Defined (1)

The function is defined in the following location(s).

/wp-includes/comment.php  

function wp_get_comment_fields_max_lengths() { 
    global $wpdb; 
 
    $lengths = array( 
        'comment_author' => 245,  
        'comment_author_email' => 100,  
        'comment_author_url' => 200,  
        'comment_content' => 65525,  
 ); 
 
    if ( $wpdb->is_mysql ) { 
        foreach ( $lengths as $column => $length ) { 
            $col_length = $wpdb->get_col_length( $wpdb->comments, $column ); 
            $max_length = 0; 
 
            // No point if we can't get the DB column lengths 
            if ( is_wp_error( $col_length ) ) { 
                break; 
            } 
 
            if ( ! is_array( $col_length ) && (int) $col_length > 0 ) { 
                $max_length = (int) $col_length; 
            } elseif ( is_array( $col_length ) && isset( $col_length['length'] ) && intval( $col_length['length'] ) > 0 ) { 
                $max_length = (int) $col_length['length']; 
 
                if ( ! empty( $col_length['type'] ) && 'byte' === $col_length['type'] ) { 
                    $max_length = $max_length - 10; 
                } 
            } 
 
            if ( $max_length > 0 ) { 
                $lengths[ $column ] = $max_length; 
            } 
        } 
    } 
 
    /** 
     * Filters the lengths for the comment form fields. 
     * 
     * @since 4.5.0 
     * 
     * @param array $lengths Associative array `'field_name' => 'maximum length'`. 
     */ 
    return apply_filters( 'wp_get_comment_fields_max_lengths', $lengths ); 
}