PHP 7 changes how most errors are reported by PHP. Instead of reporting errors through the traditional error reporting mechanism used by PHP 5, most errors are now reported by throwing Error exceptions.
As with normal exceptions, these Error exceptions
will bubble up until they reach the first matching
catch
block. If there are no matching blocks, then any default exception handler
installed with set_exception_handler() will be called,
and if there is no default exception handler, then the exception will be
converted to a fatal error and will be handled like a traditional error.
As the Error hierarchy does not inherit from
Exception, code that uses
catch (Exception $e) { ... } blocks to handle uncaught
exceptions in PHP 5 will find that these Errors are
not caught by these blocks. Either a catch (Error $e) { ... }
block or a set_exception_handler() handler is required.