PHP Operators Easy Questions and Answers

What will be the output of the following PHP code ?

<?php
$p = 8; $r = 7; $q = 15; 
$s = $p + $r == $q;
print $s;
?>

First p and r are added and then tested if s = 15, which is true thus return 1.

What will be the output of the following PHP code ?

<?php
$m = 10; $n = -8; $t = 2; 
$k = ++$m && ++$n || ++$t;
echo $k; 
echo $m;
?>

111

What will be the output of the following PHP code ?

<?php
$p = 10;
$r = $p++; $q = ++$p;
print $p; 
print $q; 
?>

First case p is incremented after setting q to p.

What will be the output of the following PHP code ?

<?php
$p = 20; $q = 20;
if ($p = 12)
    $q--;
echo $p;
echo $q--;
?>

p is set to 20 in the if condition and q is post decremented in the print statement.

What will be the output of the following PHP code ?

<?php
$p = 2; $q = 2; $r = 2;
echo ++$p + ++$p+$p++; print $p++ + ++$q; print ++$r + $r++ + $p++;
?>

Follow the order of post and pre increments.