Hello teacher, why did I write the code above and the output result did not change?
多多金库(备用)
多多金库(备用) 2018-11-25 04:12:43
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1123

$hello = world;
$world = 'Hello';
echo $hello;

The displayed result is: word, not hello?

多多金库(备用)
多多金库(备用)

reply all(1)
123fan

php is executed from top to bottom, swap one or two lines to get the result you want

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