Quick ways to optimize PHP code -

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i'm curious if there's low hanging fruit speed php script.

for example, 1 of these better/faster other?

//code 1 echo 'hello ' . 'world';   //code 2 echo 'hello '; echo 'world';

are there other ways clean code , make tad faster? worth it?

http://hungred.com/useful-information/php-micro-optimization-tips/

but have balance how readable , understandable code is.


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