Question

How to use constant() to get the value of a constant in PHP

Answer 1

define("LEN", 1000);

echo LEN. "<br />";
echo constant("LEN"); 


/*
run: 

1000
1000 

*/

 

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Answer 2

interface intf {
    const S = 'const val';
}

class cl {
    const S = 'const val';
}

$const = 'S';

echo constant('intf::'. $const). "<br />";
echo constant('cl::'. $const). "<br />";  


/*
run: 

const val
const val 

*/

 

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