Anthony Gentile wrote:
for e.g.
$var = 'world';
echo "hello $var";
vs
echo 'hello '.$var;
The first uses twice as many opcodes as compared to the second. The first is
init a string and adding to it the first part(string) and then the second
part (var); once completed it can echo it out. The second is simply two
opcodes, a concatenate and an echo. Interpolation.
I'd call this a micro-optimization. If changing this causes that much of
a difference in your script, wow - you're way ahead of the rest of us.
http://blog.libssh2.org/index.php?/archives/28-How-long-is-a-piece-of-string.html
http://www.phpbench.com/
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