单击时从会话数组中取消设置某些项目？答案

【问题标题】：Unset certain items from session array when they're clicked?单击时从会话数组中取消设置某些项目？
【发布时间】：2015-07-08 04:24:05
【问题描述】：

我基本上在寻找的是能够在单击某个项目时从数组中删除该项目，例如...如果我点击“两个”，它将消失。

演示：http://query.notesquare.me

代码：

<form method="post">
    <input type="text" id="input-create-playlist" placeholder="Playlist Name" name="create_playlist" />
    <input type="submit" id="button-create-playlist" value="Create Playlist" />
</form>

<?php
    ini_set("session.save_path", "/home/kucerajacob/public_html/query.notesquare.me/test-sessions");
    session_start();

    if ($_SERVER['REQUEST_METHOD'] == 'POST') {
        $create_playlist = $_POST['create_playlist'];

        $_SESSION['user_playlists'][] = $create_playlist;
    }

    $playlists = array("One", "Two", "Three");

    if (isset($_SESSION['user_playlists'])) {
        for ($i = 0; $i < count($_SESSION['user_playlists']); $i++) {
            array_unshift($playlists, $_SESSION['user_playlists'][$i]);
        }
    }

    $_SESSION['main'] = $playlists;

    for ($i = 0; $i < count($playlists); $i++) {
        echo $playlists[$i] . "<br />";
    }
?>

【问题讨论】：

标签： php html arrays session unset

【解决方案1】：

试试下面：

for ($i = 0; $i < count($playlists); $i++) {
       // echo $playlists[$i] . "<br />";
  printf('<a href="php_pagename.php?query=%1$s">%1$s</a><br/>', $playlists[$i]);
}

if ($_GET['query'])
{
unset($playlists['query']);
}

【讨论】：

【解决方案2】：

有可能，您还需要处理该请求。如果您想要发布click，那么在其旁边添加一个简单的<button> 就足够了。

在渲染标记时，（当然使用会话数组）使用可用于取消设置值的键。

<?php

// initialization
if(empty($_SESSION['user_playlists'])) {
    $_SESSION['user_playlists'] = array("One", "Two", "Three");
}

if(isset($_POST['add'], $_POST['create_playlist'])) {
    // handle additions
    $_SESSION['user_playlists'][] = $_POST['create_playlist'];
}

if(isset($_POST['remove'])) {
    // handle remove
    $key = $_POST['remove'];
    unset($_SESSION['user_playlists'][$key]);
}

?>

<form method="post">
    <input type="text" id="input-create-playlist" placeholder="Playlist Name" name="create_playlist" />
    <input type="submit" id="button-create-playlist" name="add" value="Create Playlist" />
    <hr/>
    <?php foreach($_SESSION['user_playlists'] as $k => $p): ?>
        <?php echo $p; ?>&nbsp;<button type="submit" name="remove" value="<?php echo $k; ?>">Remove</button><br/>
    <?php endforeach; ?>
</form>

Sample Demo

【讨论】：

谢谢你！您也解决了我遇到的一些隐藏的内在问题！