Comment obtenir l'attribut titre / alt de l'image?

Je suis venuici car cet articlefaitpartie desmeilleurs résultats sur lemoteur de recherche lors de la recherche de l'altet dutitre d'image WordPress.Étantplutôt surpris qu'aucune des réponsesne semblefournir une solution simple correspondant autitre de la question,je laissetomber ce quej'aiproposé à lafin enespérant que cela aidera lesfuturs lecteurs.

 // 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);
 

Enbonus,voici comment récupérer uneimage src.Avec les attributs ci-dessus,c'esttout ce dontnous avonsbesoinpour créer lebalisage d'uneimage statique.

 $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];

Votreproblèmeest que vousne fournissezpas l'ID correct de lapiècejointe auxfonctions get_post_meta()et get_the_title().

Voici votre codepour obtenir le alt de l'image:

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

Et c'est correct,mais $attachment->IDn'estpas défini dans votre code,donc,lafonctionne renvoie rien.

En lisant votre code,il semble que vous stockiez l'ID de l'image sousforme de champmétaet que vous l'obteniez avec ce code:

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

Donc,en supposant que $image->idest correct dans votre code,vous devriez remplacer ceci:

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

Avec:

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

C'estpour obtenir le alt,pour obtenir letitre:

  $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 );

J'utilise unefonction rapide danstousmesthèmespour obtenir des données depiècejointe d'image:

 //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
        );
    }
}
 

J'espère que cela vous aidera!

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 . '" />';

}
 

Veuilleznoter queje n'aipastesté votre $image->id,je suppose simplement que vous avez lebon ID depiècejointe.Le reste vient de $img_meta.Si altestmanquant,nous utilisons letitre de l'image,si letitreestmanquant,vous verrez letexte "Titremanquant"pour vouspousser à le remplir.

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

Okj'aitrouvé la réponse quepersonnen'a sur lenet queje cherchais depuis desjoursmaintenant. Gardez dans lemien celane fonctionne que si votrethème ouplugin utilise WP_Customize_Image_Control () si vous utilisez WP_Customize_Media_Control () leget_theme_mod () renverra l'IDet non l'URL.

Pourma solution,j'utilisais lanouvelle version WP_Customize_Image_Control ()

Beaucoup demessages sur lesforums ont leget_attachment_id () quine fonctionneplus. J'ai utilisé attachment_url_to_postid ()

Voici commentj'aipu lefaire. J'espère que cela aide quelqu'un là-bas

 // 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 );
 

Balisage

 <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>