PHP Variables Easy Questions and Answers

What will be the output of the following PHP code ?

<?php
$n1 = 15;
$n2 = 11;
$R = "$n1 + $n2";
echo "$R";
?>

Correct Option: A

Variable R will store 15 + 11 because 15 + 11 is given in double-quotes.

What will be the output of the following PHP code ?

<?php
$m = 15;
$n = 8;
$p = fun(15,8);
function fun($m,$n)
{
    $n = 7;
    return $m - $n + $n - $m; 
}
echo $m;
echo $n;
echo $p;
?>

Correct Option: D

The value returned from the function is 0, and value of m is 15, value of n is 8 and p is 0.

What will be the output of the following PHP code ?

<?php
$p=7;
function calc()
{
    echo $GLOBALS['p'];
    $GLOBALS['p']++;
}
calc();
calc();
calc();
?>

Correct Option: B

Since, we are using $GLOBALS[‘p’].

What will be the output of the following PHP code ?

<?php
static $n = 5;
function calc()
{
    echo $n;
    $n++;
}
calc();
calc();
calc();
?>

Correct Option: C

Since variable n is not defined inside the function fun(), nothing will be printed.

What will be the output of the following PHP code ?

<?php
function calc()
{
    static $p = 5;
    echo $p;
    $p++;
}
calc();
calc();
calc();
?>

Correct Option: C

When static is used, each time the function is called, that variable will still have the information it contained from the last time the function was called.