Question

How to use local variable in PHP

Answer 1

$n = 10; // global variable

function f() 
{
    $n = 30; // local variable
    
    echo $n . "<br />";
}

f();

echo $n . "<br />"; // global variable

 
/*
run:

30
10
 
*/

 

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Answer 2

$n = 10; // global variable

function f() 
{
    //$n = 30; // local variable
    
    echo $n . "<br />"; // error not local nor global
}

f();

echo $n . "<br />"; // global variable

 
/*
run:

Notice: Undefined variable: n in C:\xampp\htdocs\he.seek4info.com\test.php on line 13

10
 
*/

 

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