Explain the PHP functions used to obtain comment templates and search forms in WordPress

comments_template() (get comment template)

comments_template() function is used to get the comment template. Generally it can only be used on articles or pages. If it is not an article or page, it will not be displayed.
Usage

comments_template( $file, $separate_comments );

Parameters

$file

(String) (optional) Template file to comment.

Default value: /comments.php (comments.php file in the root directory of the current theme).

$separate_comments

(boolean) (optional) Whether to separate comments based on their type.

Default value: False

Return value

This function has no return value.

Example

Introduce the comments.php file in the root directory of the current theme by default.

<&#63;php comments_template(); &#63;>

Introduce custom files:

<&#63;php comments_template( '/short-comments.php' ); &#63;>

Others

This function is located at: wp-includes/comment-template.php

get_search_form() (get search form)
get_search_form() function is used to get Search form, the code of the search form is located in the searchform.php file in the root directory of the current theme.

Usage

get_search_form( $echo );

Parameters

$echo

(Boolean) (optional) If true, the search form will be printed directly, if not true, the code of the search form will be returned.

Default value: True

Return value

(string) If the $echo parameter is False, return the Html code of the search form.

Example

If there is no searchform.php file in the theme root directory, it will default to the form code below:

<form role="search" method="get" action="<&#63;php esc_url( home_url( '/' )); &#63;>">
  <div>
    <label for="s"><&#63;php _x( 'Search for:', 'label' ); &#63;></label>
    <input type="text" value="<&#63;php get_search_query(); &#63;>" name="s" />
    <input type="submit" value="<&#63;php esc_attr_x( 'Search', 'submit button' ); &#63;>" />
  </div>
</form>

Others

This function is located at: wp-includes/general-template.php

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