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Re: terminate a PHP script [message #172590 is a reply to message #172576] Tue, 22 February 2011 01:53 Go to previous messageGo to previous message
sheldonlg is currently offline  sheldonlg
Messages: 166
Registered: September 2010
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On 2/21/2011 8:15 PM, The Natural Philosopher wrote:
> Peter H. Coffin wrote:
>> On Mon, 21 Feb 2011 18:50:39 +0000, Tim Streater wrote:
>>> Because of the incredible convolution and depth of nested
>>> if/then/else you can get to. If I have (as it might be) a function
>>> that's scanning a string looking for and obtaining options and their
>>> values for some command previously scanned off the string, and I
>>> detect an error, I want to set an error code and exit right there. I
>>> don't want any subsequent maintainer to have to intuit that, in fact,
>>> from this point on nested 15-deep in else clauses, no more code is
>>> executed for that path through the function.
>>>
>>> That way I rarely get more than 3-deep in if/then/else. To me, it's
>>> all about readbility.
>>
>> *grin* for me, it's all about comprehesibility. If you don't like how
>> deep you're nesting, maybe you need to break something out into a
>> function instead....
>>
> Yes, but how much stack do you have? Can you afford the overhead of a
> call/return? How much does splitting a whole block of code to four pages
> away make the comprehensibility problem worse, not better?

If you have fifteen pages of code within a success bracket, then you are
at least 8-10 times too big in the routine. It should be broken into
smaller segments. I know that that when I have a piece of code that is
getting lengthy, I either put some of it in functions, or I make a more
liberal use of include files and put blocks of code in include files.
It makes it MUCH more readable and maintainable that way.

-
Shelly
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