WordPress Add Alt Text to Uploaded Images Automatically – WordPress Tutorial

By | May 17, 2021

We can upload images to wordpress using php code. However, how to add alt text for these images? In this tutorial, we will introduce you how to do.

WordPress Add Alt Text to Uploaded Images Automatically - WordPress Tutorial

Image is a type of post in wordpress

All images uploaded are saved in wp_posts table in wordpress, which means image is regarded as a type of wordpress post. We can use wordpress post functions to operate images.

Where image alt text is saved?

Image alt text is a meta data of an image post, it is saved in wp_postmeta table. Here is an example:

wordpress image alt text in wp_postmeta table

How to add alt text for images in wordpress?

As mentioned above, we can add or update image post meta data ‘_wp_attachment_image_alt‘.

Here is an example:

update_post_meta($attach_id, '_wp_attachment_image_alt', $alt);

Here

$attach_id: it is the image post id.

$alt: the content of image alt text.

If _wp_attachment_image_alt meta data does not exist, it will be created. Otherwise, it will be updated.

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