Question

How to define constant in PHP

Answer 1

define("PI", 3.14);

echo PI;

echo "<br />";

echo PI * 16;


/*
run:

3.14
50.24

*/

 

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Answer 2

define("PI", 3.14);

echo PI;

echo "<br />";

$n = 17;

echo PI * $n;


/*
run:

3.14
53.38

*/

 

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Answer 3

define("PROGRAMMING_LANGUAGES", "C, C++, BASIC, COBOL, Pascal, Java");

echo PROGRAMMING_LANGUAGES;


/*
run:

C, C++, BASIC, COBOL, Pascal, Java 

*/

 

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Answer 4

define("PROGRAMMING_LANGUAGES", "C, C++, BASIC, COBOL, Pascal, Java");

function f() 
{
    echo PROGRAMMING_LANGUAGES;
}


f();

/*
run:

C, C++, BASIC, COBOL, Pascal, Java 

*/

 

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