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November 16, 2009 # 7:07 PM # Code, PHP Functions # 12 CommentsThe function switch() in PHP is used to execute different codes based on a variable’s value. This is used in place of the IF/ELSE IF statements. A default value is optional and, if specified, is used when no other option is matched. You must include a break; after each case or the following cases will all return true.
<?php
switch($var){
case "blue":
echo "You have selected the color blue.";
break;
case "green":
echo "You have selected the color green.";
break;
case "red":
echo "You have selected the color red.";
break;
case "yellow":
echo "You have selected the color yellow.";
break;
default:
echo "You have not chosen a color.";
}
?>
You can use this with forms and such to determine an action based on a submitted value as well! Here is an example using the switch() function in a form:
<form action="submit.php" method="post"> Select your gender: <select name="gender"> <option value="">Select one...</option> <option value="male">Male</option> <option value="female">Female</option></select> <input type="submit" name="submit" value="Submit" /> </form>
Now on our PHP side of the script (submit.php) we will use the switch() function to evaluate the value.
<?php
// submit.php
if($_POST['submit']){
$value = $_POST['gender'];
switch($value){
case "male":
echo "You are male. Thank you.";
break;
case "female":
echo "You are female. Thank you.";
break;
default:
echo "Please choose your gender.";
}
}
?>
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