php - 提交后字段数据未显示在前端
问题描述
我正在提交一个使用 update_field 函数更新 Wordpress ACF 字段数据的表单。这很好用，但我遇到的问题是数据被提交，它将它添加到 Wordpress 中正确的 ACF 字段，但我随后手动刷新页面以查看前端的新数据。
如何提交数据然后在第一次重新加载时显示？
<form action="#" class="forum-post-comment-form" id="forum-comment-<?php echo $counter; ?>" method="get">
<input type="text" placeholder="Type your answer here" class="forum-comment-box" id="forum-comment-<?php echo $counter; ?>" name="forum-comment-<?php echo $counter; ?>">
<span><input type="submit" class="comment-submit-btn" name="submit-<?php echo $counter; ?>" value=""></span>
</input>
</form>
<?php
$value = array();
if( have_rows( 'comments', $postid ) ):
while( have_rows( 'comments', $postid ) ): the_row();
$time_posted = get_sub_field( 'time', $postid );
$posted = get_sub_field( 'posted_by', $postid );
$comment = get_sub_field( 'comment', $postid );
$answerresponse = get_sub_field( 'answer', $postid );
$value[] = array(
"time" => $time_posted,
"posted_by" => $posted,
"comment" => $comment,
"answer" => $answerresponse
);
endwhile;
endif;
$submit = "submit-" . $counter;
if(isset($_POST[$submit])){
$form = "forum-comment-" . $counter;
$finalanswer = "answer-" . $counter;
$finalanswer = $_POST[$finalanswer];
$comment = $_POST[$form];
//if ($comment != "") {
$time_posted = date('Y-m-d H:i:s', time());
// Comments
$postid = get_the_id();
$field_key = "field_5c90d272c7ca9";
$value[] = array(
"time" => $time_posted,
"posted_by" => $current_user->ID,
"answer" => $finalanswer,
"comment" => $comment,
);
update_field( $field_key, $value, $postid );
//}
}
?>
ACF 字段布局：
if( function_exists('acf_add_local_field_group') ):
acf_add_local_field_group(array(
'key' => 'group_5c90d20a076ab',
'title' => 'Comments',
'fields' => array(
array(
'key' => 'field_5c90d272c7ca9',
'label' => 'Comments',
'name' => 'comments',
'type' => 'repeater',
'instructions' => '',
'required' => 0,
'conditional_logic' => 0,
'wrapper' => array(
'width' => '',
'class' => '',
'id' => '',
),
'collapsed' => '',
'min' => 0,
'max' => 0,
'layout' => 'block',
'button_label' => 'Add Comment',
'sub_fields' => array(
array(
'key' => 'field_5c90f06883914',
'label' => 'Time',
'name' => 'time',
'type' => 'date_time_picker',
'instructions' => '',
'required' => 0,
'conditional_logic' => 0,
'wrapper' => array(
'width' => '33',
'class' => '',
'id' => '',
),
'display_format' => 'Y-m-d H:i:s',
'return_format' => 'Y-m-d H:i:s',
'first_day' => 1,
),
array(
'key' => 'field_5c90ee4fc7cac',
'label' => 'Posted by',
'name' => 'posted_by',
'type' => 'user',
'instructions' => '',
'required' => 0,
'conditional_logic' => 0,
'wrapper' => array(
'width' => '33',
'class' => '',
'id' => '',
),
'role' => '',
'allow_null' => 0,
'multiple' => 0,
'return_format' => 'array',
),
array(
'key' => 'field_5c90d38cc7cab',
'label' => 'Answer?',
'name' => 'answer',
'type' => 'text',
'instructions' => 'Change to "Yes" to mark as the answer',
'required' => 0,
'conditional_logic' => 0,
'wrapper' => array(
'width' => '33',
'class' => '',
'id' => '',
),
'default_value' => 'No',
'placeholder' => '',
'prepend' => '',
'append' => '',
'maxlength' => '',
),
array(
'key' => 'field_5c90d28ac7caa',
'label' => 'Comment',
'name' => 'comment',
'type' => 'textarea',
'instructions' => '',
'required' => 0,
'conditional_logic' => 0,
'wrapper' => array(
'width' => '100',
'class' => '',
'id' => '',
),
'default_value' => '',
'placeholder' => '',
'maxlength' => '',
'rows' => '',
'new_lines' => '',
),
),
),
),
'location' => array(
array(
array(
'param' => 'post_type',
'operator' => '==',
'value' => 'forum',
),
),
),
'menu_order' => 0,
'position' => 'normal',
'style' => 'default',
'label_placement' => 'top',
'instruction_placement' => 'label',
'hide_on_screen' => array(
0 => 'excerpt',
1 => 'discussion',
2 => 'comments',
3 => 'slug',
4 => 'author',
5 => 'format',
6 => 'page_attributes',
7 => 'featured_image',
8 => 'categories',
9 => 'tags',
10 => 'send-trackbacks',
),
'active' => true,
'description' => '',
));
endif;
解决方案
输出评论数据后，有表格（如上面的问题所示），然后是
update_field下面的函数（也在上面的问题中）
所以实际上，存在问题——您应该在页面呈现之前而不是之后更新字段。
工作解决方案
所以我发布了wp-admin/admin-post.php触发钩子的表单admin_post_{action}（对于经过身份验证的用户）或admin_post_nopriv_{action}（对于未经过身份验证的用户）。您可以使用init钩子或任何类似的钩子，但我认为它admin-post.php是处理表单提交的一个很好的网关，无论是通过GETorPOST方法 - 如果您熟悉wp_ajax_{action}, 则与此admin_post_{action}类似，除了非 AJAX请求.
HTML + PHP 表单
<form action="<?php echo admin_url( 'admin-post.php' ); ?>" class="forum-post-comment-form" id="forum-comment-<?php echo $counter; ?>" method="post">
<input type="text" placeholder="Type your answer here" class="forum-comment-box" id="forum-comment-<?php echo $counter; ?>" name="forum_comment" />
<!-- I manually added these radios; make sure to edit the code.. -->
<div>
Mark as the answer?
<label><input type="radio" name="answer" value="Yes" /> Yes</label>
<label><input type="radio" name="answer" value="No" /> No</label>
</div>
<!-- Hidden data for add_forum_comment() which updates the field. -->
<input type="hidden" name="counter" value="<?php echo $counter; ?>" />
<input type="hidden" name="post_id" value="<?php echo $postid; ?>" />
<input type="hidden" name="action" value="add-forum-comment" />
<span><input type="submit" class="comment-submit-btn" name="submit" value=""></span>
</form>
处理表单提交的 PHP 函数
add_action( 'admin_post_add-forum-comment', 'add_forum_comment' ); // for authenticated users
//add_action( 'admin_post_nopriv_add-forum-comment', 'add_forum_comment' ); // for non-authenticated users
function add_forum_comment() {
// Check if the post is valid.
$postid = filter_input( INPUT_POST, 'post_id' );
if ( ! $post = get_post( $postid ) ) {
wp_die( 'The post does not exist.' );
}
// Check if we've got a valid comment.
$posted_comment = filter_input( INPUT_POST, 'forum_comment' );
if ( ! $posted_comment ) {
// Redirect back to the post.
wp_redirect( get_permalink( $postid ) );
exit;
}
// Initialize $value and fill it with existing values.
$value = array();
if( have_rows( 'comments', $postid ) ):
while( have_rows( 'comments', $postid ) ): the_row();
$time_posted = get_sub_field( 'time', $postid );
$posted = get_sub_field( 'posted_by', $postid );
$comment = get_sub_field( 'comment', $postid );
$answerresponse = get_sub_field( 'answer', $postid );
$value[] = array(
"time" => $time_posted,
"posted_by" => $posted,
"comment" => $comment,
'answer' => $answerresponse,
);
endwhile;
endif;
// Now update the ACF field.
$counter = filter_input( INPUT_POST, 'counter' );
$finalanswer = filter_input( INPUT_POST, 'answer' );
$time_posted = date('Y-m-d H:i:s', time());
// Comments
$field_key = "field_5c90d272c7ca9";
$value[] = array(
"time" => $time_posted,
"posted_by" => get_current_user_id(),
'answer' => $finalanswer,
"comment" => $posted_comment,
);
update_field( $field_key, $value, $postid );
// Redirect back to the post.
wp_redirect( get_permalink( $postid ) );
exit;
}
久经考验的工作。而且您不必使用完全相同的代码，但我希望代码对您有所帮助。另外，我get_current_user_id()用来获取当前用户的 ID。
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