Conditions switch case in PHP. Code example

The switch case construct is an alternative to using the if, elseif, else construct. The switch statement takes some expression and compares it to a set of values.

For example, let’s create a normal condition:

$a = 3;
if($a==1)     echo "1";
elseif($a==2) echo "2";
elseif($a==3) echo "3";
elseif($a==4) echo "4";

and now we will write down it already with use of switch:

$a = 3;
switch($a)
{
    case 1: 
        echo "1";
        break;
    case 2: 
        echo "2";
        break;
    case 3: 
        echo "3";
        break;
    case 4: 
        echo "4";
        break;
    default:// else
        echo "no number";
        break;
}

Alternative switch, operator match

Starting with version 8.0 PHP added support for another, similar construct – match. It allows you to optimize the switch construct. The match construct also takes an expression and compares it against a set of values.

For example, let’s say we have the following code:

$a = 2;
switch($a)
{
    case 1: 
        $operation = "1";
        break;
    case 2: 
        $operation = "2";
        break;
    default: 
        $operation = "3";
        break;
}
echo $operation;

now let’s write it down through match:

$a = 2;
$operation = match($a) {
    1 => "1",
    2 => "2",
    default => "3",
};
echo $operation;

unlike switch, the match construct returns some result. Therefore, after each comparable value, the => operator is placed, after which comes the returned result.

Shorted if - ternary operator PHP. Code example

May 4, 2022

Roman-tk