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Alt property is empty in WordPress – SEO

My code

<?php echo the_post_thumbnail( 'thumbnail' ); ?>

Returns : Like this 

<img width="650" height="366" src="https://test.com/wp-content/uploads/2019/02/5c1c7adb0c92110fd79f66aa_1545370331112-650x366.jpg" class="attachment-thumbnail size-thumbnail wp-post-image" alt="" srcset="https://test.com/wp-content/uploads/2019/02/5c1c7adb0c92110fd79f66aa_1545370331112-650x366.jpg 650w, https://test.com/wp-content/uploads/2019/02/5c1c7adb0c92110fd79f66aa_1545370331112-300x169.jpg 300w, https://test.com/wp-content/uploads/2019/02/5c1c7adb0c92110fd79f66aa_1545370331112-768x432.jpg 768w, https://test.com/wp-content/uploads/2019/02/5c1c7adb0c92110fd79f66aa_1545370331112-1024x576.jpg 1024w, https://test.com/wp-content/uploads/2019/02/5c1c7adb0c92110fd79f66aa_1545370331112-255x143.jpg 255w, https://test.com/wp-content/uploads/2019/02/5c1c7adb0c92110fd79f66aa_1545370331112-1110x623.jpg 1110w, https://test.com/wp-content/uploads/2019/02/5c1c7adb0c92110fd79f66aa_1545370331112.jpg 1500w" sizes="(max-width: 650px) 100vw, 650px">

Here the altproperty value is empty.

But i need something to be filled for the alt property to fix the SEO bug.

Thanks in advance.

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2

Answers


  1. Chosen as BEST ANSWER
    0

    As Default the wordpress is getting uploaded image alternative(alt) content from the "Media" module.

    Example, enter image description here

    If the image source contains the alt content then the "the_post_thumbnail( 'thumbnail' )" will return the alt text in DOM.


  2. 0

    Add following code in your active themes functions.php

    add_filter('wp_get_attachment_image_attributes', 'change_attachement_image_attributes_add_alttopost', 20, 2);

function change_attachement_image_attributes_add_alttopost( $attr, $attachment ){
    // Get post parent
    $parent = get_post_field( 'post_parent', $attachment);

    // Get post type to check if it's post you can also add to any post type
    $type = get_post_field( 'post_type', $parent);
    if( $type != 'post' ){
        return $attr;
    }

    /// Get title
    $title = get_post_field( 'post_title', $parent);

    $attr['alt'] = $title;
    $attr['title'] = $title;

    return $attr;
}
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