Online PHP editor | output for 5dsUK

<?php $int_var=256; $double=2.54; $r=$int_var+$double; echo"$r"; if(2+1==4) { echo"this value is equal"; } else { echo"this value is not equal\n"; } define("constant",80); echo constant("constant\n"); $a=10; $b=200; $c=$a=$b; $d=$b-$a; $e=$b%$a; $f=$a*$b; $g=$b/$a; $a++; echo "$a + $b=$c, this is arithmetic operation\n"; echo "$b - $a =$d, this is subtraction operation\n"; echo "$b / $a =$g, this is division operation\n"; echo "$b % $a=$e, this is modulus and returns reminder\n"; echo "$a * $b=$f, this is multipication\n"; echo "++$a, this will increment a value and return a value\n"; echo "$a++, this will first print a value then it increment\n"; echo "$--$b, this will decrement b value and return b \n"; echo "$b--, this will return b value and then decrement\n"; $d=date("D"); if($d=="sun") { echo "have nice day\n"; echo "have a gr8 day\n"; } elseif($d=="sat") { echo "wait for sunday and come back and read msg\n" } else { echo "have a nice week"; }