GET_POST-检查自定义域是否有内容？

我有一个很好的循环，但我必须检查post对象（“houses”）的自定义字段是否有内容。我用“isset”试了一下，什么都没发生。也试过“isset”，但问题是一样的。

$args2 = array (
    \'numberposts\' => -1,
    \'post_type\'   => \'houses\'
);
$custom_posts2 = get_posts($args2);
foreach ( $custom_posts2 as $custom_post2 ) {

// check here if custom post type opjects custom field "sz_website" has content
if ( !empty ($custom_post2->post_website)) {
    echo \'<div class="wpcf7-list-item-field">\' . $custom_post2->sz_website . \'</div>\';
} else { 
    echo "do nothing"; 
}

}
wp_reset_postdata();

$args2 = array ( \'numberposts\' => -1, \'post_type\' => \'houses\' ); $custom_posts2 = get_posts($args2); foreach ( $custom_posts2 as $custom_post2 ) { // check here if custom post type opjects custom field "sz_website" has content $sz_website = get_post_meta( $custom_post2->ID, \'sz_website\', true ); if ( !empty ($sz_website)) { echo \'<div class="wpcf7-list-item-field">\' . $sz_website . \'</div>\'; } else { echo "do nothing"; } } wp_reset_postdata();

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