Question

我对css有点问题。我必须创建一个带有表单的页面，您可以通过单选按钮和提交按钮设置背景颜色。但是我怎么能真正改变php中的css background-color？

<?php
            if (isset($_POST['set'])) {
                $color = $_POST['color'];
            } else {
                $color = "";
            }
        ?>

        <form method="post" action="">
            <input type="radio" name="color" value="Red"
                <?php if($color == "Red") { echo "checked='checked'"; } ?>>Red
            <input type="radio" name="color" value="Green"
                <?php if($color == "Green") { echo "checked='checked'"; } ?>>Green
            <input type="radio" name="color" value="Blue"
                <?php if ($color == "Blue") { echo "checked='checked'"; } ?>>Blue
            <input type="radio" name="kleur" value="Pink"
                <?php if ($color == "Pink") { echo "checked='checked'"; } ?>>Pink

            <br>
            <br>

            <input type="submit" name="set" value="SET">
        </form>

Answer 1

将body css用于body标记

 <?php
                if (isset($_POST['set'])) {
                    $color = $_POST['color'];
                } else {
                    $color = "";
                }
            ?>
         <html>
         <body <?php echo !empty($color) ? 'style="background:'.$color.'"' : ''; ?>>
            <form method="post" action="">
                <input type="radio" name="color" value="Red"
                    <?php if($color == "Red") { echo "checked='checked'"; } ?>>Red
                <input type="radio" name="color" value="Green"
                    <?php if($color == "Green") { echo "checked='checked'"; } ?>>Green
                <input type="radio" name="color" value="Blue"
                    <?php if ($color == "Blue") { echo "checked='checked'"; } ?>>Blue
                <input type="radio" name="kleur" value="Pink"
                    <?php if ($color == "Pink") { echo "checked='checked'"; } ?>>Pink

                <br>
                <br>

                <input type="submit" name="set" value="SET">
            </form>
           </body>

用php改变css背景颜色

1 个答案: