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Web Technologies-I

Notes
switch ($myState) {

case “In”:
echo “You are from India”;
break;
case “VT”:
echo “You are from Vermont”;
break;
case “MA”:

echo “You are from Massachussetts”;
break;
default:
echo “You are not from around here”;
break;
}
Let us look at the various elements.

Case Statement
The case keyword is a label; it marks a point in the code to do something. Specifically it marks
the point in the code to begin executing statements if the value of the expression being evaluated
by the switch statement is equal to the value immediately following the case keyword or if the
expression following the case keyword evaluates to true. The colon marks the end of the label.
The entire label should be on one line.

In PHP, the case statement takes an expression which must equate to true for the following code
to be run. If you are doing simple equality then you can just provide the value you are checking
for and it assumes that the expression is testing the switch expression against the value in question
for equality. However, by allowing expressions, you can also test for other conditions, such as
greater than and less than relationships. When using expressions, the expression you are testing
against must be repeated in the case statement.

switch ($someNumber) {
case 0:
echo “Zero is not a valid value.”;
break;
case $someNumber < 0:
echo “I cannot use negative numbers.”;

break;
default:
echo “Ready to compute.”;
break;
}

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