Como obter o título da imagem / atributo alt?

veio aqui comoestepostestáentre osmelhores hitsnomecanismo debusca aoprocurar aimagem do WordPress alte título.Estarbastante surpreso quenenhuma das respostasparecemfornecer uma solução simples correspondente aotítulo dapergunta Eu vou cair o queeuinventeinofinalesperando que ajude osfuturos leitores.

 // 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);
 

Como umbônus aqui é como recuperar umaimagem SRC.Com os atributos acima,tudo o queprecisamospara construir umamarcação deimagemestática.

 $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];

Seuproblema é que vocênãoestáfornecendo o ID do anexo corretopara get_post_meta()e get_the_title()funções.

Este é o seu códigopara obter o alt daimagem:

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

e está correto,mas $attachment->IDnãoestá definidono seu código,portanto,afunçãonão retornanada.

Lendo seu código,parece que você armazena o ID daimagem como um campo demetae,em seguida,obtê-lo comeste código:

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

Então,assumindo que $image->idestá corretoem seu código,você deve substituiristo:

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

com:

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

Isso épara obter o alt,para obter otítulo:

  $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 );

Eu uso umafunção rápidaem todos osmeustemaspara obter dados de anexos deimagem:

 //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 queisso ajude!

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 . '" />';

}
 

Porfavor,note quenãotestei seu $image->id,apenas assumido que vocêtem o ID do anexo correto.O resto vem de $img_meta.Se a ALTestiverfaltando,estamos usando otítulo daimagem,se otítuloestiverfaltando,você verá otexto "Missing Title"para cutucar vocêparapreenchê-lo.

$image = get_post_meta(get_the_ID(), WPGRADE_PREFIX . 'homepage_slide_image', true);
if (!empty($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,encontrei a resposta queninguémtem na rede queestiveprocurando dias agora. Mantenha-senomeu,isso sófunciona se o seutema oupluginestiver usando o WP_Customize_Image_Control () seestiver usando WP_Customize_Media_Control () oget_theme_mod () retornará o IDe não o URL.

paraminha soluçãoeuestava usando a versãomais recente wp_customize_image_control ()

Muitaspostagensnosfórunstêm oget_attachment_id () quenãofuncionamais. Eu usei attachment_url_to_postid ()

Aquiestá comoeufui capaz defazerisso. Espero queisso ajude alguém láfora

 // 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>
 

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>