How to use the switch statement in PHP?

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switch (expression) {
    case value1:
        //code to execute if expression matches value1
        break;
    case value2:
        //code to execute if expression matches value2
        break;
    case value3:
        //code to execute if expression matches value3
        break;
    default:
        //code to execute if none of the cases match
}

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$day = "Monday";

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 a weekday";
}