配列3

    <?php
        $class1 = array("haruki","kaoru","hideto");
        $class2 = array("yuki","yuka","manami");
        $students = array($class1,$class2);
    ?>
    
    
    
    
    <?php                       //連想配列
        $result = array(
            "japanese" => 80,
            "math" => 75,
            "science" => 90,
            "history" => 85,
            "english" => 80
            );
    ?>
    
    
    
    
    <?php
        $result["japanese"] = 80;
        $result["math"] = 75;
        $result["science"] = 90;
        $result["history"] = 85;
        $result["english"] = 80;
        
        $result ["math"] = 85;    //mathの点数を上書き
        $result ["music"]  = 90;    //musicの点数を追加
        
        var_dump($result);    //確認
    ?>