What steps can be taken to identify and resolve deprecated functions in PHP code?

To identify and resolve deprecated functions in PHP code, you can use a tool like PHP_CodeSniffer or PHPCompatibility to scan your codebase for deprecated functions. Once identified, you can replace deprecated functions with their modern equivalents or refactor the code to use alternative approaches. It's important to check the PHP documentation for the specific version you are targeting to ensure compatibility and make necessary adjustments.

// Example code snippet to replace deprecated function
// Deprecated function: mysql_connect()
// Updated function: mysqli_connect()

// Before
$conn = mysql_connect($servername, $username, $password);

// After
$conn = mysqli_connect($servername, $username, $password);