Operators And Expressions
practice.

<?php
class myObject { }
define('myObject::CONSTANT', 'test');
echo myObject::CONSTANT; 
?>

<?php
$x = 5;
$y = 10;
$z<spanclass="p-blue">=</span><spanclass="p-red">"$x + $y";
echo "$z";
?>

<?php
$x = 4;
$y = 3;
$z = 1;
echo "$x=$x + $y+$z";
?>

<?php
$x = 4;
$y = 3
$z = 1;
$z<spanclass="p-blue">=</span>$z + $x<spanclass="p-blue">+</span>$y;
echo "$z";
?>

<?php
$x = 3.3;
$y = 2;
echo $x<spanclass="p-blue">$y;
?>

<?php
$x = 10;
$y = 4;
$z = 3;
echo $x<spanclass="p-blue">$y % $z;
?>

<?php
$x = 10;
$y = 4;
$z = 3;
echo ($x<spanclass="p-blue">$y) + $z);
?>

<?php
$x = 30;
$y = 20;
$z = 10;
echo $x<spanclass="p-blue">+</span>$y - $z<spanclass="p-blue">/(</span>$z - $y);
?>

<?php
$x = 4;
$y = -3;
$z = 11;
echo 4 + $y<spanclass="p-blue">\ast </span>$z / $x;
?>

<?php
$x = 3.5;
$y = 2;
$z = 2;
echo $x<spanclass="p-blue">/</span>$y / $z;
?>

<?php
one = 1;
two = 2;
three = 3;
four = 4;
echo "one / two + three / four";
?>

<?php
$on$e = 1;
$tw$o = 2;
$thre$e = 3;
$fou$r = 4;
echo "$on$e / $tw$o + $thre$e / $fou$r"; 
?>

<?php
$on_e = 1;
$tw_o = 2;
$thre_e = 3;
$fou_r = 4;
echo $o{n}_e<spanclass="p-blue">/</span>$tw_o + $thr{e}_e<spanclass="p-blue">/</span>$fou_r; 
?>

<?php
$On_e = 1;
$tw_o = 2;
$thre_e = 3;
$fou_r = 4;
echo $o{n}_e<spanclass="p-blue">/</span>$tw_o + $thr{e}_e<spanclass="p-red">/</span>$fou_r;
?>

<?php
echo $red;
?>

<?php
$four4 = 4;
$three3 = 3;
$two2 = 2;
echo $four4<spanclass="p-blue">+</span>$three3 / $two2 - 1;
?>

<?php
$4four = 4;
$3three = 3;
$2two = 2;
echo $4four<spanclass="p-blue">+</span>$3three / $2two - 1;
?>

<?php
int $one = 1;
echo "$one";
?>

<?php
var $one = 1;
var $two = 2;
echo $one<spanclass="p-blue">/</span>$two * $one<spanclass="p-blue">/</span>$two * $two;
?>

<?php
$hello = "Hello World";
$bye = "Bye";
echo $hello;<spanclass="p-red">"$bye";
?>