On Tue, Oct 5, 2010 at 3:53 PM, Ashley Sheridan <ash@xxxxxxxxxxxxxxxxxxxx>wrote: > On Tue, 2010-10-05 at 15:46 -0400, Steve Staples wrote: > > > On Tue, 2010-10-05 at 20:35 +0100, Ashley Sheridan wrote: > > > On Tue, 2010-10-05 at 15:28 -0400, chris h wrote: > > > > > > > Benchmark and find out! :) > > > > > > > > What are you using this for? Unless you are doing something crazy it > > > > probably doesn't matter, and you should pick whichever you feel looks > nicer > > > > / is easier to code in / etc. > > > > > > > > Chris H. > > > > > > > > On Tue, Oct 5, 2010 at 3:23 PM, saeed ahmed <saeed.sas@xxxxxxxxx> > wrote: > > > > > > > > > $a = 'hey'; > > > > > $b = 'done'; > > > > > > > > > > $c = $a.$b; > > > > > $c = "$a$b"; > > > > > > > > > > which one is faster for echo $c. > > > > > > > > > > > > > > As far as I'm aware, the first of the two will be faster, but only > just. > > > As Saeed mentioned, the difference will be negligible, and unless you > > > plan to run a line like that in a loop or something hundreds of > > > thousands of times, you probably won't notice any difference. > > > Thanks, > > > Ash > > > http://www.ashleysheridan.co.uk > > > > > > > > > > > > to be proper, shouldn't it technically be > > $c = "{$a}{$b}"; > > > > ?? > > > > Steve. > > > > > > > It doesn't have to use the braces. The braces only tell PHP exactly > where to stop parsing the current variable name. The following examples > wouldn't work without them: > > $var = 'hello '; > $arr = array('msg 1'=>'hello','msg 2'=>'world'); > > echo "{$var}world"; > echo "{$arr['msg 1']}{$arr['msg 2']}"; > > Without the braces, in the first example PHP would look for a variable > called $varworld, and in the second it would be looking for a simple > scaler called $arr, not the array value you wanted. > > Thanks, > Ash > http://www.ashleysheridan.co.uk > > > Just to add in here, they are also required when calling an object's properties, if - ready for this? - that object is itself a property of another object. so while this would work, "$circle->circumference" this would NOT work "$circle->circumference->inches" The later would be injecting the $circle->circumference property, followed by string literal "->inches". So to get it to work you would need to use curlys. "{$circle->circumference->inches}" Chris H.
