images - How to generate alt attributes with phpfilters?

admin管理员组

文章数量:1315832

I would like to generate to generate some kind of automatic alt attributes for the images, if they don't have alt set up.

Found this code, but it doesn't work for some reason:

function add_alt_tags($content)
{
    global $post;
    preg_match_all('/<img (.*?)\/>/', $content, $images);
    if(!is_null($images))
    {
        foreach($images[1] as $index => $value)
        {
            if(!preg_match('/alt=/', $value))
            {
                $new_img = str_replace('<img', '<img alt="'.$post->post_title.'"', $images[0][$index]);
                $content = str_replace($images[0][$index], $new_img, $content);
            }
        }
    }
    return $content;
}
add_filter('the_content', 'add_alt_tags', 99999);

I would like to generate to generate some kind of automatic alt attributes for the images, if they don't have alt set up.

Found this code, but it doesn't work for some reason:

function add_alt_tags($content)
{
    global $post;
    preg_match_all('/<img (.*?)\/>/', $content, $images);
    if(!is_null($images))
    {
        foreach($images[1] as $index => $value)
        {
            if(!preg_match('/alt=/', $value))
            {
                $new_img = str_replace('<img', '<img alt="'.$post->post_title.'"', $images[0][$index]);
                $content = str_replace($images[0][$index], $new_img, $content);
            }
        }
    }
    return $content;
}
add_filter('the_content', 'add_alt_tags', 99999);

• images
• filters
• seo

Share Improve this question asked Nov 16, 2020 at 8:44 RunnickRunnick 1,05933 gold badges1414 silver badges2626 bronze badges

Add a comment  | 

1 Answer 1

Sorted by: Reset to default 0

Maybe not the best solution, but did it like this:

function add_alt_tags($content)
{
    global $post;
    $content = str_replace('alt=""', 'alt="'.$post->post_title .'"',
    $content);
    return $content;
}
add_filter('the_content', 'add_alt_tags', 100);

本文标签： imagesHow to generate alt attributes with phpfilters