What are try, catch, and finally constructs in PHP?

These are constructs for exception handling in PHP. They allow catching errors and executing code when they occur or regardless of them.

• try: A block of code where an exception may occur.

  <?php
  // Code that may throw an exception
  

• catch: A block of code that executes if an exception of a specified type was thrown inside the try block. Multiple catch blocks can be used for different exception types.

  <?php
  // Catching an exception of type Exception
  catch (Exception $e) {
      // Code to handle the exception
  }
  

• finally: A block of code that always executes, regardless of whether an exception was thrown and caught. Useful for resource cleanup.

  <?php
  // This code will always run
  finally {
      // Cleanup, closing resources, etc.
  }
  

Usage structure:

<?php
try {
    // Attempt to execute code
} catch (ExceptionName $variable) {
    // Handle the exception if it was thrown and matches the type
} finally {
    // Code that always executes
}