Get comment content by comment ID

Question

So I've been trying for a hour or so now to list comment by it's ID. I've tried the get_comment($id, $output) function but it didn't work well, so I went back to whatever is shown below, but it just shows all comments. I want it to show just one comment by it's ID. I can't figure out a way to do it. What am I doing wrong?

$args = array(
    'id' => 1,
);

// The Query
$comments_query = new WP_Comment_Query;
$comments = $comments_query->query( $args );

// Comment Loop
if ( $comments ) {
    foreach ( $comments as $comment ) {
        echo '<p>'.$comment->comment_content.'</p>';
    }
}

Answer 1

The Codex makes it seem like you can query for a specific comment by ID, as does the GenerateWP query generator, but I couldn't get it to work with either of those examples. Even looking through the WP_Comment_Query:query() code makes it clear that you should be able to pass the ID in the parameters.

That said, using get_comment() is your only way to go for now. Here's what can work based on your original code:

<?php
/**
 * Get the contents of a single comment by its ID.
 * 
 * @param  int $comment_id The ID of the comment to retrieve.
 * 
 * @return string The comment as a string, if present; null if no comment exists.
 */
function wpse120039_get_comment_by_id( $comment_id ) {
    $comment = get_comment( intval( $comment_id ) );

    if ( ! empty( $comment ) ) {
        return $comment->comment_content;
    } else {
        return '';
    }
}

echo '<p>' . wpse120039_get_comment_by_id( '34' ) . '</p>';

Answer 2

I don't see an argument to WP_Comment_Query that would let you search comments by comment ID, just by the associated post ID. However, get_comment will do it. An example from the Codex:

$my_id = 7;
$comment_id_7 = get_comment( $my_id ); 
$name = $comment_id_7->comment_author;