Variable usage

[anon404]

Is there any efficieny difference between these 2 examples. I have been using method 1 but would rather use the second. If there is no difference what would be recommended?
1:

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$var = "abc";
do_something_abc($var);
$var = "def";
do_something_def($var);
 

2:

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$var_a = "abc";
$var_b = "def";
do_something_abc($var_a);
do_something_def($var_b);
 

[limitdesigns]

If there is any difference at all, it wouldn't be noticeable. Slow-downs that are results of trivial things like this are only apparent when you have a huge application, so I wouldn't worry about it.

As far as which one is recommended, the second option looks like it's more organized, but it's hard to say, without knowing what exactly you're doing with this code.

[josh]

Answer: neither, most efficient (and also readable) would be use no variable at all.

But yeah the real answer is it doesn't matter. Don't worry about saving 1ms of variable time when you are going to have 500ms database queries later on!

[Darhazer]

Actually

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$var = 'abc';

is faster, since PHP doesn't need to parse the string and replace variables in it