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.
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