Switch Statement in PHP

**Projectkmo** · 31-03-2009

PHP switch statement is used when one of the several options or a groups of options are to be executed based on some conditions. We can use several PHP if conditions with php if else but this is a better way of coding when we know one of the several options is correct. (Repeated checking by if condition can be avoided)

If you want to select one of many blocks of code to be executed, use the Switch statement.

The switch statement is used to avoid long blocks of if..elseif..else code.

Syntax

PHP Code:


switch (expression)

{

case label1:

  code to be executed if expression = label1;

  break;  

case label2:

  code to be executed if expression = label2;

  break;

default:

  code to be executed

  if expression is different 

  from both label1 and label2;

}

**Projectkmo** · 31-03-2009

A single expression (most often a variable) is evaluated once. The value of the expression is compared with the values for each case in the structure. If there is a match, the code associated with that case is executed. After a code is executed, break is used to stop the code from running into the next case. The default statement is used if none of the cases are true.

PHP Code:


<html>

<body>



<?php

switch ($x)

{

case 1:

  echo "Number 1";

  break;

case 2:

  echo "Number 2";

  break;

case 3:

  echo "Number 3";

  break;

default:

  echo "No number between 1 and 3";

}

?>



</body>

</html>

**Matellis** · 31-03-2009

PHP Code:


$destination = "Tokyo";

echo "Traveling to $destination<br />";

switch ($destination){

    case "Las Vegas":

        echo "Bring an extra $500";

        break;

    case "Amsterdam":

        echo "Bring an open mind";

        break;    

    case "Egypt":

        echo "Bring 15 bottles of SPF 50 Sunscreen";

        break;    

    case "Tokyo":

        echo "Bring lots of money";

        break;

    case "Caribbean Islands":

        echo "Bring a swimsuit";

        break;    

}