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Re: terminate a PHP script [message #172569 is a reply to message #172535] Tue, 22 February 2011 00:28 Go to previous messageGo to previous message
The Natural Philosoph is currently offline  The Natural Philosoph
Messages: 993
Registered: September 2010
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sheldonlg wrote:
> On 2/21/2011 12:06 PM, Denis McMahon wrote:
>> On 21/02/11 16:51, n00m wrote:
>>>> No, you should not use goto! It causes more problems than it solves.
>>>
>>> Why on the earth???
>>> "goto" can produce 10000 empty lines in no time. Like this:
>>
>> Because there is no structure to a program that uses goto. When it fails
>> to work properly (and it will) it can become impossible to see how it
>> arrived at the point that it fails at.
>>
>>> $cnt = 0;
>>>
>>> mm:
>>> ++$cnt;
>>> echo '<BR>';
>>> if ($cnt< 10000) goto mm;
>>
>> Your goto method uses 5 lines. A while loop uses 2:
>>
>> $i = 10000;
>> while ($i--) echo "<br>\n";
>>
>> and a for loop only 1:
>>
>> for ($cnt = 10000; $cnt--;) echo "<br>\n";
>>
>> or:
>>
>> for ($cnt = 0; $cnt< 10000; $cnt++) echo "<br>\n";
>>
>> Rgds
>>
>> Denis McMahon
>
> I fully agree about gotos. There is NO need for them. What is wrong
> with this pseudocode?
>
> ===========
> if (passes test for failure condition) {
> ... all the rest of the code for success that is already there
> --- except the footer
> }
>
> footer stuff.
> ==========
>
> All it does is add two lines (the if test and a closing brace) and one
> level of indentation, and it does what the OP wants.
>
> Since seeing the if-then-else first appear in Fortran circa 1980, I have
> never used a single goto in any language in which I have coded.
>
Well that's cos you never wrote Assembler :-)
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