PHPの条件文 PHPスイッチケース それは何ですか?またどのように使用されますか?このレッスンでは PHPスイッチケース このトピックについて説明します。

PHP Switch Case ステートメント それ以外の場合は PHP It is used to execute code based on different conditions, such as expression.以下の例で構文を見てみましょう。

switch (n) {
  case label1:
     //n=label1'e eşitse çalıştırılacak kodlar
    break;
  case label2:
    //n=label2'e eşitse çalıştırılacak kodlar
    break;
  case label3:
    //n=label3'e eşitse çalıştırılacak kodlar
    break;
  default:
    //n hiçbir label'e eşit değilse çalıştırılacak kodlar
}

PHP Switch Case works like this: First, we have an expression (which is usually a variable) that is evaluated once. The value of the expression is compared with the value in each structure. If it matches a value in a structure, the code block in that structure is executed. If no value matches, the code block in the default statement is executed. The break statement is used to prevent the code from automatically entering the next structure.

PHP スイッチの事例

では、実際の例を見てみましょう。 We can replace n in the previous example with a variable, and replace label1 with data. Whichever label the variable we substituted for N is equal to, that code block will be executed. If it is not equal to any of them, the default code block under default will be executed.

$favorite_movie = 'the matrix';
switch ($favorite_movie) {
  case 'inception':
    echo 'Favori filmin: inception';
    break;
  case 'the matrix':
    echo 'Favori filmin: the matrix';
    break;
  case 'v for vendetta':
    echo 'Favori filmin: v for vendetta';
    break;
  default:
    echo 'Favori filmin yok';
}
// Çıktı: Favori filmin: the matrix

上記で実際の例を作成しました。 Now let's do another example to reinforce what we have learned.

$lucky_number = null;
switch ($lucky_number) {
  case 4:
    echo 'Favori sayı: 4';
    break;
  case 6:
    echo 'Favori sayı: 6';
    break;
  case 8:
    echo 'Favori sayı: 8';
    break;
  default:
    echo 'Favori sayı yok';
}
// Çıktı: Favori sayı yok

PHP スイッチケースの代替構文

We learned in the previous lesson that we can use alternative syntax in PHP conditional statements.このレッスンの最後の部分では PHPスイッチケース 代替構文を学びます。

$number = 3;
switch ($number): 
     case 1: 
    	echo 'number is 1';
        break;
     case 2: 
    	echo 'number is 2';
        break;
     case 3: 
    	echo 'number is 3';
        break;
     default:
        echo 'number is null';   
endswitch;
// Çıktı: number is 3

PHPスイッチケースIn the alternative syntax, instead of opening curly brackets after the switch, we put a colon. PHPスイッチケース エンドスイッチ。 instead of closing the curly brackets when the expression ends;という表現を使います。