Error while creation of tables in the selected database in Mysql - php

Question

I am getting an error as A link to the server could not be established in /var/www/Test.php on line 25 and mysql_select_db(): Access denied for user 'pass'#'localhost' (using password: NO) in /var/www/Test.php on line 25 when i trying to create a tables in a created Data base.
My code:
<?php
$con = mysqli_connect("localhost","root","pass");
connection to mysql server
//checking the connection
if(mysqli_connect_errno($con))
{
echo "Sorry!Failed to connect Mysql" . mysqli_connect_error();
}
$sql = "CREATE DATABASE viral_coff";
if(mysqli_query($con,$sql))
echo "database Created Successfully!";
else
echo "error in creating the database" . mysqli_error($con);
mysql_select_db('viral_coff') or die(mysql_error());;
$tab = ' CREATE TABLE retention( '.
' playing-date DATE ,' .
' that-day INT ,' .
' 1_day INT ,' .
' 3_days INT ,' .
' 7_days INT ,' .
' 31_days INT ,)' ;
if(mysqli_query($con,$tab))
echo "Created Tables";
else
echo "Error creating table" . mysqli_error($con);
mysqli_close($con)
?>
What am i doing wrong?

Answer 1

mysql_ and mysqli_ functions dont work well together. Choose one of it and work with them, not both.

Answer 2

You're mixing mysql_* functions with mysqli_* functions. Which you of course can't!
You need to use mysqli_select_db() instead of mysql_select_db()
Also learn to put some brackets on your if statements, thereby you can be 100% sure of what is inside and outside of the statement.

Answer 3

You are remove password.
<?php
define('Hostname','localhost');
define('Username','root');
define('Password','');
define('DB_Name','viral_coff');
$con=mysqli_connect(Hostname,Username,Password);
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// Create database
$sql="CREATE DATABASE ".DB_Name;
if (mysqli_query($con,$sql))
{
echo "Database ".DB_Name." created successfully";
}
else
{
echo "Error creating database: " . mysqli_error($con);
}
$con = mysqli_connect(Hostname,Username,Password,DB_Name);
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// Create table
$sql = "CREATE TABLE retention(playing_date DATE, that_day INT, 1_day INT , 3_days INT ,7_days INT , 31_days INT)";
// Execute query
if (mysqli_query($con,$sql))
{
echo "Table retention created successfully";
}
else
{
echo "Error creating table: " . mysqli_error($con);
}
?>