下面，我希望$slideNumber由幻灯片的数量决定。我尝试在幻灯片部分创建一个变量，并让每张新幻灯片增加 1。然后我尝试将其插入：
<input type="radio" name="slider" id="slide<?php echo $slideNumber; ?>">
但是没有任何输出。它只是输出id的单词slide。我该怎么做才能解决这个问题？
澄清一下，如果有五张幻灯片，应该有五张inputs打印，如下所示：
<input type="radio" name="slider" id="slide1">
<input type="radio" name="slider" id="slide2">
<input type="radio" name="slider" id="slide3">
<input type="radio" name="slider" id="slide4">
<input type="radio" name="slider" id="slide5">
我该怎么做才能解决这个问题？
<!-- Slider Setup -->
<?php if( have_rows('slides') ):
while ( have_rows('slides') ) : the_row();
?>
<input type="radio" name="slider" id="slide<?php echo $slideNumber; ?>">
<?php endwhile;endif; ?>
<!-- Slide -->
<?php if( have_rows('slides') ): ?>
<div id="slides">
<div id="overflow">
<div class="inner">
<?php if( have_rows('slides') ):
$slideNumber = 1;
while ( have_rows('slides') ) : the_row();
$slideNumber++;
$slideImage = get_sub_field('slide_image');
?>
<article>
<img src="<?php echo $slideImage; ?>" alt="<?php the_title(); ?>">
</article>
<?php endwhile;endif; ?>
</div><!-- #inner -->
</div><!-- #overflow -->
</div><!-- #slides -->
<?php endif; ?>
似乎您正在尝试使用$slideNumber变量，而它甚至没有定义，在这里：
<!-- Slider Setup -->
<?php if( have_rows('slides') ):
while ( have_rows('slides') ) : the_row();
?>
<input type="radio" name="slider" id="slide<?php echo $slideNumber; ?>">
<!-- You're using $slideNumber here - but it's not defined or incremented -->
<?php endwhile;endif; ?>
相反，您可以在此处定义并递增此属性：
<?php if( have_rows('slides') ):
$slideNumber = 1; // you define it here
while ( have_rows('slides') ) : the_row();
$slideNumber++; // you increment it for every slide
$slideImage = get_sub_field('slide_image');
?>
<article> <!-- but you actually don't use it -->
<img src="<?php echo $slideImage; ?>" alt="<?php the_title(); ?>">
</article>
<?php endwhile;endif; ?>
请尝试以下代码：
<!-- Slider Setup -->
<?php if( have_rows('slides') ):
$slideNumber = 1; // defined
while ( have_rows('slides') ) : the_row();
?>
<!-- Has to output something for id attribute, at least "slide1" -->
<input type="radio" name="slider" id="slide<?php echo $slideNumber; ?>">
<?php
$slideNumber++; // incremented
endwhile;
endif;
?>
<!-- Slide -->
<?php if( have_rows('slides') ): ?>
<div id="slides">
<div id="overflow">
<div class="inner">
<?php if( have_rows('slides') ):
while ( have_rows('slides') ) : the_row();
$slideImage = get_sub_field('slide_image');
?>
<article>
<img src="<?php echo $slideImage; ?>" alt="<?php the_title(); ?>">
</article>
<?php endwhile;endif; ?>
</div><!-- #inner -->
</div><!-- #overflow -->
</div><!-- #slides -->
<?php endif; ?>