What are the consequences of following incorrect or outdated PHP tutorials?

Following incorrect or outdated PHP tutorials can lead to code that is insecure, inefficient, or incompatible with newer versions of PHP. This can result in security vulnerabilities, poor performance, and errors in your application. To avoid these consequences, always refer to up-to-date and reputable PHP resources when learning or implementing new code. 

// Example of using a deprecated function that may cause issues
// Incorrect way:
mysql_connect('localhost', 'username', 'password');

// Correct way:
// Use mysqli or PDO for database connections
$mysqli = new mysqli('localhost', 'username', 'password', 'database_name');

Keywords

incorrect outdated PHP tutorials deprecated functions security vulnerabilities

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