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I have decoration image in my website. They don't have an alt attribute value because I don't want that the screen reader are disturbing by decoration images. But wordpress put just the word alt without the proper syntax. I need to replace the alt word by alt="".

I tried that filter, but it doesn't change anything in my source code.

add_filter('wp_get_attachment_image_attributes', function($attr) {
    if (!isset($attr['alt']) || trim($attr['alt']) === '') {
        $attr['alt'] = '';
    }
    return $attr;
}, 10, 1);

Could you help me to fix it ? Thanks Caroline

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