What is use of the try catch and finally Blocks in PHP ?

In PHP, the try, catch, and finally blocks are used to implement exception-handling mechanisms. The try block encapsulates the code that may throw exceptions. The catch block is used to catch and handle exceptions thrown within the try block. The finally block contains code that is always executed, regardless of whether an exception is thrown or caught.

Syntax

try {

    // Code that may throw exceptions
} catch (Exception $e) {

    // Code to handle exceptions
} finally {

    // Optional: Code that always executes
}

Important Points

• The try block must be followed by at least one catch block or one finally block, or both.
• The catch block catches and handles exceptions thrown within the try block.
• The finally block is optional and is used to execute cleanup code that should always run, regardless of whether an exception is thrown or caught.

Differentce Between try, catch and finally Blocks

try	catch	finally
Encloses code that may throw exceptions	Catches and handles exceptions thrown in the try block	Contains cleanup code that always executes
Must be followed by at least one catch or finally block, or both	Can have multiple catch blocks to handle different types of exceptions	Optional and executes regardless of whether an exception is thrown or caught
Execution continues after the try block if no exceptions are thrown	Executes only if an exception is thrown in the try block	Executes regardless of whether an exception is thrown or caught

Usage:

• Exception Handling: try block encapsulates code that may throw exceptions, while catch block handles those exceptions.
• Cleanup Operations: finally block is used for cleanup operations such as closing database connections or releasing resources, ensuring they are executed even if exceptions occur.