¿Cómo obtener el título de la imagen / atributo alt?

Vine aquíporqueestapublicación seencuentraentre losmejores resultadosen elmotor debúsqueda cuando sebuscaeltítulo y laimagen alternativa de WordPress.Alestarbastante sorprendido de queninguna de las respuestasparezcaproporcionar una solución simple que coincida coneltítulo de lapregunta,dejaré caer lo que seme ocurrió alfinal con laesperanza de que ayude a losfuturos lectores.

 // An attachment/image ID is all that's needed to retrieve its alt and title attributes.
$image_id = get_post_thumbnail_id();

$image_alt = get_post_meta($image_id, '_wp_attachment_image_alt', TRUE);

$image_title = get_the_title($image_id);
 

Comobeneficio adicional,aquí seexplica cómo recuperar unaimagen src.Con los atributos anteriores,esoestodo lo quenecesitamospara crearelmarcado de unaimagenestática.

 $size = 'my-size' // Defaults to 'thumbnail' if omitted.

$image_src = wp_get_attachment_image_src($image_id, $size)[0];
 

Came here as this post is among the top hits on the search engine when looking for WordPress image alt and title. Being rather surprised that none of the answers seem to provide a simple solution matching the question's title I'll drop what I came up with in the end hoping it helps future readers.

// An attachment/image ID is all that's needed to retrieve its alt and title attributes.
$image_id = get_post_thumbnail_id();

$image_alt = get_post_meta($image_id, '_wp_attachment_image_alt', TRUE);

$image_title = get_the_title($image_id);

As a bonus here's how to retrieve an image src. With the above attributes that's all we need to build a static image's markup.

$size = 'my-size' // Defaults to 'thumbnail' if omitted.

$image_src = wp_get_attachment_image_src($image_id, $size)[0];

Suproblemaes quenoestáproporcionandoel ID de archivo adjunto correctopara lasfunciones get_post_meta() y get_the_title().

Estees su códigopara obtenerel alt de laimagen:

 $image_alt = get_post_meta( $attachment->ID, '_wp_attachment_image_alt', true);
 

Yes correcto,pero $attachment->IDnoestá definidoen su código,por lo que lafunciónno devuelvenada.

Al leer su código,parece que almacenael ID de laimagen como unmetacampo y luego lo obtiene coneste código:

 $image = get_post_meta(get_the_ID(), WPGRADE_PREFIX.'homepage_slide_image', true);
 

Por lotanto,asumiendo que $image->ides correctoen su código,debe reemplazaresto:

 $image_alt = get_post_meta( $attachment->ID, '_wp_attachment_image_alt', true);
 

Con:

 $image_alt = get_post_meta( $image->id, '_wp_attachment_image_alt', true);
 

Esoespara obtenerel alt,para obtenereltítulo:

  $image_title = get_the_title( $image->id );
 

Your problem is that you are not providing the correct attachment's ID to get_post_meta() and get_the_title() functions.

This is your code to get the alt of the image:

$image_alt = get_post_meta( $attachment->ID, '_wp_attachment_image_alt', true);

And it is correct, but $attachment->ID is not defined in your code, so, the function does not return anything.

Reading your code, it seems that you store the ID of the image as a meta field and then you get it with this code:

$image = get_post_meta(get_the_ID(), WPGRADE_PREFIX.'homepage_slide_image', true);

So, assuming that $image->id is correct in your code, you should replace this:

$image_alt = get_post_meta( $attachment->ID, '_wp_attachment_image_alt', true);

With:

$image_alt = get_post_meta( $image->id, '_wp_attachment_image_alt', true);

That is for getting the alt, to get the title:

 $image_title = get_the_title( $image->id );

Utilizo unafunción rápidaen todosmistemaspara obtener datos de archivos adjuntos deimágenes:

 //get attachment meta
if ( !function_exists('wp_get_attachment') ) {
    function wp_get_attachment( $attachment_id )
    {
        $attachment = get_post( $attachment_id );
        return array(
            'alt' => get_post_meta( $attachment->ID, '_wp_attachment_image_alt', true ),
            'caption' => $attachment->post_excerpt,
            'description' => $attachment->post_content,
            'href' => get_permalink( $attachment->ID ),
            'src' => $attachment->guid,
            'title' => $attachment->post_title
        );
    }
}
 

¡Espero queestote ayude!

I use a quick function in all my themes to get image attachment data:

//get attachment meta
if ( !function_exists('wp_get_attachment') ) {
    function wp_get_attachment( $attachment_id )
    {
        $attachment = get_post( $attachment_id );
        return array(
            'alt' => get_post_meta( $attachment->ID, '_wp_attachment_image_alt', true ),
            'caption' => $attachment->post_excerpt,
            'description' => $attachment->post_content,
            'href' => get_permalink( $attachment->ID ),
            'src' => $attachment->guid,
            'title' => $attachment->post_title
        );
    }
}

Hope this helps!

 $image = get_post_meta(get_the_ID(), WPGRADE_PREFIX . 'homepage_slide_image', true);
if (!empty($image)) {
    $image          = json_decode($image);
    $image_id       = $image->id;
    $img_meta       = wp_prepare_attachment_for_js($image_id);
    $image_title    = $img_meta['title'] == '' ? esc_html_e('Missing title','{domain}') : $img_meta['title'];
    $image_alt      = $img_meta['alt'] == '' ? $image_title : $img_meta['alt'];
    $image_src      = wp_get_attachment_image_src($image_id, 'blog-huge', false);

    echo '<img class="homepage-slider_image" src="' . $image_src[0] . '" alt="' . $image_alt . '" />';

}
 

tengaen cuenta quenoprobé su $image->id,solo asumí quetiene el ID de archivo adjunto correcto.El restoproviene de $img_meta.Sifalta alt,estamos usandoeltítulo de laimagen,sifaltaeltítulo,veráeltexto "Faltaeltítulo"paraindicarle que lo complete.

$image = get_post_meta(get_the_ID(), WPGRADE_PREFIX . 'homepage_slide_image', true);
if (!empty($image)) {
    $image          = json_decode($image);
    $image_id       = $image->id;
    $img_meta       = wp_prepare_attachment_for_js($image_id);
    $image_title    = $img_meta['title'] == '' ? esc_html_e('Missing title','{domain}') : $img_meta['title'];
    $image_alt      = $img_meta['alt'] == '' ? $image_title : $img_meta['alt'];
    $image_src      = wp_get_attachment_image_src($image_id, 'blog-huge', false);

    echo '<img class="homepage-slider_image" src="' . $image_src[0] . '" alt="' . $image_alt . '" />';

}

please note that I did not test your $image->id , just assumed that you have the right attachment ID. The rest comes from $img_meta. If alt is missing we are using image title, if title is missing you will see "Missing title" text to nudge you to fill it in.

Ok,encontré la respuesta quenadietiene en la red que heestadobuscando durante días. Manteneren elmío,esto solofunciona si sutema o complementoestá usando WP_Customize_Image_Control () siestá usando WP_Customize_Media_Control (),get_theme_mod () devolveráel ID yno la url.

Parami solución,estaba usando la versiónmás reciente WP_Customize_Image_Control ()

Muchaspublicacionesen losforostienen get_attachment_id () que yanofunciona. Usé attach_url_to_postid ()

Asíes comopude hacerlo. Espero queesto ayude a alguien

 // This is getting the image / url
$feature1 = get_theme_mod('feature_image_1');

// This is getting the post id
$feature1_id = attachment_url_to_postid($feature1);

// This is getting the alt text from the image that is set in the media area
$image1_alt = get_post_meta( $feature1_id, '_wp_attachment_image_alt', true );
 

Marcado

 <a href="<?php echo $feature1_url; ?>"><img class="img-responsive center-block" src="<?php echo $feature1; ?>" alt="<?php echo $image1_alt; ?>"></a>
 

Ok I found the answer that no one has on the net I been looking for days now. Keep in mine this only works if your theme or plugin is using the WP_Customize_Image_Control() if you are using WP_Customize_Media_Control() the get_theme_mod() will return the ID and not the url.

For my solution I was using the newer version WP_Customize_Image_Control()

A lot of posts on the forums have the get_attachment_id() which does not work anymore. I used attachment_url_to_postid()

Here is how I was able to do it. Hope this helps someone out there

// This is getting the image / url
$feature1 = get_theme_mod('feature_image_1');

// This is getting the post id
$feature1_id = attachment_url_to_postid($feature1);

// This is getting the alt text from the image that is set in the media area
$image1_alt = get_post_meta( $feature1_id, '_wp_attachment_image_alt', true );

Markup

<a href="<?php echo $feature1_url; ?>"><img class="img-responsive center-block" src="<?php echo $feature1; ?>" alt="<?php echo $image1_alt; ?>"></a>