我写了一些黑客代码，十次打破了干燥原则，在我正在构建的网站主页上获得了十个滑块图像。我不得不重复这个代码10次，它真的很难看！

<?php if (get_post_meta($post->ID, \'1-carousel-image\')==true): ?>
    <div class="item">
      <?php if (get_post_meta($post->ID, \'1-carousel-title\')==true): ?>
      <div class="display-block">
        <div class="text-block slider">
          <h3 class="slider-title"><?php echo get_post_meta($post->ID, \'1-carousel-title\', true); ?></h3>
          <p><?php echo get_post_meta($post->ID, \'1-carousel-text\', true); ?></p>
          <?php if (get_post_meta($post->ID, \'1-carousel-button-text\')==true): ?>
          <a href="<?php echo get_site_url(); ?><?php echo get_post_meta($post->ID, \'1-carousel-button-link\', true); ?>" class="button primary"><?php echo get_post_meta($post->ID, \'1-carousel-button-text\', true); ?></a>
          <?php else: ?>
          <?php /* Show no button if text is missing */ ?>
          <?php endif; ?>
        </div>
      </div>
      <?php else: ?>
      <?php /* Show no text if text is missing */ ?>
      <?php endif; ?>
      <img class="mobile-hide" src="<?php echo get_post_meta($post->ID, \'1-carousel-image\', true); ?>" alt="<?php echo get_post_meta($post->ID, \'1-carousel-image-alt\', true); ?>">
      <img class="mobile-show" src="<?php echo get_post_meta($post->ID, \'1-carousel-image-mobile\', true); ?>" alt="<?php echo get_post_meta($post->ID, \'1-carousel-image-alt\', true); ?>">
    </div>
    <?php else: ?>
    <?php /* Show nothing if video custom post type is missing */ ?>
    <?php endif; ?>

我知道我需要一个for循环，但无法正确地编写它。如何使用上述代码和自定义帖子类型？

以下是我想要的步骤：

有一个for循环，从1开始，使用变量上升，当图像用完时停止。循环必须检查是否有标题，然后标题栏显示。一旦循环找到第一个图像，然后检查其他数据并添加这些数据（如果可用）。循环重复，直到没有更多图像可用；1-carousel-image然后检查2-carousel-image，依此类推我想创建一个变量，即x-carousel-image、x-carousel-title等，该变量将不断增加1，直到没有更多图像可用为止。如何用php编写？

// This...
if ( get_post_meta( $id, $field ) )
    echo get_post_meta( $id, $field );

// Less function overhead, neater
$value = get_post_meta( $id, $field );
if ( $value )
    echo $value;

// Even neater
if ( $value = get_post_meta( $id, $field ) )
    echo $value;

<?php

for ( $i = 1; $i <= 10; $i++ ) {
    if ( $image = get_post_meta( $post->ID, "{$i}-carousel-image", true ) ) : ?>

        <div class="item">
            <?php if ( $title = get_post_meta( $post->ID, "{$i}-carousel-title", true ) ) : ?>
                <div class="display-block">
                    <div class="text-block slider">
                        <h3 class="slider-title"><?php echo $title ?></h3>
                        <p><?php echo get_post_meta( $post->ID, "{$i}-carousel-text", true ) ?></p>
                        <?php if ( $text = get_post_meta( $post->ID, "{$i}-carousel-button-text", true ) ) : ?>
                            <a href="<?php echo esc_url( site_url( get_post_meta( $post->ID, "{$i}-carousel-button-link", true ) ) ) ?>" class="button primary"><?php echo $text ?></a>
                        <?php endif ?>
                    </div>
                </div>

            <?php endif ?>
            <img class="mobile-hide" src="<?php echo esc_url( $image ) ?>" alt="<?php echo esc_attr( get_post_meta( $post->ID, "{$i}-carousel-image-alt", true ) ) ?>" />
            <img class="mobile-show" src="<?php echo esc_url( get_post_meta( $post->ID, "{$i}-carousel-image-mobile", true ) ) ?>" alt="<?php echo esc_attr( get_post_meta( $post->ID, "{$i}-carousel-image-alt", true ) ) ?>" />
        </div>

    <?php
    endif;
}