What is the difference between the two following methods (performance, readability, etc.) and what do you prefer?
echo "Welcome {$name}s!"
vs.
echo "Welcome " . $name . "!";
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4Whichever is easier to read.... but as this question is simply polling opinion rather than a question with a definitive or factual answer, then it isn't really appropriate as a SO questionMark Baker– Mark Baker2013-05-28 11:09:22 +00:00Commented May 28, 2013 at 11:09
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1 Answer
Whatever works best for you works... But if you want to go for speed use this:
echo 'Welcome ', $name, '!';
The single quotes tell PHP that no interpretation is needed, and the comma tells PHP to just echo the string, no concatenation needed.
9 Comments
Rich Remer
The speed difference between single and double quotes is a myth (at least with versions of PHP released this millenium) phpbench.com
Borniet
My reference to the speed was by using the comma instead of the dot, which is (marginally) faster. And that's also backed by the link you provided. Very interesting link btw!!!
totymedli
The performance difference is literally microseconds! On the other hand
echo "Welcome $name!"; is many times more readable.
ksadowski
@Shayne It's quite a jump from string interpolation in SQL being a bad, bad habit (I wholeheartedly agree!) to string interpolation in general being a bad habit. I personally find it more readable (less messy) than concatenation, and use it wherever applicable. Are there any strong arguments against string interpolation in general?
philomory
@shayne The SQL argument is completely irrelevant to the question, string concatenation is exactly as bad as interpolation, and for exactly the same reasons, in an SQL context.
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