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Exception handling is an important feature in PHP that enables developers to detect and handle errors that occur during the execution of a program. In simple terms, when a program encounters an unexpected problem, such as an invalid input or a database error, it can throw an exception instead of causing the entire program to shut down. This allows you to write code that is more robust and resilient, as it can continue running even when things go wrong.

In PHP, exceptions are used to report errors that occur during runtime, and they can be caught and handled by a try-catch block. The try block contains the code that may throw an exception, and the catch block is used to specify how the error should be handled. By using exception handling, you can write code that is more reliable and easier to maintain, as it allows you to easily handle a wide range of possible errors that could occur in your program.