I'm just starting to create new theme and i'm new to code. I'm stuck in customizing the post thumbnail code, i tried add

<?php previous_post_link(get_the_post_thumbnail(get_previous_post(), array(
                        'class' =>  'rounded-lg object-cover'
           )) . '<h4 class="text-center">%link</h4>',
           '%title',false
   );
?>

but it doesn't seem to work. did my array mistakenly placed in the code?

I'm just starting to create new theme and i'm new to code. I'm stuck in customizing the post thumbnail code, i tried add

<?php previous_post_link(get_the_post_thumbnail(get_previous_post(), array(
                        'class' =>  'rounded-lg object-cover'
           )) . '<h4 class="text-center">%link</h4>',
           '%title',false
   );
?>

but it doesn't seem to work. did my array mistakenly placed in the code?

• css
• post-thumbnails
• array
• post-class

• wordpress.stackexchange/questions/102158/… – fja3omega Commented Jul 16, 2019 at 0:51
• Are you saying it's not working because you can't see the CSS effect you expected to see, or are you saying it's not working because the class attribute does not have those classes when you inspect the HTML? – Jacob Peattie Commented Jul 16, 2019 at 1:06
• 2 2nd argument is thumbnail size (usually 'post-thumbnail') so if you add that the attributes will shift to their correct (3rd) argument position and should be all good. developer.wordpress/reference/functions/… – majick Commented Jul 16, 2019 at 1:12
• guys sorry, i think i already fix it, and now i have problem with customizing image width and height, here are my latest code. – haiz85 Commented Jul 16, 2019 at 1:32

2 Answers 2

Sorry for late reply, already fixed, i miss understood about array, so here the code that completely run as i want it.

 <?php
 $next_post = get_next_post();
  next_post_link('%link',
     get_the_post_thumbnail($next_post->ID, 'prev_next_img', array(
               'class' => 'rounded-lg object-fill w-full max-h-full' 
     )) . '<h4 class="text-center mt-2 lg:text-base text-sm no-underline text-black leading-snug font-medium">%title</h4>',                                                
     false);
 ?>

in function.php

i put custome image size

add_image_size('prev_next_img', 370, 270, true);

i think i already fix it, and now i have problem with customizing image width and height, here are my latest code.

 $prev_post = get_previous_post();
 previous_post_link(
 get_the_post_thumbnail($prev_post->ID, 'custom-size-image', array(
         'class'     =>  'rounded-lg object-cover',
         'sizes'     =>  'width="371" height="270"'
 )) . '<h4 class="text-center">%link</h4>',
 '%title',
 false
 );

but 'sizes' part doesn't seem to work, please help