Code below has been updated to reflect answer, and is now a working example;
<原始问题：下面是我的代码。我根据以下引用构建了它，但当它运行时，我没有收到控制台错误，也没有收到error\\u日志中的错误。表单提交时不会覆盖任何内容，页面重新加载时会丢失内容。提前感谢您的帮助
Javascript (js/custom.js)
$(document).ready(function () {
// AJAX
$( \'#um_form\' ).submit( function() {
// Grab our post meta value
var um_val = $( \'#um_form #um_key\' ).val();
$.post(my_ajax_obj, {
_ajax_nonce: my_ajax_obj.nonce, //nonce
action: "my_tag_count", //action
\'custom_meta\': um_val,
});
// Stop form from submitting
return false;
} );
//required post-load event
$( document.body ).trigger( \'post-load\' );
}); // end document ready
Functions.php
//AJAX
$ajax_url = admin_url( \'admin-ajax.php\' ); // Localized AJAX URL
// Register Our Script for Localization
wp_register_script(
\'custom\', // Our Custom Handle
"/wp-content/themes/myTheme/js/custom.js", // Script URL, this
script is located for me in `theme-name/scripts/um-modifications.js`
array( \'jquery\' ), // Dependant Array
\'1.0\', // Script Version (
Arbitrary )
true // Enqueue in Footer
);
// Localize Our Script so we can use `ajax_url`
wp_localize_script( \'custom\', \'my_ajax_obj\', $ajax_url );
wp_enqueue_script( \'custom\' );
}
function my_action() {
// Ensure we have the data we need to continue
if( ! isset( $_POST ) || empty( $_POST ) || ! is_user_logged_in() ) {
// If we don\'t - return custom error message and exit
header( \'HTTP/1.1 400 Empty POST Values\' );
echo \'Could Not Verify POST Values.\';
exit;
}
$user_id = get_current_user_id();
//collect & sanitize
$um_val = sanitize_text_field( $_POST[\'custom_meta\'] );
//update info
update_user_meta( $user_id, \'custom_meta\', $um_val );
exit;
}
//add AJAX for logged in users only
add_action( \'wp_ajax_my_tag_count\', \'my_action\' );
User-profile.php (custom page type)
<?php
$user_id = get_current_user_id();
//collect data for rendering
$test1 = get_user_meta( $user_id, \'custom_meta\', true);
?>
<form id="um_form" method="POST">
<label for="um_key">
User Meta Value:
<input type="text" name="um_key" id="um_key" value="<?php echo $test1;?>" style="width:100%;" />
</label>
<input type="submit" value="Submit" />
</form>
最合适的回答,由SO网友:Shibi 整理而成
这个wp_ajax_ 是ajax操作的前缀。你的行动是my_tag_count 所以它应该是：
add_action( \'wp_ajax_my_tag_count\', \'my_action\' );
您试图在ajax请求中访问错误的url，因为您设置了
wp_localize_script( \'custom\', \'my_ajax_obj\', $ajax_url );
所以请求url应该是
my_ajax_obj 它不是一个物体它没有
ajax_url 在里面。因此在请求url中仅使用
my_ajax_obj.
Another things
添加到
get_user_meta 第三个参数为true，以获取单个值而不是数组。
$test1 = get_user_meta( $user_id, \'custom_meta\', true );
您不需要初始化use meta update，如果存在，它将更新，如果没有，它将添加。所以你只需要这个。
$user_id = get_current_user_id();
$um_val = sanitize_text_field( $_POST[\'custom_meta\'] );
update_user_meta( $user_id, \'custom_meta\', $um_val );
