运行基于 mysql 查询的多个循环

Question

我正在学习 PHP 我正在为电视节目制作个人剧集跟踪器。我现在的问题是，我不知道如何打印出按季节分隔的 "pretty list"。现在，一个系列的每一集都打印有来自 mysql 查询的循环。这里还有一个 "watched" 函数，我需要用它来检查用户是否在循环中标记了剧集。

如何一次循环一季而不是每一集？我在另一个 "Series" table 中得到了季节的数量 as 和 int 如果这样更容易的话。

// Get episodes from database
$list_sql = "SELECT * FROM episodes WHERE series_id = '".$_GET['id']."' ORDER BY `episodes`.`season` ASC, `episodes`.`season_episode` ASC LIMIT 2000";
$list_query = mysqli_query($con, $list_sql) or die(mysqli_errno($con));



while ($row = mysqli_fetch_assoc($list_query)) {

    // GET INFO ON WHEN EPISODE WAS VIEWED
    $when_watched_sql = "SELECT date_watched FROM watched WHERE episode_id = '".$row['id']."'";
    $when_watched_query = mysqli_query($con, $when_watched_sql);
    $when_watched_result = mysqli_fetch_assoc($when_watched_query);

// IS EPISODE WATCHED? If yes, make CHECKBOX CHECKED
    $watched_sql = "SELECT watched FROM watched WHERE episode_id = '".$row['id']."' AND watched = '1'";
    $watched = mysqli_query($con, $watched_sql);

    if(mysqli_num_rows($watched)>0) {


        // One row returned, episode is watched
        $watched_box = "checked";
    } else {
        // No rows returned, episode is not watched
        $watched_box = "";
    }


    print("Watched: <input type='checkbox' name='watched[]' value='".$row['id']."' $watched_box  />&nbsp; Season: ".$row['season']." Episode: ".$row['season_episode']." ".$row['name']." <br>");
}

我在这里也可能有很多错误的做事方式，我确实喜欢一些建设性的提示和技巧，以学习如何以正确的方式做这一切。

Answer 1

题外话：

首先，在您的代码中检查该剧集何时被观看，然后检查它是否被观看（根据您的评论）。哪个对我来说没有意义？

所以我建议结合使用 2 个查询：

$watched_sql = "SELECT watched,date_watched FROM watched WHERE episode_id = '".$row['id']."' AND watched = '1'";

如果无论出于何种原因这对您的情况不起作用，我仍然建议您在确定观看日期后检查观看日期：

if(mysqli_num_rows($watched)>0) {

    $when_watched_sql = "SELECT date_watched FROM watched WHERE episode_id = '".$row['id']."'";
    $when_watched_query = mysqli_query($con, $when_watched_sql);
    $when_watched_result = mysqli_fetch_assoc($when_watched_query);
    // One row returned, episode is watched
    $watched_box = "checked";
} else {
    // No rows returned, episode is not watched
    $watched_box = "";
}

主题：

我会说你需要得到 $watched_box 作为一个 array.I 似乎不理解你 mysql table 结构所以我有点不对劲.我现在无法测试这些东西，但我想说你需要像这样做：

$i=0;
$watched_box=array();
while ($row = mysqli_fetch_assoc($list_query)) {

    // GET INFO ON WHEN EPISODE WAS VIEWED
$when_watched_sql = "SELECT date_watched FROM watched WHERE episode_id = '".$row['id']."'";
$when_watched_query = mysqli_query($con, $when_watched_sql);
$when_watched_result = mysqli_fetch_assoc($when_watched_query);

// IS EPISODE WATCHED? If yes, make CHECKBOX CHECKED
$watched_sql = "SELECT watched FROM watched WHERE episode_id = '".$row['id']."' AND watched = '1'";
$watched = mysqli_query($con, $watched_sql);

    if(mysqli_num_rows($watched)>0) {


        // One row returned, episode is watched
        $watched_box[$i] = "checked";
    } else {
        // No rows returned, episode is not watched
        $watched_box[$i] = "";
    }
    $i++;
    var_dump($i);

我 99% 确定这不是可以立即为您工作的代码，因为我没有完全了解您的数据库结构，也无法对其进行测试。您需要对此进行一些更改，我认为这就是您想要的方式。有一个 计数器 和一个数组。在 while 循环之后尝试 var_dump($watched_box);，看看它会显示什么

Answer 2

在@Loko 的帮助下，我解决了这个问题。我最初的问题是如何每季打印一个包含该季所有剧集的列表，而不是仅包含剧集的一大列表。

我对此的解决方案是一个 FOR 循环，它根据 MySQL 数据库中的系列信息中设置的季节数循环遍历 X 个季节。

    // Test new print loop (Thanks Loko)
?><form method="post" action="episode_list.php?id=<?php echo $series_id;?>"><?php
// Make a loop that iterates X amount of SEASONS based on mysql count result
$season = $season_count_array['seasons'];
// LOOP, start with season 1, if below $season (Amount of seasons), continue and add 1 to variable until loop reaches amount of seasons
for($seasons = 1; $seasons <= $season; $seasons++) {
    $season_episodes_sql = "SELECT * FROM episodes WHERE season = '".$seasons."' AND series_id = '".$_GET['id']."' ORDER BY season_episode";
    $season_episodes_query = mysqli_query($con, $season_episodes_sql);

    // Loop through episodes of chosen season
    while ($row = mysqli_fetch_assoc($season_episodes_query)) {

        // Is episode watched?
        $watched_sql = "SELECT watched FROM watched WHERE episode_id = '".$row['id']."' AND watched = '1'";
        $watched = mysqli_query($con, $watched_sql);

        if(mysqli_num_rows($watched)>0) {

            // One row returned, episode is watched
            $watched_box = "checked";
        } else {
            // No rows returned, episode is not watched
            $watched_box = "";
        }

        // Allright, let's print
        print("Sett: <input type='checkbox' name='watched[]' value='".$row['id']."' $watched_box  />&nbsp; Sesong: ".$row['season']." Episode: ".$row['season_episode']." ".$row['name']." <br>");

    }
    // Here I can add what I want as a spacer between printed seasons, just a break, for now.
    echo '<br>';

}

运行基于 mysql 查询的多个循环

Running multiple loops based on mysql query

php

mysql

foreach

loops

运行 基于 mysql 查询的多个循环

Running multiple loops based on mysql query

php

mysql

foreach

loops

运行基于 mysql 查询的多个循环