70 lines
1.9 KiB
Markdown
70 lines
1.9 KiB
Markdown
---
|
||
title: PHP Switch
|
||
---
|
||
## PHP Switch
|
||
|
||
The `switch` statement in PHP is similar to a series of `if ` statements on same expression. The `switch` statement is used to execute different actions at different conditions. The Syntax of the `switch` statement is follows
|
||
|
||
```
|
||
switch (expression) {
|
||
|
||
case label1:
|
||
// code block to be executed if there is a match with result of expression
|
||
break;
|
||
case label2:
|
||
// code block to be executed if there is a match with result of expression
|
||
break;
|
||
case label3:
|
||
// code block to be executed if there is a match with result of expression
|
||
break;
|
||
default:
|
||
// code block to be executed if there is no match with result of expression
|
||
|
||
}
|
||
|
||
```
|
||
When we run the program , the expression inside the `switch` statement is evaluated. The result of that expression is checked with corresponding labels if there is a match then corresponding `case` block is executed. If no match is found with any of the case statements, only the block of code following the `default` are executed.
|
||
|
||
Illustration of `switch` statement with an example
|
||
|
||
```
|
||
<?php
|
||
|
||
$i = 1
|
||
switch ($i) {
|
||
case 0:
|
||
echo "i equals 0";
|
||
break;
|
||
case 1:
|
||
echo "i equals 1";
|
||
break;
|
||
case 2:
|
||
echo "i equals 2";
|
||
break;
|
||
}
|
||
|
||
?>
|
||
|
||
```
|
||
The `switch` statement can also be used without `break` statement. In that case , statements after the matched cases will be executed. Below is an usage of `switch` statement without `break` statement.
|
||
|
||
```
|
||
<?php
|
||
switch ($i) {
|
||
case 0:
|
||
echo "i equals 0";
|
||
case 1:
|
||
echo "i equals 1";
|
||
case 2:
|
||
echo "i equals 2";
|
||
}
|
||
?>
|
||
|
||
/*output --> i equals 0i equals 1i equals 2 */
|
||
|
||
```
|
||
#### More Information:
|
||
[Switch Statement - PHP Documentation](http://php.net/manual/en/control-structures.switch.php)
|
||
|
||
[PHP5 Switch - W3Schools](https://www.w3schools.com/php/php_switch.asp)
|