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WordPress Example Plugin: Comment meta data test
<?php
/*
Plugin Name: Comment meta data test
Version: 1.0
Plugin URI: http://wpengineer.com
Description: Comment meta data test
Author: Latz
Author URI: http://wpengineer.com
*/
add_filter( 'comment_form_defaults', 'change_comment_form_defaults');
function change_comment_form_defaults($default) {
$commenter = wp_get_current_commenter();
$default['fields']['email'] .= '<p class="comment-form-author">' .
'<label for="city">'. __('City') . '</label>
<span class="required">*</span>
<input id="city" name="city" size="30" type="text" /></p>';
return $default;
}
add_filter( 'preprocess_comment', 'verify_comment_meta_data' );
function verify_comment_meta_data($commentdata) {
if ( ! isset( $_POST['city'] ) )
wp_die( __('Error: please fill the required field (city).') );
return $commentdata;
}
add_action( 'comment_post', 'save_comment_meta_data' );
function save_comment_meta_data( $comment_id ) {
add_comment_meta( $comment_id, 'city', $_POST['city'] );
}
add_filter( 'get_comment_author_link', 'attach_city_to_author' );
function attach_city_to_author( $author ) {
$city = get_comment_meta( get_comment_ID(), 'city', true );
if ( $city )
$author .= " ($city)";
return $author;
}
?>
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