Question

在提交时检查“clearYes”单选按钮时，我正在努力清除阵列。它似乎很清楚，但只要我列出数组的内容，一切都会再次出现。

这是代码

<?php
session_start();

// Initialize an array for answers
if (!isset($_SESSION['songArr']))
    $_SESSION['songArr'] = array();
?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">

<head>
    <meta charset="utf-8">
</head>

<body>

    <form name="songform" action="" onsubmit=" return validateForm()" method="post">
        <table>
            <tr>
                <th>Song Name:</th>
                <th><input type="text" name="songName" size="20"></th>
            </tr>
            <tr>
                <th>Composer:</th>
                <th><input type="text" name="composer" size="20"></th>
            </tr>
            <tr>
                <th>Artist or Group:</th>
                <th><input type="text" name="artist" size="20"></th>
            </tr>
            <tr>
                <p><input name="radio1" type="radio" value="listSongs"> Show the list of songs? </p>
            </tr>
        </table>
        <p><input name="submit" type="submit" value="Submit Song" /> <input type="reset" value="Clear form" /></p>
        <p><input name="radio2" type="radio" value="clearNo" checked="checked"> Don't clear list. <input name="radio2" type="radio" value="clearYes">Clear list after submit.</p>
    </form>

</body>

<?php
if (!empty($_POST['submit'])) {
// Push the posted data into the session array
$_SESSION['songArr'][] = $_POST;
}
$listSongs= $_POST['radio1'];
// Display the data now
//if clearYes is selected
if ($listSongs == "listSongs") {
foreach($_SESSION['songArr'] as $array) {
    echo "<strong>Song name</strong>: {$array['songName']}<br>";
    echo "<strong>Composer</strong>: {$array['composer']}<br>";
    echo "<strong>Artists</strong>: {$array['artist']}<br><br>";
}
}
//if clearYes is selected
$resetArr= $_POST['radio1'];
if ($resetArr == "clearYes") {
unset($array);
$array = array();
session_start();
session_unset();
session_destroy();
session_write_close();
setcookie(session_name(),'',0,'/');
session_regenerate_id(true);
}
?>

</html>

Answer 1

您需要取消设置源数组：

替换：

 unset($array);

使用：

 unset($_SESSION['songArr']);

希望它有所帮助。

php数组不会清楚

1 个答案: