WordPress 自定义页面模板

A. 函数 get_template_part（） ：

假设您在主题的index.php文件中想要加载content.php，您可以这样做：

/* Environment: We're in index.php */

if ( have_posts() ) :

while ( have_posts() ) : the_post();

get_template_part( 'content' );

endwhile;

endif;

除了基本的使用方法之外，get_template_part函数还有一些常见的用法：

get_template_part( 'content', 'single' );

  <?=get_template_part('modules/trusty-part') ?>
  <?=get_template_part('partials/common/js2') ?>
  <?=get_template_part( 'template-parts/content', get_post_format() ); ?>

B. 理解和创建短代码：


/*
注册 [wpkt] 短代码
在主题的 functions.php 中添加如下代码
作用是将正文中的 [wpkt] 替换成 <h2>WordPress课堂， www.wordpressKT.com</h2>
*/

function wpkt_shortcode_handler($atts = array(), $content = null, $tag = '') {
  $content = '<h2>WordPress课堂， www.wordpressKT.com</h2>';
  return $content;
}

function wpkt_shortcode_register() {
  // 短代码
  add_shortcode('wpkt', 'wpkt_shortcode_handler');
}

add_action('init', 'wpkt_shortcode_register');

```

- index.php 使用短代码
```php
<head>
<?php wp_head();?>
</head>
<body>

<?php
if (have_posts()) {
  while(have_posts()) {
    the_post();

    // 将正文中的 [wpkt] 替换成 <h2>WordPress课堂， www.wordpressKT.com</h2>
    the_content();

    // 如果直接获取，会直接返回 [wpkt] 不会进行替换
    echo get_the_content();

    // 执行替换
    echo do_shortcode('[wpkt]');
  }
}
?>

<?php wp_footer();?>
</body>
```

Custom Woocommerce products list shortcode：（自选商品组-短代码）

function custom_product_list_shortcode( $atts, $content = null ) {

    $_atts =  shortcode_atts( [
        'ids' => '',
    ], $atts );

    $ids_arr = array_filter( array_map( function( $id ){
        return trim( $id );
    }, explode( ',', $_atts['ids'] ) ) );

    $products = wc_get_products( [
        'post_status' => 'publish',
        // can't remember if it's 'orderby' or 'order_by''order_by' => [
            'title' => 'ASC',
            'post_date' => 'DESC',
        ],
        'posts_per_page' => -1,
        // you can probably just pass in the comma sep string instead of array but maybe not.
        // you need to check that post__in is correct. look at the docs for WP_Query, or WC_Query, or wc_get_products()
        'post__in' => $ids_arr,
    ]);

    // you could write your own sorting function like this if you want but you probably shouldn't need to// rsort( $products, function( $p1, $p2 ) {});// the html is for you to completeob_start();
    ?>
    <div class="products-list">
        <?php foreach ( $products as $product ) { ?>
            <div class="product">
                <pre>
                    <?= print_r( $product, true ); ?>
                    <?= get_title( $product->ID ); ?>
                </pre>
            </div>
        <?php } ?>
    </div>
    <?phpreturn ob_get_clean();
}

add_shortcode( 'custom_product_list', 'custom_product_list_shortcode' );

模板上使用shortcode：

[custom_products_list ids='32,21,44,56']

php模板上使用shortcode：

$shortcode_content = storefront_do_shortcode(
    'products ',
    apply_filters(
    'storefront_recent_products_shortcode_args ',
        array(
        'orderby '  => esc_attr( $args[ 'orderby '] ),
        'order '    => esc_attr( $args[ 'order '] ),
        'per_page ' => in tval( $args[ 'limit '] ),
        'columns '  => in tval( $args[ 'columns '] ),
        )
    )
);

WooCommerce自带短代码：

[products limit="12" columns="4" orderby="popularity"]
[woocommerce_checkout]
[woocommerce_my_account]  等等.....

参考：https://quadlayers.com/woocommerce-shortcodes-the-ultimate-guide/

D. 自定义邮件模板：

参考：https://kinsta.com/topic/wordpress-plugins/#lms

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