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  • php页面跳转

    php中如何跳转,我们看下面的代码

    form3.php

    <html>
        <head></head>
        <title></title>
        <script type="text/css"></script>
            <form action="formprocess3.php" method="post">
                <body>
                    <table><tr>
                        <td>Name</td>
                        <td><input type="text" name="name" /></td>
                    </tr>
                    <tr>
                        <td>Movie type</td>
                        <td><select name="movie_type" id="movie_type">
                            <option value="">Select a movie type...</option>
                            <option value="Action">Action</option>
                            <option value="Drama">Drama</option>
                            <option value="Comedy">Comedy</option>
                            <option value="Sci-Fi">Sci-Fi</option>
                            <option value="War">War</option>
                            <option value="Other">Other</option></select></td>
                    </tr>
                    <tr>
                        <td>Item type</td>
                        <td>
                        <input type="radio" name="type" value="movie" checked="checked" />Movie<br />
                        <input type="radio" name="type" value="actor"/>Acotr<br />
                        <input type="radio" name="type" value="director"/>Director<br />
                        </td>
                    </tr>
                    <tr>
                        <td></td>
                        <td><input type="checkbox" name="debug" id="debug" checked="checked" />
                        Display Debug Info
                        </td>
                    </tr>
                    <tr>
                        <td colspan="2" style="text-aligh:center">
                        <input type="submit" name="submit" value="Search" />
                        <input type="submit" name="submit" value="Add" />
                        </td>
                        <td></td>
                    </tr></table>
                </body>
            </form>
    </html>

    formprocess3.php

    <?php
    if($_POST["type"] == 'movie' && $_POST["movie_type"] == '')
    {
        header('Location:form3.php');
    }
    ?>
    <html>
        <head>
            <title><?php echo $_POST['submit'].' '.$_POST['type'].' '.$_POST['name'];?></title>
        </head>
        <body>
        <?php
        if(isset($_POST['debug'])){
            echo'<pre>';
            print_r($_POST);
            echo'</pre>';
        }
        else{
            echo 'post';
        }
        $name = ucfirst($_POST['name']);
        if($_POST['type'] == 'movie'){
            $foo=$_POST['movie_type'].' '.$_POST['type'];
        }
        else{
            $foo = $_POST['type'];
        }
        
        echo '<p>You are '. $_POST['submit'] .'int';
        echo ($_POST['submit'] == 'Search')? 'for':'';
        echo 'a '. $foo .' named '. $name .'</p>';
        ?>
        </body>
    </html>

    注意这一句

    if($_POST["type"] == 'movie' && $_POST["movie_type"] == '')
    {
    header('Location:form3.php');
    }

    如果选择movie类型并且传入的movie_type为空则返回到form3.php页面中header()方法参数是以分号分割的字符串前面是Location,后面是要跳转的页面地址。

    head()函数是输出一个原始的http头,php请求页面的时候会首先自动输出http头,并且值输出一次,所以这个方法必须在html文件的开头使用,前面不能有echo,print之类的输出语句,也不能有html代码和空格之类的,否则有可能调用失败。

     还有一点这里有两个submit按钮但是value的值不一样,我们可以根据这个值来进行不同的逻辑处理。

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  • 原文地址:https://www.cnblogs.com/tylerdonet/p/3702588.html
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