wp_get_attachment_image_url( int $attachment_id, string|int[] $size = 'thumbnail', bool $icon = false ): string|false

User Contributed Notes

1. Skip to note 4 content

   maidot 3 years ago

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   For whoever, like me, is looking for the standard sizes, here they are:

   thumbnail = Thumbnail (default 150px x 150px max)
   medium = Medium resolution (default 300px x 300px max)
   large = Large resolution (default 1024px x 1024px max)
   full = Full resolution (original size uploaded)
2. Skip to note 5 content

   Rinku Y 9 years ago

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   add_theme_support( 'post-thumbnails' );
   add_image_size( 'home-slide-img-mobile', 640, 1072, true ); //resize, crop in functions.php

   Now let display somewhere:

   $imgid = 6; //need to get it dynamically
   $imgurldesktop = wp_get_attachment_image_url( $imgid, '' ); //use default image size
   $imgurlmobile = wp_get_attachment_image_url( $imgid, 'home-slide-img-mobile' ); //use custom set size
3. Skip to note 6 content

   David Elstob 5 years ago

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   <?php $attachment_image = wp_get_attachment_url( get_post_thumbnail_id() ); ?>
   <link rel="preload" as="image" href="<?php echo esc_url( $attachment_image ); ?>">

   Add this snippet to the head section in header.php to preload the attachment image on every page/post.

   • Recommend performing a check that the current page/post has a post thumbnail before adding the preload directive.

     crstauf 5 years ago