在php或javascript中单击按钮后禁用它

如何解决在php或javascript中单击按钮后禁用它

我正在尝试用PHP中的字母按钮制作一个hang子手游戏。问题是我希望在单击并处理了字母之后禁用作为字母输入的按钮，但是我尝试过的所有解决方案都无法正常工作，我需要在其他部分保持活动状态直到下一个会话之前，单击已禁用的字母。代码在下面，有什么想法吗？

<?PHP
    function plateup (){
        $plate = '';
        for ($i=0; $i < strlen($_SESSION['mystery']) ; $i++) {
            array_push($_SESSION['mysteryletters'],$_SESSION['mystery'][$i]);
            
            if (in_array($_SESSION['mystery'][$i],$_SESSION['guesses'])) {
            $plate = $plate.$_SESSION['mystery'][$i].' ';
            } else {
                $plate = $plate.'_ ';
            }
        }
        echo '<h2>'.$plate.'</h2>';
    }
    
    if (($_SESSION['numwrong'] < 5)&&(!$_SESSION['won'])){
        ?>
    
        <form name="drawer" action="./" method="post">
            <input type="submit"  class="letter" name="letter" value="A">
            <input type="submit" class="letter" name="letter" value="B">
            <input type="submit" class="letter" name="letter" value="C">
            <input type="submit" class="letter" name="letter" value="D">
            <input type="submit" class="letter" name="letter" value="E">
            <input type="submit" class="letter" name="letter" value="F">
            <input type="submit" class="letter" name="letter" value="G">
            <input type="submit" class="letter" name="letter" value="H">
            <input type="submit" class="letter" name="letter" value="I">
            <input type="submit" class="letter" name="letter" value="J">
            <input type="submit" class="letter" name="letter" value="K">
            <input type="submit" class="letter" name="letter" value="L">
            <input type="submit" class="letter" name="letter" value="M">
            <input type="submit" class="letter" name="letter" value="N">
            <input type="submit" class="letter" name="letter" value="O">
            <input type="submit" class="letter" name="letter" value="P">
            <input type="submit" class="letter" name="letter" value="Q">
            <input type="submit" class="letter" name="letter" value="R">
            <input type="submit" class="letter" name="letter" value="S">
            <input type="submit" class="letter" name="letter" value="T">
            <input type="submit" class="letter" name="letter" value="U">
            <input type="submit" class="letter" name="letter" value="V">
            <input type="submit" class="letter" name="letter" value="W">
            <input type="submit" class="letter" name="letter" value="X">
            <input type="submit" class="letter" name="letter" value="y">
            <input type="submit" class="letter" name="letter" value="z">
            </form>
    
    <?PHP
    } else {
        ?>
    <form name="redrawer" action="" method="post">
        <input type="submit" name="newgame" value="New Game">
    </form>
    <?PHP
    }
        
    
    if (isset($_POST['letter'])) {
        
        if (strlen($_POST['letter'])>0){
            $letter = ($_POST['letter'][0]);
        
        if (!in_array($letter,$_SESSION['guesses'])){
                array_push($_SESSION['guesses'],$letter);
            }
            
            if (!in_array($letter,$_SESSION['mysteryletters'])){
                $_SESSION['numwrong'] += 1;
            }
        }
    } else {
        $_SESSION['numwrong'] = 0;
        $_SESSION['guesses'] = [];
        $_SESSION['won'] = false;
        
        $lines = file('words.txt');
        
        $_SESSION['mystery'] = trim($lines[array_rand($lines)]);
        $_SESSION['mysteryletters'] = array_unique(str_split($_SESSION['mystery']));        
    }
    
    echo '<p>Guessed: [ '.implode(" ",$_SESSION['guesses']).' ]';
        
    plateup();
?>

解决方法

禁用HTML元素需要在FRONTEND上进行，PHP不能这样做，因为它只能在BACKEND上工作。您可以让JS禁用前端部分，并且可以将last pressed button保存在PHP Session中，这样它就不能在后台使用了。

我确信还有其他方法，具体取决于您实际需要做的事情。