<u></u>set_error_handler用來捕捉trigger_error，
<u></u>set_exception_handler用來捕捉throw new Exception

例如：

set_error_handler("testErrorHandler");

function testErrorHandler($errorNumber,$errorMessage,$errorFile,$errorLine){
     echo "Error Number: ".$errorNumber."<br/>";
     echo "Error Message: ".$errorMessage."<br/>";
     echo "Error File: ".$errorFile."<br/>";
     echo "Error Line: ".$errorLine."<br/>";
     
     die();
}

set_exception_handler("testExceptionHandler");

function testExceptionHandler($exception){
    echo "Exception Code: ".$exception->getCode()."<br/>";
    echo "Exception Message: ".$exception->getMessage()."<br/>";
    echo "Exception File: ".$exception->getFile()."<br/>";
    echo "Exception Line: ".$exception->getLine()."<br/>";
    
    die();
}


throw new Exception("A custom exception has been thrown.");
trigger_error("A custom error has been triggered.");