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<?php
// If statement example
$num = 10;
if ($num > 0) {
    echo "The number is positive.";
}

// If-else statement example
$num = -5;
if ($num > 0) {
    echo "The number is positive.";
} else {
    echo "The number is not positive.";
}

// Switch statement example
$day = "Tuesday";
switch ($day) {
    case "Monday":
        echo "Today is Monday.";
        break;
    case "Tuesday":
        echo "Today is Tuesday.";
        break;
    case "Wednesday":
        echo "Today is Wednesday.";
        break;
    default:
        echo "Today is not Monday, Tuesday, or Wednesday.";
}
?>