Introduction
If you are a web developer, you may have encountered the error “Call to undefined function mysql_connect()” at some point while working with PHP. This error usually occurs when you are trying to connect to a MySQL database using the deprecated MySQL extension. In this blog post, we will discuss what causes this error and how to fix it.
What causes the error?
As mentioned earlier, this error occurs when you are trying to use the deprecated MySQL extension, which has been removed in PHP 7.0. Instead, Texhup update you should use the MySQLi or PDO_MySQL extensions, which are more secure and offer better performance. If you are using an older version of PHP that still supports the MySQL extension, it may still be enabled in your PHP configuration file (php.ini). However, if you are using PHP 7.0 or later, the extension is no longer available, so you will need to update your code to use one of the newer extensions.
How to fix the error
To fix the “Call to undefined function mysql_connect()” error, you will need to update your code to use either the MySQLi or PDO_MySQL extension. Here are the steps to do it:
1. Check your PHP version
First, check which version of PHP you are using. You can do this by adding the following code to a PHP file and running it on your server:
<?php
phpinfo();
?>
This will display a page with information about your PHP installation, including the version.
2. Update your code
Once you have determined which version of PHP you are using, you can update your code to use either the MySQLi or PDO_MySQL extension. Here is an example of how to use the MySQLi extension to connect to a database:
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";
?>
This code creates a new MySQLi object and uses it to connect to a database. If the connection fails, an error message is displayed.
3. Restart your server
After updating your code, you may need to restart your server for the changes to take effect. Once you have done this, try running your code again to see if the error has been call to undefined function mysql_connect() fixed.
Conclusion
In conclusion, the “Call to undefined function mysql_connect()” error occurs when you are using the deprecated MySQL extension in PHP. To fix it, you need to update your code to use either the MySQLi or PDO_MySQL extension, which are more secure and offer better performance. By following the steps outlined in this blog post, you should be able to fix this error and continue working on your PHP projects without any issues.
