WP 检查自定义帖子标题是否存在于 wp_insert_post 之前

Question

我正在尝试在运行 wp_insert_post() 之前进行条件检查（检查是否存在具有相同帖子标题的帖子），但即使找到现有帖子，它仍然接受插入。 我尝试使用 post_exists()，但是这个 function 出于某种原因破坏了整个页面。 我究竟做错了什么？

页脚.php：

<?php

$statusmessage = '';

if (isset($_POST['footer-email'])){

$footer_email = $_POST['footer-email'];

$args = array(
"post_title" => $footer_email,
"post_type" => 'subscriptions',
"post_status" => 'publish',
);
$query = new WP_Query( $args );

if($query->have_posts()) {

$statusmessage = '<p class="subscription-confirmation">You have already signed up.</p>';

} 
    
else {
      
$my_post = array(
'post_title' => "$footer_email",
'post_content' => "$footer_email",
'post_type' => 'subscribers',
'post_status' => 'publish',
);

$post_id =  wp_insert_post( $my_post );

$statusmessage = '<p class="subscription-confirmation">You have successfully signed up.</p>';
            
} // end else

wp_reset_postdata();

} // end if isset footer email

?>

Answer 1

您可以使用post_exists() 。 检查以下内容。

<?php

    $statusmessage = '';

    if (isset($_POST['footer-email'])){

        $footer_email = $_POST['footer-email'];

        if( ! post_exists( $footer_email ) ){

            $my_post = array(
                'post_title'   => "$footer_email",
                'post_content' => "$footer_email",
                'post_type'    => 'subscribers',
                'post_status'  => 'publish',
            );

            $post_id =  wp_insert_post( $my_post );

            $statusmessage = '<p class="subscription-confirmation">You have successfully signed up.</p>';

        }
                    
    } // end if isset footer email

您可以使用get_page_by_title()按标题获取订阅者。

$statusmessage = '';

if ( isset( $_POST['footer-email'] ) ){

    $footer_email = $_POST['footer-email'];
    
    $subscribers = get_page_by_title( $footer_email , OBJECT, 'subscribers' );

    if( !$subscribers->ID ){

        $my_post = array(
            'post_title'   => "$footer_email",
            'post_content' => "$footer_email",
            'post_type'    => 'subscribers',
            'post_status'  => 'publish',
        );

        $post_id =  wp_insert_post( $my_post );

        $statusmessage = '<p class="subscription-confirmation">You have successfully signed up.</p>';

    }
}           

或自定义 wpdb 查询。

global $wpdb;

$postid = $wpdb->get_var( "SELECT ID FROM $wpdb->posts WHERE post_title = '" . $footer_email . "'" );

if( !$postid ){

    $my_post = array(
        'post_title'   => "$footer_email",
        'post_content' => "$footer_email",
        'post_type'    => 'subscribers',
        'post_status'  => 'publish',
    );

    $post_id =  wp_insert_post( $my_post );

    $statusmessage = '<p class="subscription-confirmation">You have successfully signed up.</p>';

}