PHP Switch語句

PHP switch語句用於從多個條件執行一個語句。 它的工作原理像PHP的if-else-if語句。

語法

switch(expression){
    case value1:
         //code to be executed
        break;
    case value2:
         //code to be executed
         break;
        ......
    default:
        code to be executed if all cases are not matched;
}

PHP switch流程圖

PHP Switch示例代碼

<?php
    $num=20;
    switch($num){
        case 10:
            echo("number is equals to 10");
            break;
        case 20:
            echo("number is equal to 20");
            break;
        case 30:
            echo("number is equal to 30");
            break;
        default:
            echo("number is not equal to 10, 20 or 30");
    }
?>

執行上面代碼得到以下結果 -

number is equal to 20