Add image alt to WP Post Thumbnails - php

Question

I am trying to add the alt attribute to post thumbnails on my blog.
I get the alt text to echo, but not as an attribute, but as text!
<?php if ( has_post_thumbnail() ) {$image_src = wp_get_attachment_image_src( get_post_thumbnail_id(),’thumbnail’ ); $image_alt = wpseoFocusKW();
echo '<img width="100%" src="' . $image_src[0] . '" alt=' . $image_alt .' >';} ?></div></div>
You can see the issue here: http://benefacto.org/three-days-paid-volunteering-leave-an-update-from-rob-wilsons-office/
You will note I'm using the Yoast Keyword as the alt, which works fine.
Any thoughts much appreciated.
Ben

Answer 1

Try the following (only PHP part):
<?php
if (has_post_thumbnail()) {
$image_src = wp_get_attachment_image_src(get_post_thumbnail_id(),'thumbnail');
$image_alt = wpseo_get_value('focuskw', $post->ID);
echo '<img width="100%" src="'.$image_src[0].'" alt="'.$image_alt.'">';
}
?>
The content of the function wpseoFocusKW() looks like this:
function wpseoFocusKW()
{
$focuskw = wpseo_get_value('focuskw', $post->ID);
echo $focuskw;
}
This function only echo the keyword, but don't return!
Reference: http://snipplr.com/view/67931/
You can create a custom function or change the original like this:
function wpCustomSeoFocusKW($return = false)
{
$focuskw = wpseo_get_value('focuskw', $post->ID);
if ($return) {
return $focuskw;
} else {
echo $focuskw;
}
}