revision:
code:
<?php
$a = 10; $b = 5;
echo ($a + $b) . "< br>";
echo ($a - $b) . "< br>";
echo ($a * $b) . "< br>";
echo ($a / $b) . "< br>";
echo ($a % $b) . "< br>";
echo ($a ** $b) . " < br>";
echo "< br>";
$c = 20; echo $c . "< br>";
$c = 20; $c /= 100; echo $c . "< br>";
$c = 20; $c %= 13; echo $c . "< br>";
echo "< br>";
$d = 100; $e = "100"; var_dump($d == $e); echo "< br>";
$d = 100; $e = "100"; var_dump($d === $e); echo "< br>";
$d = 100; $e = "100"; var_dump($d != $e); echo "< br>";
$d = 100; $e = "100"; var_dump($d <> $e); echo "< br>";
$d = 100; $e = "100"; var_dump($d !== $e); echo"< br>";
$d = 100; $e = "100"; var_dump($d > $e); echo"< br>";
$d = 100; $e = "100"; var_dump($d < $e); echo"< br>";
$d = 100; $e = "100"; var_dump($d >= $e); echo"< br>";
$d = 100; $e = "100"; var_dump($d <= $e); echo"< br>";
$d = 100; $e = "100"; var_dump($d <=> $e); echo"< br>";
echo "< br>";
$f = 10; echo ++$f; echo "< br>";
$f = 10; echo $f++; echo "< br>";
$f = 10; echo --$f; echo "< br>";
$f = 10; echo $f--; echo "< br>";
echo "< br>";
$g = 100; $h = 50;
if ($g == 100 and $h == 50) {
echo "Hello world!";
}
echo "< br>";
if ($g == 100 or $h == 80) {
echo "Hello world!";
}
echo "< br>";
if ($g == 100 xor $h == 80) {
echo "Hello world!";
}
echo "< br>";
if ($g == 100 && $h == 50) {
echo "Hello world!";
}
echo "< br>";
if ($g == 120 || $h == 50) {
echo "Hello world!";
}
echo "< br>";
if ($g !== 110 ) {
echo "Hello world!";
}
echo "< br>"; echo "< br>";
$txt1 = "Hello"; $txt2 = " world!"; echo $txt1 . $txt2;
echo "< br>";
$txt1 = "Hello"; $txt2 = " world!"; $txt1 .= $txt2; echo $txt1;
echo "< br>"; echo "< br>";
$j = array("a" => "red", "b" => "green"); $k = array("c" => "blue", "d" => "yellow");
print_r($j + $k); echo "< br>";
var_dump($j == $k); echo "< br>";
var_dump($j === $k); echo "< br>";
var_dump($j != $k); echo "< br>";
var_dump($j <> $k); echo "< br>";
var_dump($j !== $k); echo " < br>";
echo "< br>";
// if empty($user) = TRUE, set $status = "anonymous"
echo $status = (empty($user)) ? "anonymous" : "logged in";
echo("< br>");
$user = "Edgard Peeters";
// if empty($user) = FALSE, set $status = "logged in"
echo $status = (empty($user)) ? "anonymous" : "logged in";
echo("< br>");
echo("< br>");
// variable $user is the value of $_GET['user'] and 'anonymous' if it does not exist
echo $user = $_GET["user"] ?? "anonymous";
echo("< br>");
// variable $color is "red" if $color does not exist or is null
echo $color = $color ?? "red";
? >
code:
<?php
$l = date("H"); if ($l < "20") { echo "Have a good day!";}
print "< br>";
$m = date("H");
if ($m < "20") {
echo "Have a good day!";
} else {
echo "Have a good night!";
}
print "< br>";
$n = date("H");
echo "< a>The hour (of the server) is " . $n;
echo ", and will give the following message:< /a>" . "< br>";
if ($n < "10") {
echo "Have a good morning!";
} elseif ($n < "20") {
echo "Have a good day!";
} else {
echo "Have a good night!";
}
? >
code:
<?php
$favcolor = "red";
switch ($favcolor) {
case "red":
echo "Your favorite color is red!";
break;
case "blue":
echo "Your favorite color is blue!";
break;
case "green":
echo "Your favorite color is green!";
break;
default:
echo "Your favorite color is neither red, blue, nor green!";
}
?>
code:
<?php
$x = 1;
while($x <= 5) {
echo "The number is: $x < br>";
$x++;
}
echo("< br>");
$x = 0;
while($x <= 100) {
echo "The number is: $x < br>";
$x+=20;
}
echo("< br>");
$x = 1;
do {
echo "The number is: $x < br>";
$x++;
} while ($x <= 7);
echo("< br>");
$x = 6;
do {
echo "The number is: $x < br>";
$x++;
} while ($x <= 5);
echo("< br>");
for ($x = 0; $x <= 10; $x++) {
echo "The number is: $x < br>";
}
echo("< br>");
for ($x = 0; $x <= 100; $x+=20) {
echo "The number is: $x < br>";
}
echo("< br>");
$colors = array("red", "green", "blue", "yellow");
foreach ($colors as $value) {
echo "$value < br>";
}
echo("< br>");
$age = array("Peter"=>"35", "Alice"=>"37", "Staf"=>"43");
foreach($age as $x => $val) {
echo "$x = $val< br>";
}
echo("< br>");
for ($x = 0; $x < 10; $x++) {
if ($x == 4) {
break;
}
echo "The number is: $x < br>";
}
echo("< br>");
for ($x = 0; $x < 10; $x++) {
if ($x == 4) {
continue;
}
echo "The number is: $x < br>";
}
?>