2009/11/4 Nathan Rixham <nrix...@gmail.com>:
> Nick Cooper wrote:
>>
>> Hi,
>>
>> I was just wondering what the difference/advantage of these two
>> methods of writing a string are:
>>
>> 1) $string = "foo{$bar}";
>>
>> 2) $string = 'foo'.$bar;
>
> 1) breaks PHPUnit when used in classes (need to bug report that)
> 2) [concatenation] is faster (but you wouldn't notice)
>
> comes down to personal preference and what looks best in your (teams) IDE I
> guess; legibility (and possibly portability) is probably the primary
> concern.I would tend to agree here; the concat is faster but you may well only notice in very tight loops. The curly brace syntax can increase code readability, depending on the complexity of the expression. I use them both depending on the situation. Remember the rules of optimization: 1) Don't. 2) (Advanced users only): Optimize later. Write code so that it's readable, and then once it's working, identify the bottlenecks and optimize where needed. If you understand code analysis and big-O etc then you will start to automatically write mostly-optimized code anyway and in general, I doubt that you'll often identify the use of double quotes as a bottleneck--it almost always turns out that other operations and code structures are far more expensive and impact code speed much more. That said, you don't really lose anything by using concatenation from the start, except perhaps some legibility, so as Nathan said it often really just comes down to personal preference and perhaps the house coding conventions. Regards, Torben > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
