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

Gets the URL of an image attachment.

Contents

Parameters

$attachment_id int Required
Image attachment ID.
$size string|int[] Optional
Image size. Accepts any registered image size name, or an array of width and height values in pixels (in that order). Default 'thumbnail'.

Default: 'thumbnail'

$icon bool Optional
Whether the image should be treated as an icon.

Default: false

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Return

string|false Attachment URL or false if no image is available. If $size does not match any registered image size, the original image URL will be returned.

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Source

File: wp-includes/media.php. View all references 

function wp_get_attachment_image_url( $attachment_id, $size = 'thumbnail', $icon = false ) {
	$image = wp_get_attachment_image_src( $attachment_id, $size, $icon );
	return isset( $image[0] ) ? $image[0] : false;
}

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Changelog

Changelog
Version Description
4.4.0 Introduced.

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User Contributed Notes

  1. Skip to note 1 content
    You must log in to vote on the helpfulness of this noteVote results for this note: 4You must log in to vote on the helpfulness of this note
    Contributed by maidot —

    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 2 content
    You must log in to vote on the helpfulness of this noteVote results for this note: 1You must log in to vote on the helpfulness of this note
    Contributed by Rinku Y — 
    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 3 content
    You must log in to vote on the helpfulness of this noteVote results for this note: 1You must log in to vote on the helpfulness of this note
    Contributed by David Elstob — 
    <?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.

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