Deprecated: mysql_connect()

Question

I am getting this warning, but the program still runs correctly.

The MySQL code is showing me a message in PHP:

Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in C:\xampp\htdocs\task\media\new\connect.inc.php on line 2

My connect.inc.php page is

<?php
  $connect = mysql_connect('localhost','root','');
  mysql_select_db('dbname');
?>

What does this mean and how can I eliminate the message?

Answer 1

Well, i just faced such message today when i moved to new hosting! anyway i have tried to change the "mySQL" to "mySQLi" but not working, so i have done this:

<?php
# FileName="Connection_php_mysql.htm"
# Type="MYSQL"
# HTTP="true"
# Turn off all error reporting
error_reporting(0);
$connect_myconn = "Database Connection";
$hostname_myconn = "localhost";
$database_myconn = "db name";
$username_myconn = "user name";
$password_myconn = "pass";
$myconn = mysql_connect($hostname_myconn, $username_myconn, $password_myconn) or die("<h1 style=margin:0;>A MySQL error has occurred.</h1><p><b>Your Query:</b> " . $connect_myconn . "<br /> <b>Error Number:</b> (" . mysql_errno() . ")</p>" . mysql_error());
mysql_select_db($database_myconn, $myconn);
?>

The trick is to set error reporting off :)

# Turn off all error reporting
error_reporting(0);

Answer 2

put this in your php page.

ini_set("error_reporting", E_ALL & ~E_DEPRECATED); 

Answer 3

This warning is displayed because a new extension has appeared. It suppouse that you still can use the old one but in some cases it´s impossible.

I show you how I do the connection with database. You need just change the values of the variables.

My connection file: connection.php

<?php    
 $host='IP or Server Name (usually "localhost") ';
 $user='Database user';
 $password='Database password';
 $db='Database name';

 //PHP 5.4 o earlier (DEPRECATED)
 $con = mysql_connect($host,$user,$password) or exit("Connection Error");
 $connection = mysql_select_db($db, $con);

 //PHP 5.5 (New method)
 $connection =  mysqli_connect($host,$user,$password,$db);
?>

The extension changes too when performing a query.

Query File: "example.php"

<?php
 //First I call for the connection
 require("connection.php");

 // ... Here code if you need do something ...

 $query = "Here the query you are going to perform";

 //QUERY PHP 5.4 o earlier (DEPRECATED)
 $result = mysql_query ($query) or exit("The query could not be performed");

 //QUERY PHP 5.5 (NEW EXTENSION)
 $result = mysqli_query ($query) or exit("The query could not be performed");    
?>

This way is using MySQL Improved Extension, but you can use PDO (PHP Data Objects).

First method can be used only with MySQL databases, but PDO can manage different types of databases.

I'm going to put an example but it´s necessary to say that I only use the first one, so please correct me if there is any error.

My PDO connection file: "PDOconnection.php"

<?php
 $hostDb='mysql:host= "Here IP or Server Name";dbname="Database name" ';
 $user='Database user';
 $password='Database password';

 $connection = new PDO($hostDb, $user, $password);
?>

Query File (PDO): "example.php"

<?php
 $query = "Here the query you are going to perform";
 $result=$connection->$query;
?>

To finish just say that of course you can hide the warning but it´s not a good idea because can help you in future save time if an error happens (all of us knows the theory but if you work a lot of hours sometimes... brain is not there ^^ ).

Answer 4

If you have done your coding then

ini_set("error_reporting", E_ALL & ~E_DEPRECATED); 

is good option but if you are in beginning then definitely you should use mysqli.

Answer 5

There are few solutions for your problem.

The way with MySQLi would be like this:

<?php
$connection = mysqli_connect('localhost', 'username', 'password', 'database');

To run database queries is also simple and nearly identical with the old way:

<?php
// Old way
mysql_query('CREATE TEMPORARY TABLE `table`', $connection);
// New way
mysqli_query($connection, 'CREATE TEMPORARY TABLE `table`');

Turn off all deprecated warnings including them from mysql_*:

<?php
error_reporting(E_ALL ^ E_DEPRECATED);

Answer 6

mysql_*, is officially deprecated as of PHP v5.5.0 and will be removed in the future.

Use mysqli_* function or pdo

Read Oracle Converting to MySQLi