What are the potential drawbacks of upgrading a project from PHP 5.5.x to 5.6.x on GitHub?

When upgrading a project from PHP 5.5.x to 5.6.x on GitHub, potential drawbacks may include compatibility issues with deprecated features in PHP 5.6.x that were present in 5.5.x. To solve this, it is important to review the PHP documentation for deprecated features and make necessary code changes to ensure compatibility with PHP 5.6.x. 

// Example code snippet demonstrating how to fix deprecated features in PHP 5.6.x

// Deprecated feature in PHP 5.5.x
mysql_connect("localhost", "username", "password");

// Updated code for PHP 5.6.x using mysqli
$mysqli = new mysqli("localhost", "username", "password", "database");

if ($mysqli->connect_error) {
    die("Connection failed: " . $mysqli->connect_error);
}

Keywords

PHP 5.5.x PHP 5.6.x GitHub backward compatibility deprecated features

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