如果图像数组为空，则显示替代图像

时间：2016-09-06 07:10:34

标签： php mysql arrays if-statement

我为每个在我网站上都有个人资料的用户提供了一个图库页面。我希望画廊从数据库中提取图像并在适当的位置使用它们 - 我有这个工作。但是当没有要显示的图像时，我想要显示五个块，其中即将出现的图像＆＃39;占位符。

如果foreach数组为空，我如何调整以下PHP代码来显示占位符？目前，如果数据库中没有图像，则图库空间中不会显示任何图像。

<?php foreach($galleryphotos as $galleryphoto): ?>
        <?php if(!empty($galleryphoto['galleryphoto_file'])){ ?>
        <div class="csmx-gallery-item csmx-isotope-item col-xs-12 col-sm-6 grid-sizer post-324 portfolio type-portfolio status-publish has-post-thumbnail hentry portfolio-category-france" id="gallery-1928">
            <figure>
                <a class="csmx-media " href="<?php echo $SITE_URL; ?>media/gallery-photos/<?php echo htmlentities($galleryphoto['galleryphoto_file'], ENT_QUOTES, 'UTF-8'); ?>" title="Sarah">
                    <img src="<?php echo $SITE_URL; ?>media/gallery-photos/<?php echo htmlentities($galleryphoto['galleryphoto_file'], ENT_QUOTES, 'UTF-8'); ?>" alt="Sarah">
                    <span class="overlay-background"></span>

                        <div class="overlay-caption">
                            <i class="fa fa-picture-o" aria-hidden="true"></i>
                            <!--<h3>Sarah</h3>-->
                            <!--<p>Contrary to popular belief, Lorem Ipsum is not simply random...</p>-->
                        </div>
                </a>
            </figure>
        </div>
        <?php } ?>
        <?php endforeach; ?>

包括Marco提供的IF ELSE声明的代码; 

<?php foreach($galleryphotos as $galleryphoto): ?>
        <?php if(!empty($galleryescortphoto['galleryphoto_file'])){ ?>
        <div class="csmx-gallery-item csmx-isotope-item col-xs-12 col-sm-6 grid-sizer post-324 portfolio type-portfolio status-publish has-post-thumbnail hentry portfolio-category-france" id="gallery-1928">
            <figure>
                <a class="csmx-media " href="<?php echo $SITE_URL; ?>media/gallery-photos/<?php echo htmlentities($galleryphoto['galleryphoto_file'], ENT_QUOTES, 'UTF-8'); ?>" title="Sarah">
                    <img src="<?php echo $SITE_URL; ?>media/gallery-photos/<?php echo htmlentities($galleryphoto['galleryphoto_file'], ENT_QUOTES, 'UTF-8'); ?>" alt="Sarah">
                    <span class="overlay-background"></span>

                        <div class="overlay-caption">
                            <i class="fa fa-picture-o" aria-hidden="true"></i>
                            <!--<h3>Sarah</h3>-->
                            <!--<p>Contrary to popular belief, Lorem Ipsum is not simply random...</p>-->
                        </div>
                </a>
            </figure>
        </div>
        <?php } else { ?>
            <!-- Add your placeholder image -->
            <div class="csmx-gallery-item csmx-isotope-item col-xs-12 col-sm-6 grid-sizer post-324 portfolio type-portfolio status-publish has-post-thumbnail hentry portfolio-category-france" id="gallery-1928">
            <figure>
                <a class="csmx-media " href="" title="Sarah">
                    <img src="<?php echo $SITE_URL; ?>media/gallery-photos/no-photo.png" alt="Sarah">
                    <span class="overlay-background"></span>

                        <div class="overlay-caption">
                            <i class="fa fa-picture-o" aria-hidden="true"></i>
                            <!--<h3>Sarah</h3>-->
                            <!--<p>Contrary to popular belief, Lorem Ipsum is not simply random...</p>-->
                        </div>
                </a>
            </figure>
        </div>
        <?php } ?>
        <?php endforeach; ?>

使用Kiran中的示例更新了代码 - 即使图像值存在，它也不会显示存储的图像，而是显示占位符; 

<?php if(empty($galleryphotos)) $galleryphotos[0]['galleryphoto_file'] = "image-not-available.jpg";
    foreach($galleryphotos as $galleryphoto): ?>
    <div class="csmx-gallery-item csmx-isotope-item col-xs-12 col-sm-6 grid-sizer post-324 portfolio type-portfolio status-publish has-post-thumbnail hentry portfolio-category-france" id="gallery-1928">
        <figure>
            <a class="csmx-media " href="<?php echo $SITE_URL; ?>media/gallery-photos/<?php echo htmlentities($galleryphoto['galleryphoto_file'], ENT_QUOTES, 'UTF-8'); ?>" title="Sarah">
                <img src="<?php echo $SITE_URL; ?>media/gallery-photos/<?php echo htmlentities($galleryphoto['galleryphoto_file'], ENT_QUOTES, 'UTF-8'); ?>" alt="Sarah">
                <span class="overlay-background"></span>

                    <div class="overlay-caption">
                        <i class="fa fa-picture-o" aria-hidden="true"></i>
                        <!--<h3>Sarah</h3>-->
                        <!--<p>Contrary to popular belief, Lorem Ipsum is not simply random...</p>-->
                    </div>
            </a>
        </figure>
    </div>
    <?php endforeach; ?>

2 个答案:

答案 0 :(得分：1)

我认为你想在画廊空的时候展示占位符照片。如果是这样，那么你可能想要这样做：

<?php if(empty($galleryphotos)) $galleryphotos[0]['galleryphoto_file'] = "no-photo.png";
    foreach($galleryphotos as $galleryphoto): ?>
    <div class="csmx-gallery-item csmx-isotope-item col-xs-12 col-sm-6 grid-sizer post-324 portfolio type-portfolio status-publish has-post-thumbnail hentry portfolio-category-france" id="gallery-1928">
        <figure>
            <a class="csmx-media " href="<?php echo $SITE_URL; ?>media/gallery-photos/<?php echo htmlentities($galleryphoto['galleryphoto_file'], ENT_QUOTES, 'UTF-8'); ?>" title="Sarah">
                <img src="<?php echo $SITE_URL; ?>media/gallery-photos/<?php echo htmlentities($galleryphoto['galleryphoto_file'], ENT_QUOTES, 'UTF-8'); ?>" alt="Sarah">
                <span class="overlay-background"></span>

                    <div class="overlay-caption">
                        <i class="fa fa-picture-o" aria-hidden="true"></i>
                        <!--<h3>Sarah</h3>-->
                        <!--<p>Contrary to popular belief, Lorem Ipsum is not simply random...</p>-->
                    </div>
            </a>
        </figure>
    </div>
    <?php endforeach; ?>

上述代码的变化：

  1. 第一行检查$ galleryphotos数组是否为空，如果为真，则为其添加占位符。
  2. 如果条件没有必要删除
  3. 休息代码与应该工作的相同。

    4. 更新＃1：

    问题可能是由于第一个if子句尝试将条件更改为：

    if(count($galleryphotos)==0) $gallerypho...

答案 1 :(得分：0)

试试这个：

<?php foreach($galleryphotos as $galleryphoto): ?>
        <?php if(!empty($galleryphoto['galleryphoto_file'])){ ?>
        <div class="csmx-gallery-item csmx-isotope-item col-xs-12 col-sm-6 grid-sizer post-324 portfolio type-portfolio status-publish has-post-thumbnail hentry portfolio-category-france" id="gallery-1928">
            <figure>
                <a class="csmx-media " href="<?php echo $SITE_URL; ?>media/gallery-photos/<?php echo htmlentities($galleryphoto['galleryphoto_file'], ENT_QUOTES, 'UTF-8'); ?>" title="Sarah">
                    <img src="<?php echo $SITE_URL; ?>media/gallery-photos/<?php echo htmlentities($galleryphoto['galleryphoto_file'], ENT_QUOTES, 'UTF-8'); ?>" alt="Sarah">
                    <span class="overlay-background"></span>

                        <div class="overlay-caption">
                            <i class="fa fa-picture-o" aria-hidden="true"></i>
                            <!--<h3>Sarah</h3>-->
                            <!--<p>Contrary to popular belief, Lorem Ipsum is not simply random...</p>-->
                        </div>
                </a>
            </figure>
        </div>
        <?php } else { ?>
            <!-- Add your placeholder image -->
            <img src="https://pbs.twimg.com/profile_images/762369348300251136/5Obhonwa.jpg" />
        <?php } ?>
        <?php endforeach; ?>
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