How to get gravatar in wordpress post using php? - php

Question

I know the get_avatar() function but its not working. Maybe its due to the complexity of the loops? Please take a look at the code below and let me know! Thanks!
function displaymeta(){
global $post;
$m_meta_description = get_post_meta($post->ID, 'my_meta_box_check',
true);
global $wpdb;
$user_nicenames = $wpdb->get_results("SELECT id,user_nicename FROM
{$wpdb->prefix}users", ARRAY_N);
foreach($user_nicenames as $nice_name)
{
foreach($nice_name as $name)
{
foreach($m_meta_description as $val)
{
$flag=strcmp($name,$val);
if($flag==0)
{
echo"<li>";
echo $name. "<br>";
echo get_avatar($name->ID,50);
echo"</li>";
}
}
}
}
}
add_filter( 'the_content', 'displaymeta' );
I've tried $name,$nice_name, $user_nicenames in function get_avatar($val->ID,50); but nothing seems to work! What am I missing here?

Answer 1

You've already used the right function, which is get_avatar().
But the problem is that the $name as in get_avatar($name->ID,50) is not an object. Instead, it's a string, which could be the user ID or display name (i.e. the user_nicename column in the WordPress users table).
So try replacing the foreach in your displaymeta() function with the one below, where I assigned $name to $nice_name[1], and the user ID is assigned to $user_id:
foreach($user_nicenames as $nice_name)
{
$user_id = $nice_name[0];
$name = $nice_name[1];
foreach($m_meta_description as $val)
{
$flag=strcmp($name,$val);
if($flag==0)
{
echo"<li>";
echo $name. "<br>";
echo get_avatar($user_id,50);
echo"</li>";
}
}
}
Additional Note
If you remove the , ARRAY_N as in: (but you don't have to remove it. These are just extra info..)
$user_nicenames = $wpdb->get_results("SELECT id,user_nicename FROM
{$wpdb->prefix}users", ARRAY_N);
then the variable $nice_name would be an object. Hence you can then access $nice_name->user_nicename like this:
$user_id = $nice_name->id;
$name = $nice_name->user_nicename;
UPDATE
In reply to your comment on the missing content, it's because you didn't capture the variable that WordPress passes through the the_content filter. And you also need to append the LI's to that $content, and finally return the modified content (i.e. $content).
So try this code (which is already utilizing the new foreach code as I provided before or above):
function displaymeta( $content ){
global $post;
$m_meta_description = get_post_meta($post->ID, 'my_meta_box_check',
true);
global $wpdb;
$user_nicenames = $wpdb->get_results("SELECT id,user_nicename FROM
{$wpdb->prefix}users", ARRAY_N);
// Add the opening UL tag. Remove if not needed.
$content .= '<ul>';
foreach($user_nicenames as $nice_name)
{
$user_id = $nice_name[0];
$name = $nice_name[1];
foreach($m_meta_description as $val)
{
$flag=strcmp($name,$val);
if($flag==0)
{
$content .= "<li>";
$content .= $name. "<br>";
$content .= get_avatar($user_id,50);
$content .= "</li>";
}
}
}
// Add the closing UL tag. Remove if not needed.
$content .= '</ul>';
return $content;
}
add_filter( 'the_content', 'displaymeta' );
Hope that helps! =)