freeCodeCamp/guide/english/php/switch-statement/index.md

title
Switch statement

Switch

Switch is a selection statement that will select a switch statement and execute it from the list of candidates. Switch consists of case and an optional default. The execution can be stopped by using a break or return.

Syntax

switch(x)
{
    case value1:
      //execute if x = value1
      break;
    case value2:
      //execute if x = value2
      break;
      
    ...
    
    default:
      execute if x is different with cases above
}

Example

<?php
//initialize with a random integer within range
$diceNumber = mt_rand(1, 6);

//initialize
$numText = "";

//calling switch statement
  switch($diceNumber) 
  {
  case 1:
    $numText = "One";
    break;
  case 2:
    $numText = "Two";
    break;
  case 3:
  case 4:
    // case 3 and 4 will go to this line
    $numText = "Three or Four";
    break;
  case 5:
    $numText = "Five";
    echo $numText;
    // break; //without specify break or return it will continue execute to next case.
  case 6:
    $numText = "Six";
    echo $numText;
    break;
  default:
    $numText = "unknown";
  }
  
  //display result
  echo 'Dice show number '.$numText.'.';

?>

Output

if case is 1
> Dice show number One.

if case is 2
> Dice show number Two.

if case is 3
> Dice show number Three or Four.

if case is 4
> Dice show number Three or Four.

if case is 5
> FiveSixDice show number Six.

if case is 6
> SixDice show number Six.

if none of the above
> Dice show number unknown.