Need Codings for PHP Switch Statement?

**NGV BalaKrishna** · 27-01-2010

Can someone tell me why the switch statements are used in PHP. Since, I am very new to PHP, please provide me the detailed information about the same. Also explain me why it is used.? Also please provide me with the Codings for PHP Switch Statement. This is my first time on this forum. So, kindly ignore my mistakes. Hope that someone can help me soon.!!

**CodGuru** · 27-01-2010

I am assuming that you have used the if statement in other programming language. Now, in PHP the switch statement is similar to a series of IF statements on the same expression. Hope that you cleared the concept of the Switch Statement in PHP. In many occasions, you may want to compare the same variable (or expression) with many different values, and execute a different piece of code depending on which value it equals to. For such conditions the switch statement is used. Also the important thing is that The switch statement executes line by line.

**void** · 27-01-2010

I think that looking at the Syntax, your doubt of the Switch Statements will be solved. The Syntax of the Switch Statements will be like this :

Code:

switch (n)
{
case text1:
  code to be executed if n=text1;
  break;
case text2:
  code to be executed if n=text2;
  break;
default:
  code to be executed if n is different from both text1 and text2;
}

**Warner** · 27-01-2010

In the following coding, I have tried to explain how the Switch Statement works. Initially we are having a single expression n, which is evaluated once. The value of the expression is then compared with the values for each case in the structure. The block of code associated with that case is executed, if there is a match. Then i have use the break to prevent the code from running into the next case automatically. And if no match is found, then default statement is used. Here is coding for the same :

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>

**Viensterrr** · 27-01-2010

This is the simple example of a coding of Switch Statement :

Code:

<?php
if ($i == 0) {
    echo "i equals 0";
} elseif ($i == 1) {
    echo "i equals 1";
} elseif ($i == 2) {
    echo "i equals 2";
}

switch ($i) {
    case 0:
        echo "i equals 0";
        break;
    case 1:
        echo "i equals 1";
        break;
    case 2:
        echo "i equals 2";
        break;
}
?>

**MELTRONICS** · 27-01-2010

In the following example, I have tried you to explain that the Switch Statement allows the use of the strings. Here is an example for illustrate that :

Code:

<?php
switch ($i) {
    case "mango":
        echo "i is mango";
        break;
    case "bike":
        echo "i is bike";
        break;
    case "car":
        echo "i is car";
        break;
}
?>