使用多维数组的 PHP 内容旋转器答案

【问题标题】：PHP Content Rotator Using Multidimensional Arrays使用多维数组的 PHP 内容旋转器
【发布时间】：2015-10-19 19:49:53
【问题描述】：

已解决：请查看我的回答，了解我是如何解决问题的。

我不确定这是否可行，因为我对数组了解不多，但这里什么都没有。

我想在我的网站上添加广告。

我想我可以找到一种方法来实现多维数组来控制内容。

我想出了这个：

$ads = array(
            "ad1" => array(
               title => "Advertisement Title",
               url => "http://example.com",
               image => "http://example.com/images/example.jpg",
               description => "Advertisement Description"),
            "ad2" => array(
               title => "Advertisement Title",
               url => "http://example.com",
               image => "http://example.com/images/example.jpg",
               description => "Advertisement Description"),
            "ad3" => array(
               title => "Advertisement Title",
               url => "http://example.com",
               image => "http://example.com/images/example.jpg",
               description => "Advertisement Description")
);

我通过语法检查器运行了这段代码，没有任何错误，所以我认为我至少在正确的轨道上。

我不明白的是如何编写一个随机选择其中一个广告的foreach循环。

我需要将"ad1" => array( 更改为ad[1] => array( 吗？

我没有使用太多数组，所以我不知道如何在 for each 循环中定位它的特定部分。

我希望提出一个 foreach 循环，它会输出如下内容：

<a href="UrlFromArray"><img src="ImageSrcFromArray" alt="TitleFromArray">

<br>

<p>DescriptionFromArray</p>

这可以实现吗？

编辑和更新：

function displayAds728x90() {
 $ads = array(
             "ad1" => array(
                'title' => "Advertisement Title",
                'url' => "http://example.com",
                'image' => "http://example.com/images/example.jpg",
                'description' => "Advertisement Description"),
             "ad2" => array(
                'title' => "Advertisement Title",
                'url' => "http://example.com",
                'image' => "http://example.com/images/example.jpg",
                'description' => "Advertisement Description"),
             "ad3" => array(
                'title' => "Advertisement Title",
                'url' => "http://example.com",
                'image' => "http://example.com/images/example.jpg",
                'description' => "Advertisement Description")
            );
            $randomAd = array_rand($ads);
             echo '<a href="'.$randomAd->url.'" target="_blank">';
             echo '<img src="'.$randomAd->image.'" alt="'.$randomAd->title.'">';
             echo '</a>';
             echo '<p>';
             echo $randomAd->description;
             echo '</p>';

}
displayAds728x90();

根据 Dynelight 给出的答案，我想出了上面的代码。

现在我唯一的问题是我收到以下错误：

Sorry, an error happened. Please try again later
Error 8 : Trying to get property of non-object in /home/jollyrogerpcs/public_html/includes/adRotator728_90.php on line 23
 Sorry, an error happened. Please try again later
Error 8 : Trying to get property of non-object in /home/jollyrogerpcs/public_html/includes/adRotator728_90.php on line 24
 Sorry, an error happened. Please try again later
Error 8 : Trying to get property of non-object in /home/jollyrogerpcs/public_html/includes/adRotator728_90.php on line 24
 Sorry, an error happened. Please try again later
Error 8 : Trying to get property of non-object in /home/jollyrogerpcs/public_html/includes/adRotator728_90.php on line 27

让您知道我的完整代码是哪些行号：

<img src="http://www.example.com/images/your_banner_here.png">

<?php
function displayAds728x90() {
 $ads = array(
             "ad1" => array(
                'title' => "Advertisement Title",
                'url' => "http://example.com",
                'image' => "http://example.com/images/example.jpg",
                'description' => "Advertisement Description"),
             "ad2" => array(
                'title' => "Advertisement Title",
                'url' => "http://example.com",
                'image' => "http://example.com/images/example.jpg",
                'description' => "Advertisement Description"),
             "ad3" => array(
                'title' => "Advertisement Title",
                'url' => "http://example.com",
                'image' => "http://example.com/images/example.jpg",
                'description' => "Advertisement Description")
            );
            $randomAd = array_rand($ads);
             echo '<a href="'.$randomAd->url.'" target="_blank">';
             echo '<img src="'.$randomAd->image.'" alt="'.$randomAd->title.'">';
             echo '</a>';
             echo '<p>';
             echo $randomAd->description;
             echo '</p>';

}
displayAds728x90();
?>

关于导致这些错误的原因有什么想法吗？

更新 2：

编辑了以下部分并添加了一些缺失的代码：

$randomAd = array_rand($ads);
             echo '<a href="'.$ads->$randomAd->url.'" target="_blank">';
             echo '<img src="'.$ads->$randomAd->image.'" alt="'.$ads->$randomAd->title.'">';
             echo '</a>';
             echo '<p>';
             echo $ads->$randomAd->description;
             echo '</p>';

在$ads 上执行var_dump 并得到以下结果：

array(3) { ["ad1"]=> array(4) { ["title"]=> string(19) "Advertisement Title" ["url"]=> string(18) "http://example.com" ["image"]=> string(37) "http://example.com/images/example.jpg" ["description"]=> string(25) "Advertisement Description" } ["ad2"]=> array(4) { ["title"]=> string(19) "Advertisement Title" ["url"]=> string(18) "http://example.com" ["image"]=> string(37) "http://example.com/images/example.jpg" ["description"]=> string(25) "Advertisement Description" } ["ad3"]=> array(4) { ["title"]=> string(19) "Advertisement Title" ["url"]=> string(18) "http://example.com" ["image"]=> string(37) "http://example.com/images/example.jpg" ["description"]=> string(25) "Advertisement Description" } }

关闭上面发布的完整页面代码，错误现在是：

 Sorry, an error happened. Please try again later
Error 8 : Trying to get property of non-object in /home/jollyrogerpcs/public_html/includes/adRotator728_90.php on line 23
 Sorry, an error happened. Please try again later
Error 8 : Trying to get property of non-object in /home/jollyrogerpcs/public_html/includes/adRotator728_90.php on line 23
 Sorry, an error happened. Please try again later
Error 8 : Trying to get property of non-object in /home/jollyrogerpcs/public_html/includes/adRotator728_90.php on line 24
 Sorry, an error happened. Please try again later
Error 8 : Trying to get property of non-object in /home/jollyrogerpcs/public_html/includes/adRotator728_90.php on line 24
 Sorry, an error happened. Please try again later
Error 8 : Trying to get property of non-object in /home/jollyrogerpcs/public_html/includes/adRotator728_90.php on line 24
 Sorry, an error happened. Please try again later
Error 8 : Trying to get property of non-object in /home/jollyrogerpcs/public_html/includes/adRotator728_90.php on line 24
 Sorry, an error happened. Please try again later
Error 8 : Trying to get property of non-object in /home/jollyrogerpcs/public_html/includes/adRotator728_90.php on line 27
 Sorry, an error happened. Please try again later
Error 8 : Trying to get property of non-object in /home/jollyrogerpcs/public_html/includes/adRotator728_90.php on line 27

【问题讨论】：

标签： php arrays object multidimensional-array rotator

【解决方案1】：

foreach 函数用于遍历数组的所有元素。您想获取数组的随机元素。看看这个功能，也许对你有用：

http://php.net/manual/en/function.array-rand.php

你随机获取elemenet并像这样引用它：

<?php $random_element = array_rand ( $ads); ?>

<a href="<?php echo $ads->$random_element->url ?>">
<img src="<?php echo $ads->$random_element->image ?>" alt="<?php echo $ads->$random_element->title ?>"></a>
<p><?php echo $ads->$random_element->description; ?></p>

【讨论】：

我按照你的建议想出了一个代码。我现在只是收到错误，这意味着它正在进行中:) 请查看我的编辑？
php.net/array_rand "从数组中选择一个或多个随机条目，并返回随机条目的键（或多个键）。"
@Jessica 它正在选择它们 :) 但是在我的代码中的某个地方我在尝试 echo 键值时仍然有错误:) 我确信这只是一个简单的修复。
它正在选择一个 KEY。然后，您尝试将其用作对象。
我不知道如何解决这个问题。我尝试过阅读，但我尝试过的没有任何效果。

【解决方案2】：

我想通了。我将其发布为答案，以防其他用户遇到类似问题并且可以使用我的问题和答案作为帮助:)

完整的工作代码：

function displayAds728x90() {
 $ads = array(
             "ad1" => array(
                'title' => "Advertisement Title",
                'url' => "http://example.com/1",
                'image' => "http://example.com/images/example.jpg",
                'description' => "Advertisement Description"),
             "ad2" => array(
                'title' => "Advertisement Title",
                'url' => "http://example.com/2",
                'image' => "http://example.com/images/example.jpg",
                'description' => "Advertisement Description"),
             "ad3" => array(
                'title' => "Advertisement Title",
                'url' => "http://example.com/3",
                'image' => "http://example.com/images/example.jpg",
                'description' => "Advertisement Description")
            );
            $randomAd = array_rand($ads);
             echo '<a href="'.$ads[$randomAd]['url'].'" target="_blank">';
             echo '<img src="'.$ads[$randomAd]['image'].'" alt="'.$ads[$randomAd]['title'].'">';
             echo '</a>';
             echo '<p>';
             echo $ads[$randomAd]['description'];
             echo '</p>';

}
 displayAds728x90();

我没有用$ads->$randomAd->description 定位键，而是用$ads[$randomAd]['description'] 定位它们，它可以工作:)

【讨论】：