mysql_query($query)
or die('Bad Query: ' . mysql_error());
//filter through the query as a row
$row = mysql_fetch_array($result, MYSQL_ASSOC);
//echo the result back to the user
echo $row["name"];
echo $row["major"];
//close the connection
mysql_close($dbconn);
I keep getting the error "No Database Selected", even though I am sure that I spelled the database name correctly (I copy pasted). Does anyone know why my code might be throwing this error?
Could be a permissions issue(the user which logon maybe don't have read rights on the database) :
mysql_select_db() fails unless the connected user can be authenticated
as having permission to use the database.
Here's my comment in answer form:
Do the same or die ('Could not use DB: ' . mysql_error()) after the mysql_select_db() call to find out what's going on there.
Your comment ("access denied") suggests that you have permissions to connect to the database server but not to use the database. Remember that one database server can have multiple databases on it, each with their own permission scheme. Check the permissions on the database you're trying to use and make sure that $user_name can use it with $password.
I am a complete database newbie. So far, I know that I can connect to MySQL using PHP's mysql_connect() command, but apart from that, I really don't see how to take that data and put it onto a web page.
a) are there ways other than mysql_connect()
b) lets say I had a table of data in mysql and all I wanted was for that table (for example: list of names and telephone numbers) to now appear on my web page. I can't for the life of me find a tutorial for this.
<?
$database_name = "dbname";
$mysql_host = "localhost"; //almost always 'localhost'
$database_user = "dbuser";
$database_pwd = "dbpass";
$dbc = mysql_connect($mysql_host, $database_user, $database_pwd);
if(!$dbc)
{
die("We are currently experiencing very heavy traffic to our site, please be patient and try again shortly.");
}
$db = mysql_select_db($database_name);
if(!$db)
{
die("Failed to connect to database - check your database name.");
}
$sql = "SELECT * FROM `table` WHERE `field`= 'value'";
$res = mysql_query($sql);
while($row = mysql_fetch_assoc($res)) {
// code here
// access variables like the following:
echo $row['field'].'<br />';
echo $row['field2'];
}
?>
Check out mysql_fetch_assoc mysql_fetch_array and mysql_fetch_object
This is the very basics, you will want to search for tutorials. There are many about.