php set_exception_handler函数

Sets the default exception handler if an exception is not caught within a try/catch block. Execution will stop after the exception_handler is called.

设置默认的异常处理函数，捕获没有用try/catch块处理的异常。当调用exception_hander时，程序停止执行。

<?php
function exception_handler($exception) {
  echo "Uncaught exception: " , $exception->getMessage(), "\n";
}

set_exception_handler('exception_handler');

throw new Exception('Uncaught Exception');
echo "Not Executed\n";
?>