Tutorial on Adding Background Text to WordPress Comment Box

Because I recently switched toHummingbird Plugin for cachingWordPress Posts, and Hummingbird's cache update mechanism is somewhat unscientific—updating the cache requires clearing everything and regenerating it. When someone comments, if the page is not set to update the cache, the comment won't be displayed, so I researched adding prompt text to the WordPress comment box.The effect is as follows:   Implementation method:There are two methods found online for adding background prompt text to the WordPress comment box. Most articles use Method 1, but in recent years, especially now, Theme files are generally not written that way anymore, so most are implemented via Method 2. It depends on how your Theme is implemented.

Method 1

If in your Theme's comments.php file you can directly find code similar to the following string

Then you can add it directly within this string of code.

我坚信，评论可以一针见血！

Method 2

If you cannot see the above string of code <?php comment_form(); ?></pre>Then replace the above code with the following string of code to achieve the effect.<pre> <?php comment_form( array( 'comment_field' => '<textarea id="comment" name="comment" cols="45" rows="8" maxlength="65525" required="required" placeholder="评论需审核，评论有缓存…">', ) ); ?>For the string cols="45" rows="8" maxlength="65525", you can check what your Theme"s default Frontend displays and replace it with the Theme"s code. Default comment area code

$fields =  array(

  'author' =>
    '
' . __( 'Name', 'domainreference' ) .
    ( $req ? '*' : '' ) . '' .
    '
',

  'email' =>
    '
' . __( 'Email', 'domainreference' ) .
    ( $req ? '*' : '' ) . '' .
    '
',

  'url' =>
    '
' . __( 'Website', 'domainreference' ) . '' .
    '
',
);

Starting from 4.9.6, if „Show comments cookies opt-in checkbox“ is checked in „Discussion Settings“, a cookie consent checkbox will be added to the area.

$fields['cookies'] =  '
' . '' . __( 'Save my name, email, and website in this browser for the next time I comment.' ) . '
';

Note: To use the variables from the above code in a custom callback function, you must first set these variables in the callback using the following:

$commenter = wp_get_current_commenter();
$req = get_option( 'require_name_email' );
$aria_req = ( $req ? " aria-required='true'" : '' );

$consent = empty( $commenter['comment_author_email'] ) ? '' : ' checked="checked"';

This article references the following articles:Adding Guidance Instructions to WordPress Comment Box Custom Comment Form comment_form() WordPress Official Documentation Function Reference/comment form